PRODUCT Properties
| Boiling point: | 205.5°C (rough estimate) |
| Density | 1.3163 (rough estimate) |
| refractive index | 1.6390 (estimate) |
| pka | -0.61±0.50(Predicted) |
| form | powder to crystal |
| color | Red to Purple |
| CAS DataBase Reference | 1563-01-5 |
| EPA Substance Registry System | Benzenesulfonic acid, 3-[[4-(diethylamino)-2-hydroxyphenyl]azo]-4-hydroxy- (1563-01-5) |
Safety
| RTECS | DB6050000 |
| HS Code | 2930.90.2900 |





![m-[(p-Aminophenyl)azo]benzenesulphonic acid](https://img.chemicalbook.com/CAS/GIF/102-23-8.gif)