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See Chinese contents: GB 1886.349-2021 GB 1886.349-2021: National Food Safety Standard - Food Additives - Five carbon diacetal (also known as glutaraldehyde)
This Standard applies to the food additive five-carbon diacetal (also known as glutaraldehyde) obtained by that vinyl methyl ether or vinyl ethyl ether reacts with acrolein to form 2-alkoxy-3,4-dihydropyran, which is then hydrolyzed.
