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DWK 986542 WHEATON Liquid Scintillation Vials, Borosilicate Glass, 22-400 White Urea Caps Attached to Vials, Metal Foil / Cork Liner, 20 mL

DWK 986542 WHEATON Liquid Scintillation Vials, Borosilicate Glass, 22-400 White Urea Caps Attached to Vials, Metal Foil / Cork Liner, 20 mL

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WHEATON® 986542 Glass Liquid Scintillation Vials - 20 mL, White Urea 22-400 Caps, Metal Foil/Cork Liners, 500/Case

WHEATON® 986542 Liquid Scintillation Vials from DWK Life Sciences are 20 mL clear borosilicate glass vials supplied with white urea 22-400 screw caps attached to the vials. The caps feature a distinctive metal foil/cork liner, making this a specific manufacturer-defined vial-and-closure assembly for suitable liquid scintillation counting and laboratory sample-handling workflows.

DWK specifies a 28 mm vial diameter and 57 mm vial height without the cap. The height including the supplied cap is 61 mm. Laboratories should verify these assembled dimensions against the requirements of their scintillation counters, vial racks, or sample holders before use.

The manufacturer's liquid scintillation vial family is described as produced from Type I borosilicate glass tubing, with consistent, low background counts and high ultraviolet (UV) transmission. These qualitative characteristics are relevant to light-detection methods; numerical counting efficiency and background values must be established using the actual analytical method.

The most important selection distinction is the white urea cap with metal foil/cork liner. This is not the polypropylene cap and metal foil/pulp liner used on WHEATON 986541, nor the polypropylene cap with foamed polyethylene liner used on WHEATON 986540. The exact cap and liner should be evaluated against the sample, scintillation cocktail, solvent exposure, and storage conditions.

DWK identifies WHEATON 986542 as non-sterile, not autoclavable, and supplied without a marking spot. The 20 mL capacity is nominal rather than a calibrated volumetric measurement. Each manufacturer case contains 500 vials with the specified attached caps.

Ordering note: WHEATON part number 986542 is the 20 mL borosilicate glass scintillation vial with attached white urea 22-400 screw cap and metal foil/cork liner, 500 per case. The complete assembly is non-sterile and not autoclavable. Scintillation cocktails, analytical instruments, and separate storage accessories are not included. Do not substitute foil/pulp, foil/cork, polyethylene foam, or a 24-400 cap without confirming the laboratory's requirements.

Specifications:
  • Manufacturer: DWK Life Sciences
  • Brand: WHEATON®
  • Manufacturer part number: 986542
  • Product type: Glass liquid scintillation vial with attached screw cap
  • Capacity: 20 mL nominal
  • Vial material: Borosilicate glass; Type I borosilicate tubing product family
  • Vial color: Clear
  • Vial diameter: 28 mm
  • Vial height without cap: 57 mm
  • Overall height with cap: 61 mm
  • Thread / closure finish: 22-400
  • Cap included: Yes, attached to vial
  • Cap material: Urea
  • Cap color: White
  • Liner material: Metal foil / cork
  • Marking spot: No
  • Sterile: Non-sterile
  • Autoclavable: No - manufacturer lists not autoclavable
  • Manufacturer-described background: Consistent and low
  • Manufacturer-described optical properties: High UV transmission
  • Primary application: Liquid scintillation counting
  • Purchase unit: Case
  • Quantity per case: 500 vial-and-cap units
  • Numerical liner chemical-resistance ratings: Not established for this exact metal foil/cork liner
  • Numerical scintillation background or UV-transmission ratings: Not established in reviewed SKU specifications
  • Inner tray count, shipping weight, and carton dimensions: Not confirmed for this SKU
Why the Urea Cap and Metal Foil/Cork Liner Matter

A scintillation vial's closure can influence sample containment, evaporation, material compatibility, and instrument clearance. WHEATON 986542 uses a white urea screw cap with a metal foil/cork liner. Both components are specified by DWK for this part number.

Foil/cork should not be confused with foil/pulp: cork and pulp are different backing materials. DWK's general Closure Liner Guide includes chemical-resistance information for pulp/metal foil, but the reviewed reference does not provide equivalent detailed resistance data for 986542's foil/cork liner. Consequently, the foil/pulp ratings should not be copied onto the foil/cork assembly.

