Direct Red 81

CAS: 2610-11-9

Ref. 3D-CAA61011

Product Information

• Name: Direct Red 81
• Synonyms: 2-Naphthalenesulfonic acid, 7-(benzoylamino)-4-hydroxy-3-[2-[4-[2-(4-sulfophenyl)diazenyl]phenyl]diazenyl]-, sodium salt (1:2), 2-Naphthalenesulfonic acid, 7-(benzoylamino)-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-, disodium salt, Airedale Red KD, Aizen Primula Red 4BH, Amanil Fast Red 8BL, Amanil Fast Red 8BLW, Belamine Fast Red 8BL, Benzanil Fast Red K, Benzo Fast Red 8BL, Bordeaux EMBL, Calcodur Red 8BL, Chloramine Fast Red 5BL, Chloramine Fast Red K, Chlorantine Fast Red, Chlorantine Fast Red 5B, Chloroantine fast red 5B, Chrome Leather Red 5B, Dialuminous Red 4B, Diaphtamine Light Red 4B, Diazine Fast Red 8BK, Diazo Light Red 8BD, Diazol Light Red 8B, Diphenyl Fast 5BL Supra I Red, Diphenyl Fast Red 5BL, Diphenyl Fast Red 5BLN, Diphenyl Red 5B, Direct Fast Red 2S, Direct Fast Red 5B, Direct Fast Red 8BL, Direct Light Red 4B, Direct Light Red 8B, Direct Light Red M 8BL, Direct Lightfast Red 2S, Direct Lightfast Red 4BS, Direct Red 5B, Durazol Red 2B, Durazol Red 2BP, Eliamina Red 8BL, Fabramine Red 8BL, Fastolite Red 8BL, Fastusol Red 4BA-CF, Fenaluz Red 4B, Helion Red 8B, Hispaluz Red 8BL, Intralite Red 5B, Isma Fast Red 8B, Paranol Fast Red 8BL, Pergasol Red 2B, Pheno Fast Scarlet 9B, Pontamine Fast Red 8BLX, Pyrazol Fast Red 5BL, Pyrazol Fast Red 8BL, Pyrazoline Red 8BL, Saturn Red B, Sirius Red 4B, Sirius Red 4BA, Sirius Supra Red 4B, Solamine Red 4B, Solaminrot 4B, Solantine Red 8BL, Solar Red B, Solius Red 4B, Sumilight Red 4B, Suprazo Red 4B, Suprexcel Red 8BL, Tertrodirect Fast Red 5B, Tetramine Fast Red 8B, Triantine Fast Red 4BN, Triantine Light Red 4BN, disodium 4-hydroxy-7-[(phenylcarbonyl)amino]-3-[(E)-{4-[(E)-(4-sulfonatophenyl)diazenyl]phenyl}diazenyl]naphthalene-2-sulfonate
• CAS: 2610-11-9

Description

Direct Red 81 is a dye that is used in wastewater treatment. It is an adsorbent for the removal of reactive organic matter and other pollutants from water, which are then converted to harmless substances by microorganisms. Direct Red 81 has been shown to be effective in removing organic matter from wastewater in a kinetic study using samples containing hydroxyapatite. This dye also binds to bacterial cells, which may be due to its ability to react with sulfhydryl groups on proteins or DNA. The toxicity of Direct Red 81 has been studied using vitro methods and it has been shown that this dye does not have any effect on bacterial growth or viability.

• Brand: Biosynth

Chemical properties

• Molecular weight: 675.61 g/mol
• Formula: C₂₉H₁₉N₅Na₂O₈S₂
• Color/Form: Powder