VWR Serological Glass Pipette 10 ml 250 Pipets

The VWR® Disposable Serological Pipette (Catalog Number 93000-680) is a specialized 10 mL liquid handling tool manufactured from borosilicate glass (conforming to ASTM E438, Type I, Class B standards). Unlike the ubiquitous polystyrene plastic pipettes found in most tissue culture labs, this glass variant is essential for chemical workflows involving aggressive organic solvents—such as acetone, chloroform, or toluene—that would otherwise dissolve, haze, or leach contaminants from standard plastic consumables.

Designed for precision and clear readability, these pipettes are calibrated "To Deliver" (TD) to the tip. They feature two rings near the top mouthpiece, indicating they are "blow-out" pipettes, meaning the final drop remaining in the tip must be expelled to achieve the full stated volume. The 10 mL capacity is marked with distinct 0.1 mL graduations printed in permanent enamel, often including negative graduations that allow for a total working volume slightly exceeding 10 mL. Each unit is supplied sterile and is fitted with a cotton plug at the top to protect the mechanical pipetting aid from fluid over-aspiration and cross-contamination.

While these pipettes are intended for single-use applications, their glass construction necessitates specific disposal protocols. Unlike plastic pipettes, they must be discarded in a rigid glass sharps container or a designated broken glass box rather than standard biohazard bags to prevent puncture injuries to laboratory waste handlers. This specific catalog number typically denotes a bulk-packed configuration (e.g., 25 per bag) rather than individually wrapped units, streamlining workflows in high-volume chemical hoods.