Direct black 56 (C.I. 34170)
Direct Black 56
CAS: 8003-57-4
Molecular Formula: C36H22N7Na3O10S3
Direct black 56 (C.I. 34170) - Names and Identifiers
Direct black 56 (C.I. 34170) - Physico-chemical Properties
| Molecular Formula | C36H22N7Na3O10S3 |
| Molar Mass | 877.76509 |
| Physical and Chemical Properties | Chemical properties gray powder. The aqueous solution is dark purple and insoluble in ethanol. Its aqueous solution is added with concentrated hydrochloric acid to produce dark blue precipitate; adding concentrated alkali to produce dark purple precipitate. It is green and gray-blue in concentrated sulfuric acid, and purple after dilution. Slightly sensitive to hard water. |
| Use | Mainly used for cotton, hemp, viscose and other cellulose fiber fabric dyeing, can also be used for silk fabric dyeing, can also be used for leather, pulp dyeing. |
Direct black 56 (C.I. 34170) - Upstream Downstream Industry
Direct black 56 (C.I. 34170) - Production method
aniline, mixed Cliff acid, & gamma; Acid is used as raw material, aniline is diazotized and coupled with mixed Cliff acid, then the coupling product is diazotized, coupled with another mixed Cliff acid, and the second coupling product is diazotized again, and & gamma; Acid coupling product. The finished product is salted out, filtered, dried and crushed.
Last Update：2024-04-10 22:29:15
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Spot supply
Product Name: Direct fast grey LBN Visit Supplier Webpage Request for quotationCAS: 8003-57-4
Tel: +86 0571-86722205
Email: sales@chinaskyrun.com
Mobile: +8618958170122
QQ: 2531159185
Wechat: chinaskyrun
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Raw Materials for Direct black 56 (C.I. 34170)