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Reagent Bottles
- Mar 06, 2018 -


Storage bottles come in various sizes, the most common being 5 ml, 10 ml, 20 ml, 25 ml, 30 ml, 40 ml, 50 ml, 100 ml, 200 ml, 250 ml, 500 ml, 1000 ml (1 liter), 2000 ml (2 liter), 2500 ml (2.5 liter), 4000 ml (4 l) and 5000 ml (5 liter). Larger bottles exist, but are less commonly used, as they are harder to handle properly. For storing large volumes of liquid, kegs or barrels tend to be more often used, while bags are sometimes employed for bulk solid materials that don't react with paper or plastic materials.

Glass bottles intended for liquids tend to be screwed and present a Teflon (PTFE) seal, while the ones for powders tend to be either glass with plastic lid or ground glass. A relative chemically inert foam plastic is used as sealant for most plastic bottles, though these seals are not as good as PTFE ones and are unsuitable for very corrosive and volatile reagents. For plastic they are both screwed, while metal is rarely screwed due to corrosion issues, though aluminium bottles do exist. Metal bottles tend to have the lid made from a different material, usually plastic (PE).

Some transparent bottles tend to be graduated, like this model, but this is less common with original reagent amber bottles. Plastic containers have no graduations, nor do metal ones. However most bottles have markings for the volume of liquid they're designed to store.

A reagent bottle must resist chemical attack, have a good lid, good mechanical and thermal resistance, should be sturdy and easy to handle. The lid should be made of the same material the bottle is made of (though in case of glass bottles this only works for ground glass) or inert plastic. A sealant, like PTFE is a good choice if volatile or air-sensitive reagent is kept.


Plastic containers tend to be made of PE or rarely PTFE (mainly for very corrosive reagents) and are generally suited for storing salts or solid reagents with little reactivity, or which do not attack plastic. Thick all-PTFE or all-PE bottles are used for storing hydrofluoric acid.

Plastic containers will turn brittle if exposed to strong sunlight or other UV light source, so it's best to keep them away from light. However, even with limited light exposure, they will slowly degrade in contact with air. Most plastic containers change color and become brittle after at least 10-20 years of use and need to be replaced (except for PTFE).