Thermo Scientific Serological Pipette 25 ml Sterile Sealed Case of 200 Pipets

Thermo Scientific™ Sterile Nunc™ Serological Pipettes, 25 mL (170357N) – Case of 200

The Thermo Scientific™ 170357N is an optical-grade, sterile liquid handling consumable engineered for precise fluid measurement, cell culture feeding, and reagent dosing within biological safety cabinets and cleanrooms. Fabricated from ultra-clear, 100% virgin polystyrene, this 25 mL serological pipette features a specialized **bidirectional graduation scale** alongside descending negative numbers to maximize fluid extraction capacity. Supplied as a commercial case of 200 individually paper/plastic peel-wrapped pipettes, this single-use model integrates a premium premium aerosol-blocking barrier plug, guaranteeing absolute sample purity while eliminating cross-contamination risks inside motorized pipetting controllers.

Technical Performance & Design

• High-Contrast Bidirectional Graduations: Outfitted with permanent, high-contrast black printed markings indicating ascending and descending volumetric values. This design streamlines fast aliquot counting while the **extra negative graduations** expand the total working volume beyond the nominal 25 mL mark.
• Aerosol-Blocking Filter Barrier: Equipped with a uniform, low-linting synthetic fiber filter plug securely fitted inside the upper neck. The hydrophobic filter acts as a physical shield, capturing liquid overflow and protecting the internal mechanism of automated pipet guns from aerosol tracking.
• Drip-Free Precision Tip Geometry: Designed with an optimized internal taper and a calibrated tip orifice. This geometric profile ensures a laminar, splash-free liquid stream, allowing researchers to dispense fluids droplet-by-droplet without meniscus lag or fluid hang-up.
• Paper-Plastic Peel Packaging: Every pipette is individually isolated inside a high-purity paper-backed plastic film wrapper. The peel-apart configuration allows for clean, fiber-free aseptic opening, minimizing external particle shedding when transferring tools into cell culture suites.

Product Specifications

• Catalog Number / MPN: 170357N (Nunc™ Serological Pipette Series)
• Primary Manufacturer: Thermo Fisher Scientific
• Nominal Volumetric Capacity: 25 mL
• Negative Volumetric Range: Calibrated up to an additional -8.0 mL capacity
• Graduation Increments: Calibrated in clear 0.2 mL intervals
• Material Chemistry: Crystal-grade, USP Class VI virgin polystyrene (PS) | Latex-free
• Color-Coding Matrix: Universal Magenta Color Banding on pipet neck and outer cartons for fast volume sort identification
• Sterility & Purity Status: Gamma irradiated (Sterile baseline); Certified Non-Pyrogenic, RNase-free, DNase-free, and Non-Cytotoxic
• Packaging Configuration: Case of 200 Pipettes (Individually paper-plastic wrapped units organized neatly in high-density dispenser cartons)

Key Benefits & Applications

• Aseptic Tissue Culture Media Feedings: The premier choice for cleanroom media replacement loops, cell splitting protocols, and buffer distribution in 150 cm² to 225 cm² culture flasks.
• High-Purity Bioprocessing Prep: Provides an inert, contaminant-free pathway for transferring cell suspensions, enzyme master mixes, or viral vectors without introducing leachable chemical toxins.
• **Universal Motorized Gun Alignment:** The standardized top-end mouthpiece diameter docks securely into all major automated pipet controller adapters, eliminating fluid weeping or unexpected tip wobbling.
• cgmp-Compliant Lot Traceability: Each individual paper/plastic wrapper is directly printed with the manufacturing lot code and expiry metric, simplifying institutional quality auditing and batch tracking.

Thermo Scientific™ and Nunc™ are registered commercial trademarks of Thermo Fisher Scientific Inc. Catalog number 170357N specifies the 25 mL paper/plastic individually wrapped configuration. For high-volume facility routines where rapid bench deployment is desired over standalone pouch isolation, alternative bulk plastic wrapped canister or alternative color-coded 10 mL and 50 mL configurations can be specified within the supply hub.