This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of 2,6-naphthalenedicarboxylic acid. This standard applies to 2,6-naphthalenedicarboxylic acid produced through liquid phase oxidation using 2-alkyl-6-acylnaphthalene or 2,6-dialkylnaphthalene as raw material, and then decolorized, recrystallized and separated by activated carbon. , high purity 2,6-naphthalenedicarboxylic acid obtained after drying. The English name of 2,6-naphthalenedicarboxylic acid is: 2,6-naphthalenedicarboxylic acid, and the English abbreviation is: 2,6-NDA. The molecular formula of 2,6-naphthalenedicarboxylic acid: C12H8O4, relative molecular mass: 216.19 (according to the 2009 international relative atomic mass).