Wide mouth reagent bottleIt is a commonly used container in laboratories, mainly used for storing and packaging solid reagents, samples, etc. The materials are diverse, mainly including glass and plastic.
Glass, plastic; Glass stopper, rubber stopper; Wide mouth, narrow mouth; Brown, transparent; There are various classification methods such as ground mouth and no ground mouth.
Hydrofluoric acid should be stored in plastic bottles, while other reagents are generally stored in glass bottles.
Alkaline substances such as sodium hydroxide and water glass should be sealed with rubber plugs, and glass plugs should not be used. Organic solvents such as benzene and toluene should not be plugged with rubber stoppers when using glass stoppers.
Wide mouthed bottles are used to hold solid reagents, while narrow mouthed bottles are used to hold liquid reagents. Liquid bromine is stored in a fine mouthed bottle, and water is added to the liquid surface to seal it. The bottle mouth is then sealed with wax. A small amount of white phosphorus should be stored in water.
Reagents that are prone to decomposition or deterioration under light are usually stored in brown bottles, such as nitric acid, silver nitrate, chlorine water, etc. Place in a cold and dark place. Generally, colorless bottles are used for other purposes.
Grinding mouthed stoppered bottles (with a frosted design inside the bottle mouth) can maintain sealing and prevent reagent moisture absorption and concentration changes. A dropper with a ground mouth dropper is called a dropper. Reagents that deteriorate due to absorption of carbon dioxide or water vapor should be sealed and stored (such as NaOH, lime water, bleach, water glass, Na2O2, etc.). Low boiling point organic compounds such as concentrated hydrochloric acid, ammonia water, iodine, benzene, toluene, etc. are stored in bottles sealed with plastic caps and placed in a cold and dark place.
Among the reagents that are prone to oxidation and deterioration, active potassium, sodium, calcium, etc. are stored in kerosene; Potassium iodide, ferrous sulfide, sodium sulfate, etc. are usually stored as solids but not as solutions; When using ferrous sulfate or ferrous oxide solution, add a small amount of iron powder or iron nails inside.