Confirm compatibility of the borosilicate glass, urea cap, and foil/cork liner with the complete scintillation cocktail and sample formulation, including solvent vapor, concentration, temperature, and exposure time. An attached cap does not by itself establish a leakproof, vapor-tight, pressure-rated, or long-term chemical-storage container.

Material qualification: The exact metal foil/cork liner is manufacturer-verified, but numerical chemical-resistance, extractables, and sealing-performance ratings for the finished 986542 assembly were not found in the reviewed public specifications. Request DWK documentation or test the intended process when these characteristics are critical.

About the Manufacturer:

WHEATON®, a DWK Life Sciences brand, supplies laboratory glassware, plastic vials, screw caps, closures, and sample-handling products. The WHEATON liquid scintillation vial range offers multiple glass and plastic vial materials, thread finishes, cap materials, liners, and cap-packing configurations. Exact manufacturer part numbers help laboratories specify the correct complete assembly.

WHEATON 986542 Features:
  • 20 mL nominal clear borosilicate glass liquid scintillation vial
  • Manufactured in WHEATON's Type I borosilicate glass scintillation family
  • 28 mm vial diameter and 57 mm uncapped height
  • 61 mm overall height with supplied screw cap
  • 22-400 threaded neck finish
  • White urea screw cap included and attached to vial
  • Metal foil/cork closure liner
  • Manufacturer-described low and consistent scintillation background
  • Manufacturer-described high UV transmission
  • No marking spot
  • Manufacturer-designated non-sterile presentation
  • Manufacturer-designated not autoclavable
  • 500 complete capped vials per case
WHEATON 986542 Benefits:
  • Defined vial-and-cap configuration: The 22-400 white urea cap and metal foil/cork liner are supplied with the correct glass vial.
  • Scintillation-focused product family: WHEATON identifies low background and high UV transmission as relevant glass-vial characteristics.
  • Clear borosilicate glass: Enables visual inspection and offers general borosilicate glass chemical durability.
  • Published assembled dimensions: A 61 mm capped height helps laboratories assess instrument loading clearance.
  • Exact closure distinction: Supports selection when foil/cork is specified instead of foil/pulp, foamed PE, or another liner.
  • Case-based replenishment: A 500-vial case provides a consistent manufacturer purchasing quantity.
  • Documented limitations: Explicit non-sterile and non-autoclavable classifications help prevent inappropriate processing assumptions.
Common Applications:
  • Liquid scintillation counting (LSC) with compatible instruments
  • Radiolabeled sample analysis under authorized laboratory procedures
  • Life sciences and biochemical tracer research
  • Environmental and analytical laboratory scintillation methods
  • Research workflows requiring a 20 mL borosilicate vial with a specified attached closure
  • Compatible sample handling where foil/cork and urea closure materials meet the application requirements
  • Laboratory quality-control or research sample preparation

The applications above are potential uses, not independent certifications for a specific radionuclide, cocktail, counter, sample chemistry, or regulated analytical procedure.

Best-Practice Use:
  • Confirm product identity: Verify WHEATON 986542 and the urea/foil-cork closure configuration.
  • Inspect the assembly: Check glass walls, rim, thread, cap, and liner for defects before use.
  • Validate chemistry: Confirm the exact sample and scintillation cocktail are compatible with glass, urea, and foil/cork.
  • Check counter compatibility: Verify the 28 mm diameter and 61 mm capped height against the instrument's approved holder.
  • Control liquid volumes: Follow the method's sample, cocktail, and headspace requirements rather than using 20 mL as a universal working fill.
  • Follow closure procedure: Do not assume a certified leakproof seal or invent a cap-tightening torque.
  • Label appropriately: The vial has no marking spot; use an identification system compatible with the counting instrument.
  • Apply QC: Use background blanks, calibration checks, and standards required by the analytical method.
  • Handle hazards: Follow chemical, radiological, ventilation, and waste-management requirements.
  • Do not autoclave: The manufacturer specifically designates the complete 986542 product not autoclavable.
Selection Notes: 986542 vs. Other 20 mL WHEATON Vials
  • 986542: 22-400 white urea cap attached; metal foil/cork liner; 500/case.
  • 986541: 22-400 white polypropylene cap attached; metal foil/pulp liner; 500/case.
  • 986540: 22-400 white polypropylene cap attached; foamed polyethylene liner; 500/case.
  • 986546: 22-400 white urea cap attached; polyethylene cone liner; 500/case.
  • 986548: 22-400 white urea cap attached; polyethylene disc liner; 500/case.
  • 986582: White urea 22-400 cap with metal foil/cork liner, but caps packed separately instead of attached.
  • 986562: White urea cap with metal foil/cork liner, but uses a different 24-400 thread finish.
  • 986532: 20 mL 22-400 borosilicate vial without caps.

