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Indigo carmine, C.I. 73015, Reag. Ph Eur

- Synonyms: Indigo-5,5'-disulfonic acid disodium salt, Acid Blue 74
- C16H8N2Na2O8S2
- M = 466,35 g/mol
- CAS [860-22-0]
- EINECS-No.: 212-728-8
- Solub. in water: (25 ºC): 10 g/l
- LD 50 (oral, rat): > 2000 mg/kg
- GHS-signal word: Warning
- GHS-H sentences: H302
- GHS-P sentences: P264 - P270 - P301+P312 - P330 - P501a
- Tariff number: 3204 12 00 00
- Applications: colouring agent (microscopy), for pharmaceutical use, in food industry, for the detection of: nitrates, chlorates.

SPECIFICATIONS
assay: min. 85 %
Identification A: passes test
Identification B: passes test
insoluble in water: max. 0,2 %
secondary colorants: max. 1,0 %
other organic compounds: max. 0,5 %
unsulfonated primary aromatic amines (as aniline): max. 0,01 %:
ether extractable substances (neutral conditions): max. 0,2 %
arsenic (As): max. 3 ppm
lead (Pb): max. 10 ppm
mercury (Hg): max. 1 ppm
cadmium (Cd): max. 1 ppm
heavy metals (as Pb): max. 40 ppm