Product Name: Direct Black 80
C.I. No.: 31600
CAS No.: 8003-57-4
Molecular Formula: C36H23N8Na3O11S3
Molecular Weight: 908.78
Shade: black. Blue-black uniform powder.
Relative name:Direct black OB; Black OB;Atul Developed Black NB-OB
Direct Black 80 Physical Properties and light fastness, solubility.
| Direct Black 80 | |
| Dyeing depth % | 2 |
| Insolubles % | 0.15 |
| Light Fastness | 2-3 |
| Washing Fatness | 3-4 |
| Rubbing fastness(dry) | 4 |
| Rubbing fastness(wet) | 3 |
black. Blue-black uniform powder. Soluble in water for a blue-black, insoluble in organic solvents. The strong sulfuric acid for blue, purple precipitation after diluted; In nitric acid solution for yellow light red; Partly dissolved in strong hydrochloric acid for purple. The dye solution to join 10% sodium hydroxide solution for red light blue.
Used for cellulose fiber dyeing, also can be used for paper and leather color.
Note: The data contained here are based on our current knowledge and experience. It is the responsibility of user to test our products before the final application.
