20680-48-2
2-diazo-1-naphthol-4-sulfonic acid hydrate
CAS: 20680-48-2
Molecular Formula: C10H8N2O4S
20680-48-2 - Names and Identifiers
| Name | 2-diazo-1-naphthol-4-sulfonic acid hydrate |
| Synonyms | 1,2-Naphthoxydiazole-4-Sulfonic Acid 2-diazonio-4-sulfonaphthalen-1-olate 2-diazo-1-naphthol-4-sulfonic acid hydrate 3-diazo-4-oxo-3,4-dihydronaphthalene-1-sulfonic acid 3-diazo-4-hydroxy-3,4-dihydronaphthalene-1-sulfonic acid |
| CAS | 20680-48-2 |
| EINECS | 243-965-5 |
| InChI | InChI=1/C10H8N2O4S/c11-12-8-5-9(17(14,15)16)6-3-1-2-4-7(6)10(8)13/h1-5,10,13H,(H,14,15,16) |
20680-48-2 - Physico-chemical Properties
| Molecular Formula | C10H8N2O4S |
| Molar Mass | 252.247 |
| Physical and Chemical Properties | Chemical properties yellow needle-like crystals. Its sodium salt has a melting point of 168 ℃. |
| Use | Uses dye intermediates. For the synthesis of acid medium dyes, azo dyes, Nitro 1,2,4-acid diazo oxides. |
20680-48-2 - Risk and Safety
| Hazard Symbols | F - Flammable Xi - Irritant  |
| Risk Codes | R11 - Highly Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37 - Wear suitable protective clothing and gloves. |
| UN IDs | UN 3226 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 4.10 |
20680-48-2 - Production method
It is obtained by diazotization of 1-amino -2-naphthol -4-sulfonic acid (1,2,4-acid). Raw material consumption quota: 1,2,4-acid (40%)1052 kg/t, sodium nitrite (98%)320 kg/t, copper sulfate (96%)11 kg/t, sulfuric acid (98%)1018 kg/t, caustic soda (40%)31 kg/t.
Last Update：2024-04-10 22:29:15
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