Chemical reagent expiration date

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　　Chemical reagents are affected by external factors such as temperature, light irradiation, air and moisture during storage, transportation and sales, and are prone to physical chemistry such as deliquescence,mycin, discoloration, polymerization, oxidation, volatilization, sublimation and decomposition. Change, make it invalid and unusable. Therefore, reasonable packaging, proper storage conditions and transportation methods should be used to ensure that chemical reagents do not deteriorate during storage, transportation and sales. For some special requirements for storage and transportation, special requirements should be applied. Some chemical reagents have a certain shelf life and must be used when using.

　　The expiration date of a chemical reagent varies greatly depending on the chemical nature of the chemical. In general, a chemically stable substance has a longer shelf life and a simple storage condition.

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