| Description | C.I. 20195 is a brown dye. |
| Synonyms | NSC-75909, NSC 75909, NSC75909 |
| molecular weight | 624.55 |
| Molecular formula | C26H16N4Na2O8S2 |
| CAS | 5850-16-8 |
| Storage | keep away from direct sunlight | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice. |
| Solubility | DMSO: Soluble |