| CAS Number | 88-21-1 |
| Catalog Description | Orthanilic acid, 97% |
| Synonym | Aniline-2-sulfonic acid |
| Synonym | 2-Aminobenzenesulfonic acid |
| Synonym | o-Sulfanilic acid |
| MDL Number | MFCD00007705 |
| Linear formula | C6H4(NH2)(SO3H) |
| Master Molecular formula | C6H7NO3S |
| Melting point in C | 300° |
| Merck Number | 14,6882 |
| EC Number | 201-810-9 |
| Shipping | Non-hazardous for shipping |
| CAS Number | 88-21-1 |
| Signal Word | Warning |
| Pictogram code 1 |
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| H Phrases | H315-H319-H335 |
| P Phrases | P261-P280-P305+P351+P338-P321-P405-P501A |
| TSCA | Yes |
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