CAS 5001-72-9
:Direct Red 31
Description:
Direct Red 31, with the CAS number 5001-72-9, is a synthetic azo dye commonly used in various applications, including textiles, food, and cosmetics. This dye is characterized by its vibrant red color, which is attributed to the presence of azo groups (-N=N-) in its molecular structure. Direct Red 31 is water-soluble, making it suitable for use in aqueous dyeing processes. It exhibits good lightfastness and washfastness, although its stability can vary depending on the specific conditions of use. The dye is often evaluated for its safety and environmental impact, as some azo dyes can release carcinogenic amines under certain conditions. Regulatory agencies may impose restrictions on its use in consumer products, particularly in cosmetics and food items. Overall, Direct Red 31 is valued for its coloring properties, but its application must be managed carefully to ensure compliance with safety standards.
Formula:C32H23N5O8S2·2Na
InChI:InChI=1S/C32H23N5O8S2.2Na/c38-31-25-13-11-23(15-19(25)17-27(46(40,41)42)29(31)36-34-21-7-3-1-4-8-21)33-24-12-14-26-20(16-24)18-28(47(43,44)45)30(32(26)39)37-35-22-9-5-2-6-10-22;;/h1-18,33,38-39H,(H,40,41,42)(H,43,44,45);;
InChI key:InChIKey=HBCTXOSBEYAALJ-UHFFFAOYSA-N
SMILES:OC=1C2=C(C=C(S(=O)(=O)O)C1N=NC3=CC=CC=C3)C=C(NC4=CC5=C(C=C4)C(O)=C(N=NC6=CC=CC=C6)C(S(=O)(=O)O)=C5)C=C2.[Na]
Synonyms:- 2-Naphthalenesulfonic acid, 7,7'-iminobis(4-hydroxy-3-(2-
- 2-Naphthalenesulfonic acid, 7,7'-iminobis(4-hydroxy-3-(2-phenyldiazenyl)-, sodium salt (1:2)
- 2-Naphthalenesulfonic acid, 7,7'-iminobis(4-hydroxy-3-(phenylazo)-, disodium salt
- Aizen Direct Rhoduline Red BH
- Amanil Rhoduline Red B
- Atlantic Brilliant Red 12B
- Atul Direct Red 12B
- Azine Fast Red 12BK
- Belamine Fast Pink G
- Belamine Red 12B
- Benzanil Rose B
- Benzo Rhoduline Red B
- Benzo Rhoduline Red BA-CF
- Chloramine Rose B
- Chlorazol Rose B
- Colonal Red 7B
- Cresotine Pink 3B
- Diacotton Rhoduline Red B
- Diamine Rhoduline Red B
- Diaphtamine Red 12B
- Diazamine Fast Purpurine
- Diazol Rose R
- Direct Brilliant Red B
- Direct Pink 12B
- Direct Pink 3B
- Direct Pink 5B
- Direct Pink EG
- Direct Red 12B
- Direct Red M 12B
- Direct Rhoduline Red B
- Direct Rose RW
- Direct Safranine RW
- Disodium 7,7'-iminobis(4-hydroxy-3-(phenylazo)naphthalene-2-sulphonate)
- Einecs 225-669-8
- Enianil Fast Brilliant Red 12B
- Erie Brilliant Red 12B
- Fenamin Red B
- Kayaku Direct Rhoduline Red B
- Libia Red 12B
- Mitsui Direct Brilliant Red B
- Nippon Fast Red BB
- Phenamine Rhoduline Red B
- Pink 12B
- Pontamine Red 12B
- Tertrodirect Pink DR
- Vondacel Red 12B
- disodium (3E,3'E)-7,7'-iminobis[4-oxo-3-(2-phenylhydrazinylidene)-3,4-dihydronaphthalene-2-sulfonate]
- C.I. 29100
- C.I.Direct Red 31
- C.I. Direct Red 31, disodium salt
- See more synonyms
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Found 2 products.
2-Naphthalenesulfonic acid, 7,7'-iminobis[4-hydroxy-3-(phenylazo)-,disodium salt
CAS:Formula:C32H23N5NaO8S2Molecular weight:692.6735
