7-Hydroxy-N,N,N-trimethylnaphthalen-2-aminium Hydroxide is an intermediate for the synthesis of 8-((4-Amino-3-nitrophenyl)diazenyl)-7-hydroxy-N,N,N-trimethylnaphthalen-2-aminium Chloride (A619180), which is used in the preparation of hair dyes and color intensifiers in cosmetics.
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