WHEATON® 56900-25210 Sterile Serological Pipette - 25 mL, Polystyrene, Individually Wrapped, 200/Case
WHEATON® 56900-25210 Sterile Disposable Serological Pipettes from DWK Life Sciences are 25 mL polystyrene pipettes designed for precise, convenient liquid transfer in cell culture, tissue culture, research, and general laboratory workflows. Manufactured from polystyrene compliant with USP Class VI material requirements, these clear, graduated pipettes are sterilized by gamma irradiation and supplied in individual paper/plastic peel-open wrappers.
Each pipette is calibrated to deliver (TD), with a manufacturer-specified ±0.5 mL tolerance at its 25 mL nominal capacity, equivalent to ±2% of nominal volume. The 0.2 mL graduations provide readable volume increments, while the bidirectional ascending and descending scales help users monitor liquid uptake and delivery during laboratory procedures.
The pipette includes 10 mL of negative graduations for additional graduated capacity beyond the principal scale. This scale feature should not be confused with an independently certified 35 mL nominal capacity or a guaranteed ±2% accuracy specification at every extended graduation.
DWK specifies a red color-coded band in its current 56900-25210 product listing and classifies the pipette as ASTM Class A. The manufacturer's individually wrapped 56900 series is designed for use where sterile, single-use liquid-handling supplies and convenient individual dispensing are required.
Each pipette is supplied with a plug at the upper end. DWK's manufacturer brochure describes the serological pipette plug as cotton, providing an additional contamination-control feature during appropriate pipetting procedures. Use with a compatible pipette controller or pipette aid as specified by the laboratory.
The manufacturer case contains 200 individually wrapped pipettes, with a shelf pack quantity of 50. Your DWK supplier product-add record identifies this item as made to stock, with room-temperature shipping and storage requirements for the unopened product.
Ordering note: Manufacturer part number 56900-25210 identifies the 25 mL, sterile, individually wrapped WHEATON serological pipette with 0.2 mL graduations and 200 pipettes per case. The 50-count shelf pack is a manufacturer packaging designation; confirm smaller selling units separately. This is not the 56800-25210 multipack configuration. Contact SOSCleanroom for current pricing, inventory, and lead time.
Specifications:
- Manufacturer: DWK Life Sciences
- Brand: WHEATON®
- Manufacturer Part Number: 56900-25210
- Product Type: Disposable sterile serological pipette
- Nominal Capacity: 25 mL
- Construction Material: Polystyrene (PS)
- Material Compliance: USP Class VI, as stated by DWK
- Supplied Sterility: Sterile
- Sterilization Method: Gamma irradiation
- Packaging Format: Individually wrapped
- Individual Wrapper: Paper/plastic peel-open packaging
- Calibration: To deliver (TD)
- Manufacturer Accuracy Statement: ±2% of nominal capacity
- Volumetric Tolerance: ±0.5 mL
- Graduation Interval: 0.2 mL
- Negative Graduations: 10 mL
- Graduation Format: Bidirectional; ascending and descending scales
- Manufacturer-Listed ASTM Classification: Class A
- Color-Coded Band: Red in current DWK SKU specification
- Upper Plug: Plugged; manufacturer brochure describes cotton plug
- Tip Design: Standard serological pipette; no wide-tip designation for this SKU
- Intended Service: Single use
- Primary Applications: Cell culture, tissue culture, and general laboratory liquid transfer
- Manufacturer Shelf Pack Quantity: 50 pipettes
- Manufacturer Case Quantity: 200 pipettes
- Purchase Unit: Case (CS)
- Supplier Country-of-Origin Record: China
- Supplier Inventory Classification: Made to Stock (MTS)
- Shipping and Storage: Room temperature, unopened product
- Expiration: Check the labeled expiry date; no fixed shelf-life duration established by the reviewed SKU record
Where WHEATON Sterile Serological Pipettes Fit in Laboratory Workflows
Serological pipettes are commonly used to transfer measured volumes of culture media, buffers, prepared solutions, and other compatible laboratory liquids. The 25 mL capacity is useful when a workflow requires larger-volume transfers than are practical with many manual micropipettes.
