MUHWA 1000mL Borosilicate Glass Reagent Bottle — Wide Mouth with Ground Glass Stopper for Safe Chemical Storage
MUHWA 1000mL borosilicate glass reagent bottle is the classic laboratory vessel for preparing, storing, and dispensing chemical reagents, standard solutions, culture media, and buffers. Manufactured from high borosilicate 3.3 glass (ISO 3585 compliant), the bottle combines exceptional chemical durability with low thermal expansion — safe for autoclave sterilization, hot solution storage, and use with a wide range of aqueous and organic reagents. The wide mouth (~40-50mm opening) facilitates easy filling with powder funnels, insertion of magnetic stir bars, and pouring of viscous solutions. The precision-ground glass stopper provides an airtight, evaporation-proof seal for long-term storage of hygroscopic, volatile, or air-sensitive reagents. White enamel graduations are fired onto the glass — they will never fade, dissolve, or peel under any laboratory conditions.
Key Features
- 1000mL (1 Liter) Capacity — The most commonly used reagent bottle size for stock solutions and frequently accessed reagents. Graduated at 200, 400, 600, 800, and 1000mL.
- High Borosilicate 3.3 Glass — ISO 3585 compliant. CTE of 3.3 x 10-6/K provides excellent thermal shock resistance. Chemically resistant to acids (except HF), bases, salt solutions, and organic solvents.
- Wide Mouth Design — ~40-50mm opening for easy filling with spatulas and powder funnels, stir bar insertion, and spill-free pouring of viscous solutions.
- Precision Ground Glass Stopper — Individually matched to each bottle for airtight seal. Prevents evaporation, CO2 absorption, and contamination. Standard taper size.
- Permanent White Enamel Graduations — Fired-on ceramic graduations are chemically bonded to the glass. Resistant to solvents, acids, autoclave temperatures, and routine washing.
- Autoclavable (121C) — Safe for standard autoclave cycles. Always loosen stopper before autoclaving to allow pressure equalization.
Technical Specifications
| Parameter | Specification |
|---|
| Capacity | 1000 mL (1 liter) |
| Material | High borosilicate 3.3 glass (ISO 3585) |
| Closure | Ground glass stopper (standard taper, individually matched) |
| Mouth Style | Wide mouth (~40-50 mm opening) |
| Graduations | 200, 400, 600, 800, 1000 mL (white enamel) |
| Autoclavable | Yes (121C, 15 psi, 20 min; loosen stopper) |
| CTE | 3.3 x 10-6/K |
Applications
- Reagent and Standard Solution Storage — Store acids, bases, indicators, buffer stocks, and analytical standards with evaporation-proof seal.
- Culture Media Preparation — Prepare and store sterile LB broth, agar, SOC medium, and microbiological media. Autoclavable for in-bottle sterilization.
- HPLC Mobile Phase Storage — Store aqueous and organic HPLC solvents. Borosilicate glass is compatible with acetonitrile, methanol, and water-based buffers.
- General Buffer Storage — PBS, TBS, saline, Tris buffers, SDS-PAGE buffers. Wide mouth allows easy pouring into electrophoresis tanks.
- Teaching Laboratories — Durable, reusable reagent bottles for chemistry, biology, and biochemistry practical courses.
Frequently Asked Questions
Q: Can I autoclave with the stopper in place?
A: No. Always loosen or remove the stopper before autoclaving. A sealed bottle will develop dangerous internal pressure during heating. Cover the opening with aluminum foil, then replace the stopper after cooling.
Q: Are the stoppers interchangeable between bottles?
A: Stoppers are individually ground to fit each bottle. While same-taper stoppers may physically fit, the best seal is achieved with the original matched stopper. Each bottle and stopper are numbered for matching.
Q: Can I store strong alkalis (NaOH, KOH) long-term?
A: Borosilicate glass resists alkalis at room temperature for short-term storage. Concentrated (>2M) hot alkaline solutions will slowly etch glass over weeks to months. For long-term alkali storage, use polypropylene or PTFE bottles.
Q: Will the graduations fade?
A: No. The white enamel graduations are fired onto the glass at high temperature during manufacturing and are chemically bonded. They resist all common laboratory solvents, autoclaving, and detergent washing.
