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Sodium hydroxide, commonly known as caustic soda, caustic soda, and caustic soda, is a strong alkali with strong corrosiveness, generally in the form of flakes or blocks, easily soluble in water (exothermic when dissolved in water) and forms an alkaline solution , And also deliquescent, easy to absorb water vapor (deliquescent) and carbon dioxide (deterioration) in the air, you can add hydrochloric acid to check whether it is deteriorating.

my country's "Sanitary Standards for the Use of Food Additives" (GB 2920-1996) stipulates that it can be used as a processing aid and used in appropriate amounts according to production needs.

The current standard GB1886.20-2016 replaces GB5175-2008 "Food Additive Sodium Hydroxide". Compared with GB5175-2008, the main changes of this standard are as follows: The name of the standard is revised to "National Food Safety Standard Food Additive Sodium Hydroxide".

Food additive sodium hydroxide (solid)