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CAS 2829-43-8

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Direct Red 75

Description:
Direct Red 75, with the CAS number 2829-43-8, is a synthetic azo dye commonly used in various applications, including textiles, paper, and food coloring. This dye is characterized by its vibrant red hue and excellent lightfastness, making it suitable for applications where color stability is essential. It is soluble in water, which allows for easy application in dyeing processes. The chemical structure of Direct Red 75 features azo (-N=N-) linkages, which are typical of many synthetic dyes, contributing to its color properties. However, like many azo dyes, it may raise concerns regarding environmental and health impacts, particularly regarding potential toxicity and allergenic effects. Therefore, its use is often regulated in certain applications, especially in food and cosmetics. Overall, Direct Red 75 is valued for its strong coloring ability and versatility, but users must be aware of safety guidelines and regulations governing its application.
Formula:C33H26N8O15S4·4Na
InChI:InChI=1S/C33H26N8O15S4.4Na/c34-21-5-1-15-9-19(57(45,46)47)13-25(42)29(15)31(21)40-38-23-7-3-17(11-27(23)59(51,52)53)36-33(44)37-18-4-8-24(28(12-18)60(54,55)56)39-41-32-22(35)6-2-16-10-20(58(48,49)50)14-26(43)30(16)32;;;;/h1-14,42-43H,34-35H2,(H2,36,37,44)(H,45,46,47)(H,48,49,50)(H,51,52,53)(H,54,55,56);;;;
InChI key:InChIKey=RQYFVLJXAQMSHI-UHFFFAOYSA-N
SMILES:N(=NC1=C(S(=O)(=O)O)C=C(NC(NC2=CC(S(=O)(=O)O)=C(N=NC=3C4=C(C=C(S(=O)(=O)O)C=C4O)C=CC3N)C=C2)=O)C=C1)C=5C6=C(C=C(S(=O)(=O)O)C=C6O)C=CC5N.[Na]
Synonyms:
  • (6E)-6-imino-5-[2-(4-{[(4-{2-[(2E)-2-imino-8-oxo-6-sulfo-2,8-dihydronaphthalen-1-yl]hydrazino}-2-sulfophenyl)carbamoyl]amino}-3-sulfophenyl)hydrazino]-4-oxo-4,6-dihydronaphthalene-2-sulfonic acid
  • (6E)-6-imino-5-[2-(4-{[(4-{2-[(2E)-2-imino-8-oxo-6-sulfo-2,8-dihydronaphthalen-1-yl]hydrazino}-3-sulfophenyl)carbamoyl]amino}-2-sulfophenyl)hydrazino]-4-oxo-4,6-dihydronaphthalene-2-sulfonic acid
  • 2-Naphthalenesulfonic acid, 5,5′-[carbonylbis[imino(2-sulfo-4,1-phenylene)-2,1-diazenediyl]]bis[6-amino-4-hydroxy-, sodium salt (1:4)
  • 2-Naphthalenesulfonic acid, 5,5′-[carbonylbis[imino(2-sulfo-4,1-phenylene)azo]]bis[6-amino-4-hydroxy-, tetrasodium salt
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  • See more synonyms
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