| Product | Benzidine 2,2 disulfonic Acid |
| Synonym | 4,4’Diamino Diphenyl 2,2’ Disulphonic acid |
| CAS # | 117-61-3 |
| Molecular Formula | C12H12N2O6S2 |
| Molecular Weight | 344 |
| Physical Appearance | Pale yellow to off white moist crystalline powder |
| Purity | 75% Min. by NV on MWT. 344 |
| Solubility | Soluble in soda ash and caustic solution |
| Metanillic Acid Content | 0.5% Maximum |
| Insoluble in Alkali | 0.3% Maximum |
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