Direct black 80 (C.I. 31600)
Direct Black 80
CAS: 8003-69-8
Molecular Formula: C36H23N8O11S3.3Na
Direct black 80 (C.I. 31600) - Names and Identifiers
Direct black 80 (C.I. 31600) - Physico-chemical Properties
| Molecular Formula | C36H23N8O11S3.3Na |
| Molar Mass | 908.791 |
| Stability | Stable. Incompatible with oxidizing and reducing agents. |
| Physical and Chemical Properties | Blue-black uniform powder. Soluble in water, aqueous solution is blue-black, add 10% sodium hydroxide solution turn red blue. Insoluble in organic solvents. It is blue in concentrated sulfuric acid, and purple precipitate appears after dilution; Yellow-red solution in concentrated nitric acid; Partially dissolved in concentrated hydrochloric acid, purple. |
Direct black 80 (C.I. 31600) - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | direct black OB is soluble in water, solubility is 30g/L, insoluble in acetone. Precipitation; The addition of 10% sulfuric acid turned to light blue, and the addition of 10% sodium carbonate solution did not change. For the dyeing of cellulose fibers, the dye was very good at 80-100 °c. Maximum affinity, acid resistance is very good. It darkened in case of copper, and remained unchanged in case of iron. |
| Use | direct black OB is mainly used for dyeing cellulose fibers, and can also dye silk in acetic acid or formic acid bath. When used for cellulose fiber and other fibers with Bath dyeing, silk, wool dyed light, acetate fiber does not stain, nylon slightly stained. It can also be used for paper and leather coloring. dyeing for cotton and hemp |
| production method | with P-aminoacetanilide, Gamma acid, and [1-Naphthylamine -6-(or 7)]-Sulfonic acid] as a raw material, the first aminoacetanilide diazotization, and gamma acid coupling, and then the acetyl group hydrolysis, and then double nitriding, followed by coupling with the cliffic acid, the product is then coupled with another molecule of gamma acid. After salting out, filtration, drying, grinding to get the finished product.. |
Last Update：2024-04-10 22:29:15
