84-57-1
Dichlorosulfophenyl-3-methylpyrazolone
CAS: 84-57-1
Molecular Formula: C10H8Cl2N2O4S
84-57-1 - Names and Identifiers
| Name | Dichlorosulfophenyl-3-methylpyrazolone |
| Synonyms | 254CSMP 4-Acetylbutyric acid ethyl ester dichlorsulfofenyl-methylpyrazolon Dichlorosulfophenyl-3-methylpyrazolone 1-(2',5'-Dichloro-4'-Sulfo)phenyl-3-Methyl-5-Pyrazolone 1-(2',5'-Dichloro-4'-sulfophenyl)-3-methyl-5-pyrazolone 1-(2,5-Dichloro-4-sulfophenyl)-3-methyl-5(4H)-pyrazolone 1-(2,5-Dichloro-4-sulfophenyl)-3-methyl-2-pyrazolin-5-one 2,3-dichloro-6-(5-methyl-3-oxo-1H-pyrazol-2-yl)benzenesulfonic acid 2,5-dichloro-4-(3-methyl-5-oxo-2-pyrazolin-1-yl)-benzenesulfonicaci 2,5-Dichloro-4-(3-methyl-5-oxo-2-pyrazolin-1-yl)benzenesulphonic acid benzenesulfonicacid,2,5-dichloro-4-(4,5-dihydro-3-methyl-5-oxo-1h-pyrazol-1 benzenesulfonicacid,2,5-dichloro-4-(4,5-dihydro-3-methyl-5-oxo-1h-pyrazol-1-y 2,5-dichloro-4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-Benzenesulfonicacid |
| CAS | 84-57-1 |
| EINECS | 201-541-7 |
| InChI | InChI=1/C10H8Cl2N2O4S/c1-5-4-8(15)14(13-5)7-3-2-6(11)9(12)10(7)19(16,17)18/h2-4,13H,1H3,(H,16,17,18) |
84-57-1 - Physico-chemical Properties
| Molecular Formula | C10H8Cl2N2O4S |
| Molar Mass | 323.15 |
| Density | 1.5186 (rough estimate) |
| Melting Point | 346°C (dec.)(lit.) |
| Appearance | powder to crystal |
| Color | White to Orange to Green |
| pKa | -1.41±0.50(Predicted) |
| Storage Condition | Room Temprature |
| Refractive Index | 1.6000 (estimate) |
| MDL | MFCD00035706 |
| Physical and Chemical Properties | Character white or yellow crystalline powder. soluble in water and ethanol, soluble in alkali, slightly soluble in ether. |
| Use | For the synthesis of C.I. Acid yellow 17, C.I. Acid orange 40, C.I. Reactive yellow 1 and other reactive dyes |
84-57-1 - 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. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| RTECS | DB6040000 |
84-57-1 - Upstream Downstream Industry
84-57-1 - Nature
Open Data Verified Data
white or yellow crystalline powder, soluble in water and ethanol, soluble in alkali, slightly soluble in ether.
Last Update：2024-01-02 23:10:35
84-57-1 - Preparation Method
Open Data Verified Data
2, 5-chloroaniline was sulfonated and then diazotized with sodium nitrite. The diazonium salt is reduced by sodium sulfite and sodium bisulfite to give 2, 5-chloro-4-sulfonylphenylhydrazine sulfonate sodium salt, which is acidified by sulfuric acid to form sulfate, then condensed with ethyl acetoacetate, and then neutralized by soda ash to remove ethyl ester, re-acidification to obtain finished product.
Last Update：2022-01-01 10:54:05
84-57-1 - Use
Open Data Verified Data
dye intermediates, mainly used in the manufacture of acid yellow 2G and active yellow M-5G,K-6G,X-6G and so on.
Last Update：2022-01-01 10:54:04
84-57-1 - Safety
Open Data Verified Data
- low toxicity, its toxicity and protection method see 1-phenyl -3-methyl -5-pyrazolinone.
- It is packed in an iron drum lined with plastic bags. 30kg or 50kg per bucket. Store in a cool and ventilated place. Prevent heat and moisture. According to the general provisions of the storage and transportation of chemicals.
Last Update：2022-01-01 10:54:05
84-57-1 - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | for the synthesis of C.I. Acid yellow 17, C.I. Acid orange 40, C.I. Reactive yellow 1 and other reactive dyes |
| production method | 2, 5-dichloroaniline was sulfonated and then diazotized with sodium nitrite. The diazonium salt is reduced by sodium sulfite and sodium bisulfite to obtain sodium 2, 5-dichloro-4-sulfonylphenylhydrazine sulfonate, which is acidified by sulfuric acid to form sulfate, then condensed with ethyl acetoacetate, and then neutralized by soda ash to remove ethyl ester, re-acidification to obtain finished product. |
Last Update：2024-04-09 15:16:53
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Raw Materials for 84-57-1