4-CHLOROBENZENESULFINIC ACID SODIUM SALT HYDRATE
4-ChloroBenzene sulfinic acid sodium
CAS: 14752-66-0
Molecular Formula: C6H4ClNaO2S
4-CHLOROBENZENESULFINIC ACID SODIUM SALT HYDRATE - Names and Identifiers
4-CHLOROBENZENESULFINIC ACID SODIUM SALT HYDRATE - Physico-chemical Properties
| Molecular Formula | C6H4ClNaO2S |
| Molar Mass | 198.6 |
| Melting Point | 300 °C |
| Boling Point | 363.9°C at 760 mmHg |
| Flash Point | 173.9°C |
| Water Solubility | almost transparency |
| Vapor Presure | 6.22E-06mmHg at 25°C |
| Appearance | White crystalline powder |
| Color | White to Light yellow |
| BRN | 3575604 |
| Storage Condition | Inert atmosphere,Room Temperature |
| MDL | MFCD00035602 |
4-CHLOROBENZENESULFINIC ACID SODIUM SALT HYDRATE - Risk and Safety
| Safety Description | S24/25 - Avoid contact with skin and eyes. S22 - Do not breathe dust. |
| HS Code | 29309090 |
| Packing Group | III |
4-CHLOROBENZENESULFINIC ACID SODIUM SALT HYDRATE - Reference Information
| overview | as an important reaction intermediate, aromatic sulfonic acid compounds such as sodium p-chlorobenzene sulfite are widely used in medicine, printing and dyeing, pesticides, organic synthesis and other fields. This type of compound can be prepared by reducing sulfonyl chloride by reducing agents such as zinc powder or sodium sulfite, sulfur dioxide and aromatic hydrocarbons undergo Friedel reaction, mercaptan oxidation, and sulfur dioxide and Grignard reagent or aromatic diazonium salt reaction. Aromatic sulfinic acid was first prepared by Friedel reaction. A method for the synthesis of aromatic sulfinic acid by gas-liquid two-phase method by introducing sulfur dioxide into a mixture of aromatic compounds, aluminum trichloride and hydrogen chloride is reported in the literature. However, the reaction requires the operation of two toxic gases, the reaction time is long, and the reaction temperature is low. There are few subsequent reports on the improvement of this method. Chloroaluminate ionic liquid is used as both a catalyst and a solvent to make aromatic compounds and sulfur dioxide undergo a Friedel-Crafts reaction to produce aromatic sulfinic acid. However, the preparation cost of chloroaluminate ionic liquid is expensive, and the amount is large, it needs to be strictly stored without water, the reaction post-treatment is difficult, and the product and ionic liquid cannot be separated well, which affects its practical application. At present, aromatic sulfonic acid compounds in industry are obtained by the two-step reaction of aromatic compounds through chlorosulfonation and reduction of reducing agent. However, excessive chlorosulfonic acid is required for the reaction, and a large amount of wastewater and waste residue containing sulfuric acid, hydrochloric acid, sodium sulfate, sodium chloride, etc. will be obtained after the reaction, which does not meet the requirements of economic and environmental protection. |
Last Update：2024-04-09 02:00:07
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