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Classification of Reagent Bottles by Mouth Size
Created on 07.13
**Author: Original from Internet
Reagent bottles are containers used to store various types of chemical reagents. Reagents come in a wide variety of types and forms, such as granules, powders, and liquids, and different types have different requirements for their packaging containers. Based on the size of the mouth, reagent bottles are classified into wide-mouth and narrow-mouth bottles. These two types of bottles each have their own characteristics:
Wide-mouth bottles: The opening of a wide-mouth bottle is larger than that of a standard bottle and is primarily used for storing solid reagents; this wide opening facilitates easy access to the contents. The bottles come in white and brown; brown bottles are used to store reagents that require protection from light. The body of the bottle is generally made of polypropylene, a material that is resistant to corrosion by acids, alkalis, saline solutions, and various organic solvents. It possesses chemical resistance, heat resistance, electrical insulation, high mechanical strength, and good wear resistance during processing.
Narrow-necked bottles: The opening of a narrow-necked bottle is relatively small, approximately one-third the area of a standard bottle’s opening. This design prevents the contents from spilling out easily and minimizes the evaporation of liquid reagents, making them particularly suitable for storing liquid reagents—hence the name ‘narrow-necked bottle’. Narrow-mouth bottles are generally available in two colors: transparent or brown. The color determines their intended use: transparent bottles are used to store general reagents, whilst brown bottles are used to store reagents that require protection from light, such as nitric acid and silver nitrate.
The designs of wide-mouth and narrow-mouth bottles are intended to ensure optimal storage conditions for reagents and to facilitate their subsequent retrieval by laboratory staff. This design is also a fundamental reflection of how reagent bottles are continually updated to meet market demands.
With the development of high-tech fields such as biotechnology, the demand for reagent bottles is growing daily, resulting in a large volume of waste reagents. As many reagents are flammable or explosive, how should waste liquids and discarded reagent bottles be disposed of?
Treatment of chemical waste liquids:
◆ Discarded chemical substances from laboratories, as well as toxic and hazardous waste liquids and residues generated during experiments, must not be poured indiscriminately into drains; they must be neutralised to meet waste liquid discharge requirements.
◆ Other inorganic waste liquids should undergo pre-treatment; hazardous substances must be precipitated before discharge to ensure compliance with discharge standards.
◆ Waste liquids containing silver, chromium or other precious metals and heavy metals must be stored separately, with recovery and reuse prioritised wherever possible; they must not be discharged indiscriminately.
◆ Chemicals that are unstable, prone to decomposition or deterioration, or Class 1 flammable chemicals—which may undergo chemical reactions upon contact with moisture or water—must be registered and booked in advance for centralised disposal.
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