The regulation specifies the test method for 15 preservatives in cosmetics, including benzoic acid, salicylic acid, 4-hydroxybenzoic acid, sorbic acid, dehydroacetic acid, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, isopropyl p-hydroxybenzoate, butyl p-hydroxybenzoate, isobutyl p-hydroxybenzoate, secbutyl p-hydroxybenzoate, o-cymen-5-ol, chlorphenesin, and phenoxyethanol.