Solubilised Vat Black 25
Name:C.I.Solubilised Vat Black 25,C.I.69526
Molecular Structure: anthraquinones
C.I.Solubilised Vat Black 25,C.I.69526,CAS 23594-58-3,874.76,C45H20N2Na2O11S2
Molecular Formula:C45H20N2Na2O11S2
Molecular Weight: 874.76
CAS Registry Number:23594-58-3
Manufacturing Methods : (a) in the presence of Pyridine , with Chlorosulfonic acid treatment C.I. Vat Black 25 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 25. The above two kinds of situation after alkaline, filter out insolubles, remove Pyridine and salting out.
Properties and Applications: brown light grey. Black powder. Soluble in water. Used for cotton fabric dyeing, generally used for direct dyeing and reserving dyeing, is not used for printing. In the acidic conditions to wool and silk dyed.
| Standard | Ironing Fastness | Chlorine bleach | Light Fastness | Mercerized | Oxygen bleach | Soaping | |
| Fading | Stain | ||||||
| ISO | 4 | 4 | 8 | 5 | 4 | 4-5 | 5 |
| AATCC | 5 | 4 | 7-8 | 5 | 4-5 | ||
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