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Dimethyl Yellow (pH Indicator)
C.I.No.11020 p-Dimethylaminoazobenzene, 4-Dimethylaminoazobenzene, N,N-Dimethyl-4-phenylazoaniline, N,N-Dimethyl-4-aminoazobenzene, Butter Yellow, Solvent Yellow 2 ; ph 2.9 - 4.0 Red to Orange Yellow