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
Product Code. |
01052 |
Grade |
|
Purity |
CAS No. |
60-11-7 | |
Molecular Formula |
C14H15N3 |
Molecular Weight |
225.30 |
H.S.Code |
2927.00900 |
Shelf Life |
60 Months |
Physical Properties
| Physical state at 20 °C |
Solid |
Colour |
Yellow powder |
Melting point/ Freezing point [°C] |
111 °C |
Packaging
Specification
| 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 (lmax; 0.005%; ethanol; calculated on dried substance) | 1100 - 1300 |
| Loss on drying (40°C; 1 hpa) | Max. 5.0% |
Safety Information and Hazard Symbols
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