Solvent Red 31
Name:C.I.Solvent Red 31,C.I.27306
Molecular Structure: Double azo class
C.I.Solvent Red 31,C.I.27306,CAS 6226-90-0,592.58,C22H16N4O10S3,Azosol Fast Scarlet CRA
Molecular Formula:C22H16N4O10S3
Molecular Weight: 592.58
CAS Registry Number:6226-90-0
Manufacturing Methods : 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 | |
List of Suppliers:
Azosol Fast Scarlet CRA(GAF Corporation)