About Acid Red 33
Acid Red 33Synonym: 5-Amino-4-hydroxy-3-phenylazo-2,7-naphthalenedisulfonic acid disodium salt, Acid Red 33 disodium salt, Disodium 5-amino-4-hydroxy-3-(phenylazo)-naphthalene-2,7-disulfonate, Food Red 12Empirical Formula (Hill Notation): C16H11N3Na2O7S2Molecular Weight: 467.38CAS Number: 3567-66-6 grade analytical standard assay 97.0% (HPLC) form neat shelf life limited shelf life, expiry date on the label application(s) HPLC: suitable gas chromatography (GC): suitable format neat
FAQs of Acid Red 33:
Q: What is the molecular formula of Acid Red 33?
A: The molecular formula of Acid Red 33 is C16H11N3Na2O7S2.
Q: What is the molecular weight of Acid Red 33?
A: The molecular weight of Acid Red 33 is 467.38 grams (g).
Q: What is the purity level of Acid Red 33?
A: Acid Red 33 has a purity of 92.0%.
Q: What is the appearance of Acid Red 33?
A: Acid Red 33 appears as a dark reddish brown powder.
Q: What is the usage application of Acid Red 33 in hair dye formulations?
A: Acid Red 33 is used as a non-reactive dye up to an on-head concentration of 0.5% in non-oxidative hair dye formulations.
Q: Is Acid Red 33 approved for use in cosmetic products?
A: Yes, Acid Red 33 (CI 17200) is approved as a colorant in all cosmetic products under Directive 76/768/EC, Annex IV, Part 1, column 1.