Reagent Bottle N/M

Description

A Narrow Mouth (N/M) Reagent Bottle is the standard vessel for the long-term storage and dispensing of liquid reagents, chemicals, and culture media. The reduced diameter of the neck (Narrow Mouth) is specifically designed to minimize evaporation and prevent accidental spills, making it ideal for volatile or hazardous liquids.

Key Product Features

• Borosilicate 3.3 Glass: Manufactured from high-expansion glass providing maximum chemical resistance. It is inert and will not leach into the stored chemicals, maintaining high reagent purity.

• Narrow Neck Design:

  • Minimized Surface Area: Reduces the rate of evaporation for volatile solvents.

  • Controlled Pouring: Allows for a more precise, steady stream when transferring liquids to smaller vessels like test tubes or burettes.

• Standard Ground-Glass Stopper: Features a precision-ground neck and an interchangeable glass stopper. This ensures an airtight seal, protecting the contents from atmospheric moisture and carbon dioxide.

• Autoclave-Safe: Both the bottle and the glass stopper are fully sterilizable by autoclave, making them suitable for biological and pharmaceutical applications.

• High-Contrast Graduation: Most models feature permanent white enamel volume markings for easy inventory management.

Technical Specifications

Primary Applications

• Acid/Base Storage: Ideal for storing concentrated acids (like HCl or $H_2SO_4$) where a secure seal is critical to prevent corrosive fumes from escaping.

• Volatile Solvents: The narrow mouth significantly slows the loss of liquids like ethanol, acetone, or hexane.

• Standard Solutions: Used to store prepared standard solutions for titration, ensuring the concentration remains stable over time.

• Light-Sensitive Chemicals: Available in Amber Glass variants to protect chemicals that decompose under UV or ambient light (e.g., Silver Nitrate).

Usage & Safety Tips

• “Frozen” Stoppers: If storing alkaline solutions (e.g., Sodium Hydroxide), glass-on-glass stoppers can sometimes seize. In these cases, using a thin PTFE sleeve or a plastic-capped reagent bottle is recommended.

• Pressure Buildup: Never tighten the stopper immediately after autoclaving; allow the liquid and bottle to cool slightly to prevent a vacuum from forming or the bottle from cracking.

• Inverting: When using glass stoppers, do not rely on them for 100% leak-proof inversion unless the joint is verified as vacuum-tight.

Narrow Mouth (N/M) vs. Wide Mouth (W/M)

While Wide Mouth bottles are better for powders and thick viscous liquids because they allow for spoon/spatula access, the Narrow Mouth is the superior choice for liquids. It provides better pouring control and a more secure atmospheric barrier, which is essential for preserving the integrity of liquid reagents.