The individually wrapped sterile format supports controlled handling in cell culture and other contamination-sensitive applications. Each unit can be opened as needed rather than exposing a bulk pack of pipettes during repeated retrieval.
Graduations are readable from both ascending and descending directions, supporting the laboratory's selected measurement technique. The clear polystyrene body provides visibility of the liquid level, while the plugged upper end supports appropriate handling with a compatible pipette controller.
Application qualification: Sterile packaging does not automatically establish suitability for every pharmaceutical aseptic process, direct patient use, or specific analytical method. Confirm the required volume tolerance, sample compatibility, sterility documentation, and handling procedure for the intended application.
About the Manufacturer:
DWK Life Sciences supplies laboratory glassware, plasticware, sample containers, and liquid-handling products under brands including WHEATON®, KIMBLE®, KIMAX®, and DURAN®.
The WHEATON sterile disposable serological pipette range includes multiple capacities and packaging options. The 56900 series consists of individually wrapped pipettes; separate 56800 and 56700 series products use multipack and canister packaging, respectively. Exact manufacturer part numbers distinguish capacities, graduation intervals, and packaging quantities.
WHEATON 56900-25210 Features:
- 25 mL nominal transfer capacity
- Clear polystyrene construction compliant with manufacturer-stated USP Class VI material requirements
- Sterilized by gamma irradiation
- Individually wrapped in peel-open paper/plastic packaging
- Calibrated to deliver (TD)
- Manufacturer-specified ±0.5 mL tolerance at nominal capacity
- 0.2 mL graduation intervals
- Bidirectional ascending and descending graduation scales
- 10 mL negative graduation extension
- Red band in the current DWK product specification
- Upper plug to support contamination control during appropriate handling
- ASTM Class A designation in DWK's current product data
- Manufacturer case of 200 with 50 per shelf pack
- Single-use design for sterile laboratory workflows
WHEATON 56900-25210 Benefits:
- Ready for sterile workflows: Gamma irradiation and individual packaging support aseptic handling when the wrapper is intact and the product remains within its labeled expiry.
- Convenient 25 mL capacity: Suitable for common culture-media and laboratory solution transfer volumes.
- Defined volumetric performance: A published ±0.5 mL nominal-capacity tolerance supports product selection against method requirements.
- Readable scales: Clear bidirectional markings allow users to follow ascending or descending volume readings.
- Extended graduated range: Negative graduations provide additional marked volume beyond the main scale for appropriate laboratory procedures.
- Clear material: Transparent polystyrene enables observation of the liquid meniscus during pipetting.
- Individual sterile access: Paper/plastic peel wrappers support dispensing one unit at a time.
- Practical case packaging: A 200-count case with 50-count shelf packs simplifies laboratory replenishment.
Common Applications:
- Mammalian cell culture media transfers
- Tissue culture laboratory workflows
- Preparation and distribution of compatible laboratory media
- Transfer of buffered solutions and laboratory reagents
- Cell suspension handling where pipette geometry and material are suitable
- Research and development laboratory liquid handling
- Biotechnology and life science laboratory procedures
- General laboratory sampling and measured transfers
- Repeated individually dispensed pipetting tasks requiring sterile single-use consumables
Best-Practice Use:
- Verify the SKU: Confirm 56900-25210, 25 mL capacity, 0.2 mL increments, and individual packaging.
- Check the expiry: Review the labeled expiration and batch identification before sterile use.
- Inspect the wrapper: Do not use units with damaged, compromised, or previously opened sterile packaging.
- Open aseptically: Peel the wrapper according to the facility's contamination-control procedure.
- Use an appropriate controller: Attach a compatible pipette aid or controller; never mouth-pipette.
- Confirm fluid compatibility: Evaluate polystyrene against the liquid and its operating temperature.
- Read graduations correctly: Follow the laboratory's chosen ascending or descending scale and meniscus-reading method.
- Observe TD calibration: Deliver the required volume according to the applicable pipette procedure rather than assuming a calibrated-to-contain designation.
