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Direct Red 31
Direct Red 31
/ CAS : 5001-72-9| Appearance | Reddish brown powder. The water solubility is good. The aqueous solution is blue red. Add concentrated hydrochloric acid to produce jujube red precipitation, and add concentrated alkali to turn orange brown. | Formula | C32H21N5Na2O8S2 | Molecular Mass | 713.64700 |
| HS | 0.0 | UN | 0.0 | DG Class | 0.0 |
| Synonyms | 7,7'-Iminobis[4-Hydroxy-3-(Phenylazo)-2-Naphthalenesulfonic Aci Disodium Sa; Benzo Rhoduline Red B; C.I. Direct Red 31; Chloramine Rose B,Pyrazol Pink 2B; Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate; Diphenyl Red Rw; Direct Pink; Nippon Fast Red 2B | ||||
Manufacturer List
1 manufacturers found for "Direct Red 31"
54 YRS
Shandong, China
Manufacturing
Main Products:
Direct Red 23 / Disodium 7,7'-(Carbonyldiimino)bis(4-Hydroxynaphthalene-2-Sulphonate) / Direct Yellow 96 / Direct Red 31 / Direct Blue 86 / J Acid / Rhoduline Acid / 2-Aminonaphthalene-1-Sulfonic Acid / 7-Anilino-4-Hydroxy-2-Naphthalenesulfonic Acid / P-Anisidine-3-Sulfonic Acid
Quality Certificates:
-
Loading Port:
Qingdao
![Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate###Direct Red 31](https://res.chemball.com/upload2/29b9402c-02a2-41ba-8149-8dcefad955d5.jpg?x-oss-process=image/resize,m_fill,w_320,h_320)
Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate###Direct Red 31
99.0%
Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate###Direct Red 31
- 99.0%
![Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate###Direct Red 31](https://res.chemball.com/upload2/c9013048-2ab0-4d6c-9e02-2e187596264e.jpg?x-oss-process=image/resize,m_fill,w_320,h_320)
Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate###Direct Red 31
99.0%
Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate###Direct Red 31
- 99.0%
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