| Physical Apperance | Off White Powder |
| Chemical Name | Supho Tobias Acid (2-Napthylamine - 1:5 Disulphonic Acid) |
| M.W. | 303 |
| CAS. No. | 19532-03-7 |
| Empirical Formula | C10H8NNaO6S2 |
| Structural Formula | |
| Puirity by N.V. | 65.00% Minimum |
| Acidity | 15% Maximum |
| Solubility | Soluble in Dilute Alkline Solution |
| Insolubles | 0.10% Maximum |
| Moisture Content | 22% Maximum |
| Stability | Stable in Dilute Alkline Solution |
| Application | Intermediate for Reactive Dyestuff |
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