Solubilised Vat Black 6
Name:C.I.Solubilised Vat Black 6,C.I.73661
Molecular Structure: Thioindigo class
C.I.Solubilised Vat Black 6,C.I.73661,CAS 10169-52-5,569.93,C20H10ClNNa2O8S3
Molecular Formula:C20H10ClNNa2O8S3
Molecular Weight: 569.93
CAS Registry Number:10169-52-5
Manufacturing Methods : (a) in the presence of Pyridine , with Chlorosulfonic acid treatment C.I. Vat Black 35 leuco; (b) in the Pyridine with metal (such as copper, iron, zinc, etc) and Sulfur trioxide source (such as Sulfur trioxide, Chlorosulfonic acid or Methyl chlorosulfonate, etc.) processing C.I. Vat Black 35. The above two kinds of situation after alkaline, filter out insolubles, remove Pyridine and salting out.
Properties and Applications: dark blue to blue black, soluble in water is blue-black.
| Standard | Ironing Fastness | Chlorine bleach | Light Fastness | Mercerized | Oxygen bleach | Soaping | |
| Fading | Stain | ||||||
| ISO | 4-5 | 7 | 4-5 | ||||
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