- Check measurement suitability: Consider the ±0.5 mL nominal tolerance and the required accuracy of the procedure.
- Control contamination: Avoid contact between the tip, wrapper exterior, and nonsterile surfaces.
- Prevent over-aspiration: Follow pipette-controller procedures and avoid allowing liquid to reach the plug or controller.
- Do not reuse: Discard after use under the facility's approved waste and contamination-control procedures.
- Do not autoclave: Do not attempt to heat-reprocess this disposable polystyrene pipette.
Selection Notes (25 mL Pipettes & Packaging Formats)
- 56900-25210: 25 mL, sterile, individually wrapped, 0.2 mL graduations, 200/case; this product.
- 56800-25210: Separate 25 mL sterile multipack configuration, 200/case; manufacturer currently identifies this SKU as discontinued with limited stock.
- 56900-10110: Individually wrapped 10 mL serological pipette, 0.1 mL graduations, 200/case.
- 56900-50510: Individually wrapped 50 mL serological pipette, 0.5 mL graduations, 100/case.
- Individual vs. Multipack: The 56900 series uses individual paper/plastic peel packaging; the 56800 series uses plastic bag multipacks.
- 25 mL vs. 10 mL: Select the size based on liquid transfer volume, required tolerance, available pipette controller, and laboratory procedure.
- Graduations vs. Tolerance: The 0.2 mL scale interval is not the same as the ±0.5 mL nominal-capacity tolerance.
- Negative Graduations: The additional 10 mL markings do not create an independently certified nominal 35 mL pipette.
- Color Band: Current DWK product data specify red; historical brochures differ. Confirm a color-dependent SOP directly with DWK if necessary.
Important Sterility, Accuracy & Chemical Compatibility Considerations
DWK identifies 56900-25210 as sterile following gamma irradiation. Sterility depends on the integrity of the supplied wrapper, appropriate storage and handling, and use within the labeled expiration date. Opening or damaging the sterile barrier can compromise the product's original sterile status.
The pipette is calibrated to deliver (TD). Its published nominal-capacity tolerance is ±0.5 mL at 25 mL, matching the manufacturer's general ±2% statement. Neither the 0.2 mL graduation interval nor the presence of negative graduations establishes a smaller tolerance at every reading.
The pipette body is polystyrene, which has important limitations with certain organic solvents, concentrated chemicals, and heat. Do not assume universal chemical compatibility or autoclave suitability. Evaluate the intended sample and working conditions before use.
DWK manufacturer brochures describe additional controls, including production in an ISO Class 8 cleanroom, SAL 10-6, RNase/DNase-free properties, and non-cytotoxic performance. For regulated or highly sensitive applications, request current lot-specific documentation. Historical brochures also contain conflicting color-band and non-pyrogenic numerical information; these differences require confirmation before making a quantitative customer claim.
Manufacturer Documentation:
Related WHEATON Sterile Serological Pipettes
Individually Wrapped WHEATON 56900 Series
- 56900-5110: 5 mL, 0.1 mL graduations, 200/case
- 56900-10110: 10 mL, 0.1 mL graduations, 200/case
- 56900-25210: 25 mL, 0.2 mL graduations, 200/case
- 56900-50510: 50 mL, 0.5 mL graduations, 100/case
Alternative Packaging
- 56800-25210: 25 mL, sterile multipack, 200/case; manufacturer identifies limited remaining availability
Other manufacturer numbers are separate products and may use different inner-pack quantities, color bands, graduation intervals, or packaging formats. Contact SOSCleanroom to confirm current availability and suitable substitutions.
Notes: Open The Technical Vault for detailed information on WHEATON® 56900-25210, including gamma sterility, TD calibration, ±0.5 mL tolerance, negative graduations, polystyrene compatibility, individual packaging, manufacturer quality documentation, and product-family comparisons.
SOSCleanroom supports laboratory and critical-environment procurement with specialty consumables, technical product identification, and responsive customer service. For pricing, current availability, or manufacturer documentation, email Sales@SOSsupply.com or call (214) 340-8574.
Product page updated: October 29, 2026 (SOS Technical Staff)
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