Classification And Characteristics Of Reagent Bottle

Reagent bottle is a glass bottle or plastic bottle containing reagents, and there are various classification methods according to color, shape, and use.

Classification:

Glass, plastic; glass stopper, rubber stopper; wide mouth, narrow mouth; brown, transparent; ground mouth, non-grinding mouth, and other classification methods.

Hydrofluoric acid should be stored in plastic bottles, and other reagents are generally used in glass bottles.

For alkaline substances such as sodium hydroxide and water glass, rubber stoppers should be used, and glass stoppers should not be used. Glass stoppers should not be used for organic solvents such as benzene, toluene, and ether.

Wide-mouth bottles are used to hold solid reagents, and narrow-mouth bottles are used to hold liquid reagents. The liquid bromine is stored in a narrow-mouth bottle, water is added to the liquid surface to make it "water-sealed", and the bottle mouth is sealed with wax. Small amounts of white phosphorus should be kept in water.

Reagents that are easily decomposed or deteriorated when exposed to light are generally stored in brown bottles, such as nitric acid, silver nitrate, chlorine water, etc. Store in a cool dark place. Others generally use colorless bottles.

The ground stopper bottle (the inside of the bottle is frosted) can keep the seal and prevent the reagent from absorbing moisture and changing the concentration. The bottle with a ground 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, bleaching powder, water glass, Na2O2, etc.). Concentrated hydrochloric acid, ammonia water, iodine, benzene, toluene, ether, and other low-boiling organics are kept in the bottle, sealed with a plastic cap, and placed in a cool dark place.

Among the reagents that are easily oxidized and deteriorated, active potassium, sodium, calcium, etc. are stored in kerosene; potassium iodide, ferrous sulfide, sodium sulfate, etc. are usually stored as solids instead of solutions; when using ferrous sulfate or ferrous oxide solutions, Put a small amount of iron powder or nails.

The vast majority of laboratories in the world use reagent bottles produced by German companies, also known as blue cap reagent bottles because their caps are blue plastic.

Note: Most reagent bottles are not heat resistant.

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