Substitution rule: A matching 20 mL capacity does not guarantee identical closure chemistry, thread fit, liner performance, or cap packaging. Use the exact manufacturer SKU approved by the laboratory.

Manufacturer Technical Documentation:

Closure Liner Guide: Review DWK screw-thread and liner selection guidance — General principles for thread fit and material testing. The guide's foil/pulp chemical ratings are not verified foil/cork ratings.

Glass Types & Properties: Review DWK borosilicate glass technical information — General material classification, chemical durability, and glass properties.

Care & Maintenance: Review DWK laboratory glassware handling guidance — General inspection and damage-prevention practices.

General Glassware Cleaning: Review DWK laboratory glassware cleaning advice — Washing, rinsing, and safe glassware handling. General advice does not override 986542's non-autoclavable designation.

Why Order WHEATON 986542 From SOSCleanroom?
  • Exact-SKU sourcing: Identify the specified white urea cap, metal foil/cork liner, and 22-400 thread finish.
  • Configuration support: Get assistance distinguishing foil/cork from foil/pulp and other scintillation vial liners.
  • Manufacturer information: Request available technical documentation and clarification of product-specific requirements.
  • Centralized purchasing: Source laboratory glassware and critical-environment consumables through Specialty Optical Systems, Inc.
  • Responsive service: Contact SOSCleanroom directly for quotations, availability, and ordering questions.

Technical note: For further information on metal foil/cork liner selection, scintillation background, vial geometry, and product-family comparisons, see The Technical Vault.

For pricing, availability, and product questions, contact Sales@SOSsupply.com or (214) 340-8574.

Product page updated: October 27, 2026

© 2026 Specialty Optical Systems, Inc. (dba SOSCleanroom). All rights reserved.

The Technical Vault By SOSCleanroom
WHEATON 986542 20 mL Borosilicate Glass 22-400 White Urea Cap Metal Foil / Cork 28 x 61 mm Capped Non-Sterile Not Autoclavable 500/Case
WHEATON 986542: technical overview and exact assembly selection

WHEATON® 986542 is a 20 mL clear borosilicate glass liquid scintillation vial from DWK Life Sciences with an attached white urea 22-400 screw cap and a metal foil/cork liner. The manufacturer lists 28 mm outside diameter, 57 mm height without the cap, and 61 mm total height including the cap.

The product family is intended for liquid scintillation counting and is described as having consistent low background counts and high UV transmission. The exact SKU is designated non-sterile, not autoclavable, and supplied without a marking spot. A manufacturer case contains 500 vial-and-cap units.

Successful selection depends on the entire glass + urea cap + foil/cork liner system. The words metal foil/cork distinguish 986542 from WHEATON 986541's metal foil/pulp and 986540's foamed polyethylene. Their material-specific compatibility characteristics must not be assumed identical.

Operations takeaway: Specify 986542, 20 mL, clear borosilicate, 28 x 57 mm uncapped / 28 x 61 mm capped, attached white urea 22-400 cap, metal foil/cork liner, 500 per case. The product is non-sterile and not autoclavable. Assess cocktail and sample compatibility with the exact foil/cork construction, not with a foil/pulp data table.

Exact-SKU specifications for RFQs, SOPs, and receiving
  • Manufacturer / brand: DWK Life Sciences / WHEATON®
  • Catalog number: 986542
  • Product type: Glass liquid scintillation vial with attached cap
  • Nominal capacity: 20 mL
  • Vial material: Clear borosilicate glass
  • Product-family material description: Type I borosilicate glass tubing
  • Color: Clear
  • Diameter: 28 mm
  • Vial height excluding cap: 57 mm
  • Height including cap: 61 mm
  • Neck finish / cap thread: 22-400
  • Cap included: Yes, attached to the vial according to manufacturer configuration
  • Cap material: Urea
  • Cap color: White
  • Liner: Metal foil / cork
  • Marking spot: No
  • Sterility: Non-sterile
  • Autoclavability: Not autoclavable
  • Scintillation background: Manufacturer describes background counts as consistent and low
  • Optical behavior: Manufacturer describes UV transmission as high
  • Purchase unit: Case
  • Case quantity: 500 vials with caps
  • Calibrated working volume: Not established; 20 mL is nominal
  • Exact foil/cork chemical compatibility: No numerical rating or application-specific approved solvent list verified
  • Certified leak rate / sealing pressure: Not established
  • Lot-specific scintillation background or optical spectrum: Not established in reviewed SKU listing
  • Inner tray count / country of origin / shipping weight: Not confirmed in current exact-SKU listing

