Products
| Direct Black 38 | |
| Product name | Direct Black 38 |
| Chinese name | 直接黑BN；直接黑EX；直接青光元；直接元；直接元青；氯唑黑；卡拉唑黑E；酸性绿光直接黑；偶氮黑；直接黑 38；偶氮黑E；氯唑黑E |
| English name | Direct Black 38 |
| Molecular formula | C34H25N9Na2O7S2 |
| Molecular weight | 781.73 |
| CAS No. | 1937-37-7 |
| Product photo |  |
| Structure |  |
| chemical properties | Soluble in water is black in green, slightly soluble in ethanol, a green blue black, soluble fiber, insoluble in other organic solvents. In concentrated sulfuric acid was diluted with deep red blue, reddish brown to red black precipitate; yellow brown solution was yellow brown in concentrated nitric acid; dark red black solution in con... The water solution with concentrated hydrochloric acid was reddish brown precipitate. The gray precipitate was generated by adding sodium hydroxide solution... |
| Appearance | Brown black powder |
| Melting point | 109-110°C |
| Content | |
| Moisture | |
| Packing | 500kg |
The other explanation |
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