orthanilic acid
Aniline-2-sulfonic acid
CAS: 88-21-1
Molecular Formula: C6H7NO3S
orthanilic acid - Names and Identifiers
| Name | Aniline-2-sulfonic acid |
| Synonyms | 2-SULFOANILINE Orthanilic acid ANILINE-2-SULFONIC ACID 2-aminobenzenesulfonate ANILINE-O-SULFONIC ACID Aniline-2-sulfonic acid 2-Aminobenzenesulfonic acid 2-AMINOBENZENESULFONIC ACID 2-aminobenzenesulphonic acid ORTHO AMINO PHENOL SULPHONIC 2-amino-1-benzenesulfonic acid ORTHANILIC ACID (2-AMINOBENZENESULFONIC ACID) |
| CAS | 88-21-1 |
| EINECS | 201-810-9 |
| InChI | InChI=1/C6H7NO3S/c7-5-3-1-2-4-6(5)11(8,9)10/h1-4H,7H2,(H,8,9,10)/p-1 |
| InChIKey | ZMCHBSMFKQYNKA-UHFFFAOYSA-N |
orthanilic acid - Physico-chemical Properties
| Molecular Formula | C6H7NO3S |
| Molar Mass | 173.19 |
| Density | 1.342 (estimate) |
| Melting Point | 300 °C |
| Boling Point | 363.26℃[at 101 325 Pa] |
| Water Solubility | sparingly soluble |
| Solubility | 3.565g/L in organic solvents at 20 ℃ |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Crystalline Powder |
| Color | White to beige |
| Merck | 14,6882 |
| BRN | 1309204 |
| pKa | 2.48(at 25℃) |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Refractive Index | 1.5500 (estimate) |
| MDL | MFCD00007705 |
| Physical and Chemical Properties | Gray-white needle-like crystals. Melting point> 300 °c. Soluble in concentrated hydrochloric acid, slightly soluble in water, insoluble in ethanol and ether. |
| Use | Reactive brilliant red K-4BC |
orthanilic acid - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 34 - Causes burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S28A - |
| UN IDs | UN 2585 8/PG 3 |
| WGK Germany | 3 |
| RTECS | DB4727700 |
| TSCA | Yes |
| HS Code | 29214200 |
| Hazard Class | 8 |
| Packing Group | III |
orthanilic acid - Introduction
Slightly soluble in hot water, soluble in concentrated hydrochloric acid, insoluble in ethanol and ether. It has the properties of aromatic sulfonic acid and aromatic amine, and is oxidized and turned red in air.
Last Update：2022-10-16 17:29:34
orthanilic acid - Reference Information
| LogP | 0 at 23℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| biological activity | 2-aminenzenesulfonic acid (O-Aminobenzenesulfonic acid) is a biological acid that plays a role in benzoic acid degradation and microbial metabolism. |
| Use | reactive dye intermediates. For Reactive Red K-2B, red K-2BP, red K-2G, red M-2B, red X-B, red X-10B, red K-3R, such as active purple. intermediate for reactive dyes reactive brilliant red K-4BC |
| production method | with O-nitrochlorobenzene as raw material, through the vulcanization reaction, oxidation reaction, hydrolysis reaction, the reaction step of reducing acid is prepared. The industrial product obtained was an off-white crystalline powder. |
Last Update：2024-04-09 02:00:12
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