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  • laboratory boroslllicate glass reagent bottle with narrow mouth opeining and stopper

Narrow Mouth Reagent Bottle 250 mL with Plastic Stopcock

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Our Narrow Mouth Reagent Bottle 250 mL is the ideal solution for precise liquid storage and controlled dispensing in compact laboratory setups. Crafted from high-clarity Borosilicate 3.3 glass, this bottle is engineered for maximum chemical resistance. The integrated Plastic (PTFE/PP) Stopcock provides an airtight seal and allows for meticulous, drop-by-drop dispensing of high-value reagents without the risk of “seizing” or leaking.


Key Features

  • Compact 250 mL Capacity: Perfectly sized for small-batch chemical storage, titration reagents, and specialized analytical solutions.

  • Premium Borosilicate 3.3 Glass: Superior resistance to thermal shock and chemical erosion; safe for use with strong acids and volatile solvents.

  • Precision Plastic Stopcock: The high-grade PTFE/PP stopcock offers smooth rotation and a leak-proof seal, requiring no grease for operation.

  • Evaporation Protection: The narrow mouth design significantly reduces the surface area of the liquid exposed to air, preserving the stability of sensitive reagents.

  • Permanent Volumetric Markings: Features durable, fired-on white enamel graduations for quick volume assessment at a glance.


Technical Specifications

Specification Details
Capacity 250 mL
Bottle Material Borosilicate 3.3 Glass
Stopcock Material High-Grade PTFE / Polypropylene
Mouth Type Narrow Mouth
Thermal Resistance Up to 500°C (Glass Body)
Chemical Resistance Excellent (Acids, Bases, and Solvents)
Sterilization Fully Autoclavable

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