Name | Vat Red 1, Solubilized |
Synonyms | Solubilized Helasol Pink R Anthrasol Pink IR Solubilised Vat Red 1 Vat Red 1, Solubilized Arlindone Brilliant Pink IR Extra Vat red 1 solubilized (C.I. 73361) disodium 6,6'-dichloro-4,4'-dimethyl[2,2'-bibenzo[b]thiophene]-3,3'-diyl disulphate [2,2'-Bibenzo[b]thiophene]-3,3'-diol, 6,6'-dichloro-4,4'-dimethyl-, bis(hydrogen sulfate), disodium salt |
CAS | 3875-72-7 |
EINECS | 223-400-9 |
Molecular Formula | C18H13Cl2NaO8S4 |
Molar Mass | 579.42 |
Physical and Chemical Properties | Chemical properties soluble in water is blue and red, insoluble in ethanol and organic solvents. It is green and olive in concentrated sulfuric acid, and red and purple after dilution. |
Use | Uses reduced pink S-3B for cotton, silk, wool, viscose fiber, polyester, cotton, polyester cotton dyeing and cotton printing. |
EPA chemical information | [2,2'-Bibenzo[ B ]thiophene]-3,3'-diol, 6,6'-dichloro-4,4'-dimethyl-, bis(hydrogen sulfate), disodium salt (3875-72-7) |
using reduced pink r as raw material, it is reduced in pyridine with iron powder, chlorosulfonic acid esterification, and then poured into sodium carbonate solution to decompose, after recovering pyridine, filtering out insoluble matter, salting out and filtering to obtain the product.