GB 31604.21-2025: National food safety standard - Food contact materials and products - Determination of migration of benzoic acid, phthalic acid and trimellitic acid in food

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Scope

This Standard specifies the liquid chromatography method for the determination of
migration amount of benzoic acid, 1,2-benzenedicarboxylic acid (also known as
phthalic acid), 1,3-benzenedicarboxylic acid (also known as isophthalic acid), 1,4-
benzenedicarboxylic acid (also known as terephthalic acid), 1,3,5-benzenetricarboxylic
acid (also known as trimesic acid), 1,2,4-benzenetricarboxylic acid (also known as
trimellitic acid), and 1,2,3-benzenetricarboxylic acid (also known as hemimellitic acid)
in food contact materials and articles.
This Standard applies to the determination of migration amount of benzoic acid,
phthalic acid, isophthalic acid, terephthalic acid, trimesic acid, trimellitic acid, and
hemimellitic acid in food contact plastic materials and articles, food contact paper and
paperboard materials and articles, adhesives for food contact materials and articles, and
paintings and coatings for food contact.

Basic Data

Standard ID	GB 31604.21-2025 (GB31604.21-2025)
Description (Translated English)	National food safety standard - Food contact materials and products - Determination of migration of benzoic acid, phthalic acid and trimellitic acid in food
Sector / Industry	National Standard
Classification of Chinese Standard	C53
Word Count Estimation	11,151
Date of Issue	2025-09-02
Issuing agency(ies)	National Health Commission; State Administration for Market Regulation