Dimension note: DWK distinguishes 57 mm vial height from 61 mm overall capped height. The 20 mL size does not establish a graduated measuring tolerance or universal sample-plus-cocktail working volume.

Metal foil/cork: what is known and what requires qualification

DWK specifies metal foil/cork as the liner material used in WHEATON 986542. The cap material is independently specified as urea. The manufacturer product data does not provide a detailed liner-layer drawing, foil alloy, layer thickness, finished-closure leak rate, or a numerical chemical-compatibility rating for the foil/cork assembly.

The name identifies two different material classes in the liner, but without a technical drawing the laboratory should not assume which layer faces the liquid or vapor, whether an adhesive is present or chemically exposed, or how the complete cap performs after repeated closing and opening.

Property986542 verification status
Cap bodyWhite urea: manufacturer verified
Closure thread22-400: manufacturer verified
Liner identityMetal foil/cork: manufacturer verified
Foil alloy / thickness / layer orientationNot specified in reviewed SKU data
Resistance to individual solventsRequires product-specific confirmation and testing
Leakproof / vapor-tight ratingNot established
Autoclave compatibilityFinished SKU explicitly not autoclavable

DWK's general Closure Liner Guide contains a row for pulp/metal foil, described as aluminum foil bonded to pulp board, and includes chemical-resistance notes for that different liner. It does not establish that foil/cork has the same construction, barrier properties, or chemical resistance.

Critical distinction: Never copy the manufacturer's foil/pulp resistance claims onto foil/cork. The complete 986542 closure must be assessed against the actual cocktail or sample formulation, including solvent vapors and storage conditions.

Foil/cork vs. foil/pulp vs. foamed polyethylene

Three adjacent WHEATON 20 mL scintillation-vial SKUs use similar glass geometry but different cap and liner materials. Each requires separate qualification for the intended sample and scintillation cocktail.

Feature986542986541986540
Cap materialUreaPolypropylenePolypropylene
Liner materialMetal foil/corkMetal foil/pulpFoamed PE
22-400 / 28 x 61 mm cappedYesYesYes
Liner-specific public material guideNot verified for foil/corkGeneral foil/pulp notes existGeneral PE foam notes exist
AutoclavabilityNoNoNo

The manufacturer describes foil/pulp as generally resistant to several organic chemical categories but not good for acids or alkalis, and PE foam as having poor resistance to hydrocarbon solvents. Those claims belong to those specific general liner types and cannot be used to establish the chemical resistance of 986542 foil/cork.

Liquid scintillation counting: glass, optical transmission, and background

In liquid scintillation counting (LSC), a prepared sample is combined with an appropriate scintillation cocktail. Radiation energy deposited in the mixture can generate light that a counting instrument detects. The container affects the complete measurement through optical transmission, background contribution, geometry, and sample handling.

WHEATON identifies consistent low background counts and high UV transmission for its liquid scintillation vial family. Historical WHEATON literature describes the glass scintillation family as manufactured from WHEATON 180 low-potassium borosilicate glass; the current 986542 page confirms borosilicate glass but provides no exact potassium percentage or instrument-independent count rate.

  • Background: Use method blanks and instrument quality-control checks; low background does not mean zero background.
  • UV transmission: Manufacturer-described as high, without a SKU-specific percent transmission or cutoff wavelength.
  • Counter compatibility: Confirm the 28 mm diameter and assembled 61 mm height against the approved loading system.
  • Counting efficiency: Determined by the full instrument, sample, isotope, cocktail, and method setup.
  • Working volume: Follow the prescribed sample and scintillation cocktail volumes rather than filling to a nominal 20 mL.
  • Quality controls: Use laboratory-required standards, blank correction, and quench controls.

