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4-(Dimethylamino)-azobenzene, for analysis, ExpertQ®

- Synonyms: Methyl yellow, Dimethyl yellow, Solvent yellow 2
- C14H15N3
- M = 225,30 g/mol
- CAS [60-11-7]
- EINECS-No.: 200-455-7
- Solub. in water: (20 ºC): almost insoluble
- Melting point: 113 - 117 ºC
- LD 50 (oral, rat): 200 mg/kg
- ADR: 6.1 T2 III UN 2811
- IMDG: 6.1 III UN 2811
- IATA/ICAO: 6.1 III UN 2811
- GHS-signal word: Danger
- GHS-H sentences: H301 - H351 - H317
- GHS-P sentences: P261 - P280 - P301+P310 - P321 - P405 - P501a
- Tariff number: 2927 00 00 90
- Applications: indicator, analytical chemistry.
- Appearance: Orange-orange brown powder

SPECIFICATIONS
identity (IR-spectrum): passes test
pH range (red to yellow): 3,0 - 4,0
Absorption max l1 (buffer pH 3,0) : 508 - 511 nm
Absorption max l2 (buffer pH 4,0) : 455 - 460 nm
Absorption max l3 (ethanol) : 403 - 407 nm

ethanol, on dried sample): 1100 - 1300
loss on drying (105 ºC): max. 5 %