Reagent Bottle narrow mouth(ASTM stopper)

A Reagent Bottle Narrow Mouth (ASTM Stopper) is a classic laboratory container designed for secure storage of reagents, solvents, acids, bases, and other chemicals. The bottle features a narrow neck to minimize evaporation and contamination, and it is sealed with a ground glass ASTM stopper that provides an airtight and chemically resistant closure. The bottle is typically made of borosilicate glass (Type 3.3), known for its excellent thermal resistance and chemical durability. The ASTM stopper is precision-ground to ensure a tight, leak-proof fit that prevents contamination and preserves reagent integrity. This stopper style follows ASTM (American Society for Testing and Materials) standards, which specify the size and taper for compatibility with standard narrow-mouth bottles. Narrow mouth reagent bottles with ASTM stoppers are favored for long-term reagent storage where an air-tight seal is critical, such as in analytical chemistry, pharmaceutical labs, and environmental testing.

Technical Specification of Reagent Bottle narrow mouth(ASTM stopper)

• Material: Borosilicate glass 3.3 (high chemical and thermal resistance)

• Neck Type: Narrow mouth with ground glass joint compatible with ASTM stopper

• Stopper: Ground glass ASTM stopper, chemically resistant and reusable

• Volume Options: Common sizes include 50 mL, 100 mL, 250 mL, 500 mL, 1000 mL

• Temperature Range: Typically up to 140–160°C (autoclavable)

• Graduations: Usually no or minimal graduations due to narrow neck design

• Stopper Taper: ASTM standard taper (usually 19/22, 24/29 depending on bottle size)

• Chemical Resistance: Resistant to most acids, bases, solvents, and reagents

• Design Features:

  • Narrow neck minimizes exposure to air and contaminants

  • Precise ground glass stopper for leak-proof seal

  • Heavy-wall glass for durability