p-Chloroaniline-o-sulfonic acid
2-Amino-5-chlorobenzenesulfonic acid
CAS: 133-74-4
Molecular Formula: C6H6ClNO3S
p-Chloroaniline-o-sulfonic acid - Names and Identifiers
| Name | 2-Amino-5-chlorobenzenesulfonic acid |
| Synonyms | Diazoxide Impurity 1 5-Chloroorthanilic Acid 4-Chloroaniline-2-sulfonic acid 4-CHLOROANILINE-2-SULFONIC ACID p-Chloroaniline-o-sulfonic acid P-chloroaniline-2-sulfonic acid 4-chloroaniline-2-sulphonic acid 2-AMINO-5-CHLOROBENZENESULFONIC ACID 2-Amino-5-chlorobenzenesulfonic acid 2-azanyl-5-chloro-benzenesulfonic acid |
| CAS | 133-74-4 |
| EINECS | 205-119-3 |
| InChI | InChI=1/C6H6ClNO3S/c7-4-1-2-5(8)6(3-4)12(9,10)11/h1-3H,8H2,(H,9,10,11) |
p-Chloroaniline-o-sulfonic acid - Physico-chemical Properties
| Molecular Formula | C6H6ClNO3S |
| Molar Mass | 207.63 |
| Density | 1.642±0.06 g/cm3(Predicted) |
| Melting Point | >300°C |
| Water Solubility | 3.13g/L(0 ºC) |
| Solubility | DMSO (Slightly), Water (Slightly) |
| Appearance | Solid |
| Color | White to Off-White |
| pKa | -1.76±0.42(Predicted) |
| Storage Condition | Refrigerator |
| Sensitive | Hygroscopic |
| Refractive Index | 1.639 |
| MDL | MFCD00035776 |
| Physical and Chemical Properties | Colorless needle-like crystals. Decomposition at 320-340 °c. Soluble in hot water. It turns red when heated. |
p-Chloroaniline-o-sulfonic acid - Reference Information
| use | for organic synthesis intermediates. |
| Production method | It is obtained by sulfonation of p-chloroaniline: 100% sulfuric acid is slowly dropped into p-chloroaniline and the solvent diphenyl sulfone, and the reaction is intense to produce 4-chloroaniline-2-sulfonic acid and water. When the water is steamed out, the reaction mixture becomes bright purple crystals. Continue heating for 7h under reduced pressure, cool the melt, dissolve in heated water, filter out the diphenyl sulfone in the solution, and cool to produce white needle crystals. Filtration, washing and drying to obtain the finished product. 94% yield. |
Last Update：2024-04-10 22:29:15
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