Performance boundary: WHEATON 986542 is not a calibrated radiation-measuring device. Its published material claims do not establish isotope-specific sensitivity, minimum detectable activity, counting efficiency, or an absolute background count value.

Borosilicate glass properties and standards context

DWK identifies the 986542 vial material as borosilicate glass and describes the broader family as converted from Type I borosilicate glass tubing. WHEATON's older technical guide identifies its liquid scintillation glass as WHEATON 180 low-potassium borosilicate and discusses USP Type I and ASTM E438 Type I, Class A material characteristics. Historical descriptions are not a current lot-specific certificate.

Borosilicate glass generally has good hydrolytic and chemical resistance, but not universal compatibility. Hydrofluoric acid and strongly alkaline conditions can attack glass. Do not assign physical-property values of a different glass type or a particular 3.3-expansion composition to the finished 986542 vial without confirmation.

  • Current exact-SKU material: Borosilicate glass.
  • Family manufacturing description: Type I borosilicate glass tubing.
  • Historical glass family: WHEATON 180 low-potassium borosilicate.
  • Specific material certificate: Request from the manufacturer when required.
  • Temperature processing: Finished 986542 assembly is explicitly not autoclavable regardless of generic glass properties.
  • Sample compatibility: Assess glass, cap, and liner together.
Chemical compatibility: evaluate the complete three-material assembly

An LSC sample may contact the glass vial directly and expose the cap or liner to liquid, condensate, or solvent vapors. Therefore, a glass-only resistance statement is insufficient. The borosilicate vial, urea cap, and metal foil/cork liner should all be qualified for the intended contact conditions.

Chemical exposureWhat the laboratory should verify
Water-based samples / bufferspH, ionic composition, liner exposure, sample stability
Organic scintillation cocktailsAll solvent components; exact foil/cork and cap compatibility
Volatile mixturesVapor exposure, containment, cap integrity, ventilation
Acids and basesGlass resistance, cap/liner durability, concentration and time
Analytical trace samplesBackground, potential extractables, sample recovery, blanks
Cleaning reagentsSuitability for glass and closure materials, residue control

This table is a technical review checklist, not a product-specific approved chemical list. Confirm material compatibility using the formulation's safety data sheet, manufacturer documentation, and application tests when appropriate.

Critical qualification point: The presence of metal foil does not make the liner chemically inert, PTFE-equivalent, hermetic, or compatible with every solvent. Neither the foil/cork assembly nor the urea cap has a published universal chemical exposure rating for WHEATON 986542.

Dimensions, 22-400 thread, and instrument clearance

The current DWK specification reports 28 mm diameter, 57 mm height without cap, and 61 mm with cap. The manufacturer-defined 22-400 closure finish helps identify the correct cap configuration but is not evidence of certified leakproof performance.

Dimension or featureSelection significance
20 mL nominal volumeVial size class; not a volumetric calibration
28 mm diameterHolder, rack, and carousel compatibility
57 mm without capGlass-vial height
61 mm with capAssembled height for counter clearance
22-400 threadSpecified neck/closure finish
No marking spotUse an appropriate laboratory label if needed

Instrument-fit checkpoint: A 28 x 61 mm assembled dimension does not guarantee compatibility with every liquid scintillation counter. Check the instrument's stated cap profile, carrier dimensions, allowable vial material, and method-specific limitations.

Related WHEATON 20 mL vial SKUs: thread, liner, and cap-packing differences

WHEATON documents several 20 mL liquid scintillation glass vial configurations. Each row below represents a distinct catalog number, not a claim of drop-in chemical or instrument equivalence.

SKUCap / linerThreadCap presentation
986542White urea / foil-cork22-400Attached
986541White PP / foil-pulp22-400Attached
986540White PP / foamed PE22-400Attached
986546White urea / PE cone22-400Attached
986548White urea / PE disc22-400Attached
986582White urea / foil-cork22-400Caps packed separately
986562White urea / foil-cork24-400Attached
986532No cap22-400Uncapped

The manufacturer WHEATON Vial Guide lists these configurations as 20 mL glass vials, 500 per case. The guide is used here for cross-SKU identification; it is not a product-specific chemical compatibility certificate.

Procurement warning: 986542 and 986582 use the same named cap/liner and 22-400 finish, but their cap packing differs. 986562 has a 24-400 thread. 986541 uses foil/pulp, not foil/cork. Confirm the exact SKU rather than substituting based on 20 mL capacity.

