21799-87-1
Hydroquinone sulfonic acid, potassium salt
CAS: 21799-87-1
Molecular Formula: C6H7KO5S
21799-87-1 - Names and Identifiers
21799-87-1 - Physico-chemical Properties
| Molecular Formula | C6H7KO5S |
| Molar Mass | 230.28 |
| Density | 1.74[at 20℃] |
| Melting Point | 251°C (dec.)(lit.) |
| Boling Point | 591.05℃[at 101 325 Pa] |
| Water Solubility | soluble |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | White solid |
| Color | White to Almost white |
| BRN | 5187027 |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Incompatible with bases, oxidizing agents. |
| MDL | MFCD00007475 |
21799-87-1 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 2 |
| TSCA | Yes |
| HS Code | 29082000 |
21799-87-1 - Reference Information
| LogP | -3.912 at 25℃ |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Introduction | Potassium 2, 5-dihydroxybenzenesulfonate is a derivative of 2, 5-dihydroxybenzenesulfonate, which can be used alone or in combination with other drugs for the treatment of male sexual dysfunction and other endothelial vascular diseases. Potassium 2, 5-dihydroxybenzene sulfonate can be prepared from hydroquinone as the starting material. |
| preparation method | hydroquinone (25g,0.2270 mol) and n-heptane (75 mL) are put into a round bottom flask, the flask is cooled to about 10-15°C, and sulfuric acid (36 N,22.2g) is added dropwise for about 10-15 minutes. Slowly raise the temperature to 50-55°C, then continue stirring for 3 hours. The reaction material was then cooled to 25-35°C and ethyl acetate (250mL) was added to dissolve the formed solid. A solution of potassium 2-ethylhexanoate (41.3g,0.2265mol) in ethyl acetate (250mL) was slowly added. Stir the reaction further for an hour. The precipitated crude solid was filtered and washed with ethyl acetate. |
Last Update：2024-04-09 21:00:56
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