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Solvent Red 31

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Solvent Red 31 Basic information

Product Name:
Solvent Red 31
Synonyms:
  • 7-hydroxy-8-[[4-(phenylazo)phenyl]azo]naphthalene-1,3,6-trisulphonic acid, compound with bis(cyclohexyl)amine
  • C.I.27306
  • C.I.Solvent Red 31
  • Solvent Red 31
  • (8Z)-7-Oxo-8-({4-[(E)-phenyldiazenyl]phenyl}hydrazono)-7,8-dihydr o-1,3,6-naphthalenetrisulfonic acid - N-cyclohexylcyclohexanamine (1:1)
  • Solvent Red 31 ISO 9001:2015 REACH
  • C.I.Solvent Red 31:C.I.27306
CAS:
6226-90-0
MF:
C34H39N5O10S3
MW:
773.89596
EINECS:
228-322-9
Product Categories:
  • Solvent Dyestuff
Mol File:
6226-90-0.mol
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Solvent Red 31 Usage And Synthesis

Preparation

4-(Phenyldiazenyl)benzenamine diazotization and 7-Hydroxynaphthalene-1,3,6-trisulfonic acid coupling, and then translate into dicyclohexyl amine salt.

Properties and Applications

red. Dark red powder. Insoluble in water, slightly soluble in ethanol for magenta. In concentrated sulfuric acid to purple, dilution after pink. Dye aqueous solution to join concentrated hydrochloric acid to red; Add thick sodium hydroxide solution for brown. Used for plastic, grease, printing ink, paint color.

Standard Light Fastness Heat-resistant(℃) water Sodium Carbonate(5%) Hydrochloric acid(5%)
Melting point Stable
ISO Good 120(1hr) Well Poor Poor

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