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Azo dyes, Pharmaceuticals

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Dyes (1)
PH indicators (1)

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Methyl red (493-52-7)  
methyl red, sodium salt  ·  C.I. Acid Red 2
Methyl red (2-(N,N-dimethyl-4-aminophenyl) azobenzenecarboxylic acid), also called C.I. Acid Red 2, is an indicator dye that turns red in acidic solutions. It is an azo dye, and is a dark red crystalline powder.
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Azo dyes
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