The regulation stipulates the method of test for 31 hair dyes in cosmetics, including Basic blue 7, Basic red 51, Disperse black 9, Basic orange 31, Basic yellow 87, HC blue No. 16, HC yellow No. 5, Basic blue 99, 1,3-Bis-(2,4-diaminophenoxy)propane, 2,6-Dimethoxy-3,5-pyridinediamine, etc.
