COA Center



DIMETHYL YELLOW pH Indicator grade

p-Dimethylaminoazobenzene, 4-Dimethylaminoazobenzene, N,N-Dimethyl-4-phenylazoaniline, N,N-Dimethyl-4-aminoazobenzene, Butter Yellow, Solvent Yellow 2


25 g (00025)

100 g (00100)

1PB1200060 1PB1200200
Article No. 03430 Grade pH Indicator grade
Purity CAS No. 60-11-7
Molecular Formula C14H15N3 Molecular Weight 225.30
H.S. Code 2927.0090 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour Yellow powder
Melting point/ Freezing point [°C] 111 °C


Appearance Yellow to orange brown powder Melting point 110 - 116°C
Transition range pH 2.9 to pH 4.0 Red to yellow Appearance of solution 0.1% solution in ethanol is clear
Absorption maxima in ethanol 403 - 407 nm Specific absorptivity A 1%/1cm (λmax; 0.005%; ethanol; calculated on dried substance) 1100 - 1300
Loss on drying (40°C; 1 hpa) Max. 5.0%

Safety Information and Hazard Symbols

Skull and Crossbones Health Hazard
Symbol: GHS06, GHS08
Signal Word: Danger
UN No.: 2811
IMCO Class No.: 6.1
Packing Group: III
Hazardous Statement: H301-H351
Precaution Statement: P281-P301 + P310
Revision Date: 07-Jun-2019

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