Cap handling, seal integrity, and solvent vapor control

The white urea cap and foil/cork liner are included as part of the manufacturer-specified assembly. Correct closure application and an undamaged threaded glass neck matter to sample integrity. A screw cap, however, does not establish certified leakproof, vapor-tight, or pressure-resistant performance.

  • Before use: Check cap threads, glass finish, and liner for damage or visible contamination.
  • Closure fit: Use the manufacturer-specified 22-400 assembly; a 24-400 cap is not interchangeable.
  • Application: Follow an approved closing method rather than inventing a torque value.
  • Vapor exposure: Evaluate compatibility with volatile cocktail constituents as well as liquid contact.
  • Handling: Follow facility rules for flammable solvents, radiation safety, secondary containment, and spill control.
  • Transport: Do not treat the vial as certified packaging for radioactive or hazardous material shipments.
Non-sterile and not autoclavable: explicit SKU restrictions

DWK identifies 986542 as non-sterile and not autoclavable. These exact-SKU designations override generic statements about the thermal resistance of some borosilicate laboratory glassware. The finished vial-and-cap assembly contains materials beyond the glass itself, including the urea closure and foil/cork liner.

Do not apply a glassware autoclave cycle, direct heating, or unapproved microwave procedure to the assembled product. No alternative validated sterilization procedure is established in the reviewed manufacturer specification.

  • Supplied sterile: No.
  • Autoclavable: No.
  • Validated alternate sterilization: Not documented in reviewed SKU information.
  • Special process needs: Seek explicit manufacturer guidance or select a qualified alternative.
  • Glass-only thermal data: Do not apply to the entire assembled urea-cap and cork-lined system.

Do not autoclave WHEATON 986542. If a facility proposes removing and separately processing bare glass, obtain product-specific DWK guidance and qualify the procedure rather than assuming it is approved.

Laboratory use and QC checklist
  1. Verify identity: Confirm WHEATON 986542 and a case of 500 with the urea/foil-cork closure.
  2. Inspect: Examine glass, rim, cap, thread, and liner for defects.
  3. Check dimensions: Confirm the 28 mm diameter and 61 mm assembled height fit the approved counter.
  4. Qualify materials: Assess the actual sample and cocktail against borosilicate, urea, and foil/cork.
  5. Prepare the sample: Use method-defined sample and cocktail quantities and mixing procedure.
  6. Control headspace: Use the specified working volume, not the nominal 20 mL as an automatic fill target.
  7. Apply the cap: Follow the laboratory's approved closure-handling practice.
  8. Label appropriately: No marking spot is provided; use an appropriate labeling method.
  9. Verify analytical background: Run blanks, standards, and quench or calibration checks required by the method.
  10. Handle hazardous samples: Follow chemical, radiation, ventilation, and waste protocols.
  11. Do not autoclave: This exact product is not autoclavable.
  12. Keep records: Retain the necessary receiving, sample, lot, and quality-control information.
Cleanroom and controlled-laboratory qualification

WHEATON 986542 may be evaluated for controlled analytical laboratories when its materials, packaging, cleanliness, and handling fit facility procedures. However, the reviewed manufacturer product record does not establish an ISO 14644 product class, cleanroom-processed packaging, low-endotoxin designation, validated DNase/RNase-free status, or a certified low-particle release rate.

  • Material introduction: Follow the facility's packaging removal and transfer process.
  • Sample integrity: Control vial cleanliness, labeling, and sample cross-contamination.
  • Closure integrity: Inspect the urea cap and foil/cork liner.
  • Traceability: Preserve applicable lot and analytical QC documentation.
  • Sterile processes: The product is non-sterile and not autoclavable; select qualified alternatives if needed.
Cleaning, inspection, storage, and reuse considerations

DWK's general glassware guidance recommends washing as appropriate, avoiding hard abrasive cleaning tools, thoroughly rinsing, and rejecting glassware with chips, cracks, scratches, or etching. For 986542, cleaning and reuse must also consider the urea cap, foil/cork liner, and sample or cocktail residues.

  1. Determine whether the analytical method permits reuse or requires disposal.
  2. Identify chemical, biological, or radioactive contamination before handling.
  3. Choose a cleaning procedure compatible with all material components, not only the glass.
  4. Avoid abrasive brushes, impact, and force that could damage the vial or thread.
  5. Use the required rinsing and residue-control steps.
  6. Inspect the glass and liner after cleaning for defects or persistent residue.
  7. Do not autoclave the complete product.
  8. Store glassware safely and maintain required identification.

Reuse caution: Do not assume that low-background performance is unchanged after unvalidated reuse or exposure to radioactive samples and scintillation cocktails. The method should define acceptance criteria and disposal requirements.

Important limitations and unsupported assumptions
  • Non-sterile: No sterile or aseptic-ready product designation.
  • Not autoclavable: Do not assign a 121°C or other steam-processing cycle.
  • No quantified foil/cork resistance: Do not import foil/pulp chemical ratings.
  • No certified leakproof seal: Screw-cap fit does not establish vapor-tight or pressure-resistant containment.
  • No confirmed PTFE or foil alloy: Do not describe unspecified liner layers or facing materials as certified.
  • No universal counter fit: Check actual loading-system clearance.
  • No calibrated volume: 20 mL is nominal.
  • No marking spot: Use an alternate approved sample-identification method.
  • No numerical background guarantee: Manufacturer low-background statement is qualitative.
  • No SKU-specific UV curve: Do not assign a percent transmission or cutoff wavelength.
  • No product-specific ISO cleanliness: Facility qualification required where applicable.
  • No confirmed inner trays: Do not claim a particular inner packaging count without manufacturer verification.
  • No radioactive shipping certification: Ordinary vial cases do not certify transportation of hazardous contents.
Technical FAQs

What is WHEATON 986542?

A 20 mL clear borosilicate glass scintillation vial with an attached white urea 22-400 cap and metal foil/cork liner.

Are the caps included and attached?

Yes. DWK identifies caps attached to the vials, with 500 units per case.

What are the dimensions?

28 mm outside diameter, 57 mm vial height without the cap, and 61 mm overall height with the cap.

Is the cap polypropylene?

No. DWK specifies a white urea cap for 986542. WHEATON 986541 has a white polypropylene cap.

Is the liner metal foil/pulp?

No. The exact manufacturer designation is metal foil/cork. Foil/pulp is a different liner used on other SKUs.

Does DWK publish specific foil/cork chemical ratings?

Not in the reviewed public exact-SKU and general liner guidance. Confirm the formulation and request product-specific information if needed.

Can foil/pulp resistance values be used for foil/cork?

No. Cork and pulp are different backing materials; chemical and sealing performance should not be assumed equivalent.

Is the vial sterile?

No. WHEATON 986542 is listed as non-sterile.

Can WHEATON 986542 be autoclaved?

No. The manufacturer's exact product record specifies not autoclavable.

Does it have a marking spot?

No. Select an appropriate external labeling method.

What differs between 986542 and 986541?

986542 uses a white urea cap with metal foil/cork; 986541 uses a white polypropylene cap with metal foil/pulp.

What differs between 986542 and 986582?

986542 has caps attached to the vials; 986582 has matching urea/foil-cork caps packaged separately.

Can a 24-400 cap replace the 22-400 cap?

No. 24-400 is a different closure finish. WHEATON 986562 is a distinct 24-400 configuration.

Is 20 mL a calibrated measuring capacity?

No. It is the nominal capacity; determine actual sample and cocktail volumes through the method.

Is 986542 compatible with every scintillation counter?

Not automatically. Confirm vial diameter, capped height, and the counter's approved sample-holder requirements.

Are background counts and UV transmission quantified?

DWK describes them qualitatively as low/consistent and high, respectively; no numerical values were verified for this SKU.

How many vials are in one case?

500 vials with their specified caps and liners.

Manufacturer technical references

These are verified manufacturer technical-information pages, not DWK shopping pages or product catalogs. General technical material should not be interpreted as a current lot certificate or an override of this SKU's explicit non-sterile and not autoclavable specifications.

For quotations or product questions, email Sales@SOSsupply.com or call (214) 340-8574. SOSCleanroom can help identify the required WHEATON vial, confirm cap and liner configuration, and request applicable DWK documentation. Technical insight: Liquid scintillation vial selection depends on background performance, instrument geometry, sample/cocktail chemistry, and exact closure materials. Metal foil/cork and foil/pulp are not equivalent liner specifications. Last updated: October 27, 2026 © 2026 Specialty Optical Systems, Inc. (dba SOSCleanroom). All rights reserved.