1-Naphthalenesulfonic acid, dihydrate
1-Naphthalenesulfonic acid
CAS: 85-47-2
Molecular Formula: C10H8O3S
1-Naphthalenesulfonic acid, dihydrate - Names and Identifiers
| Name | 1-Naphthalenesulfonic acid |
| Synonyms | SULFONATED NAPHTHALENE naphthalene-1-sulfonate 1-Naphthyl sulfonic acid 1-Naphthalenesulfonic acid 1-NAPHTHALENESULFONIC ACID ALPHA NAPTHALENE SULPHONATE NAPHTHALENE-1-SULFONIC ACID naphthalene-1-sulphonic acid ALPHA-NAPHTHALENESULFONIC ACID 1-Naphthalenesulfonic acid, dihydrate Naphthalene-1-Sulfonic Acid Dihydrate NAPHTHALENE-1-SULFONIC ACID (TECHNICAL GRADE) 1-{2-[(3-{2-cyano-4-[2-(cyclopropylmethoxy)ethoxy]phenoxy}-2-hydroxypropyl)amino]ethyl}-3-(4-hydroxyphenyl)urea 1-[2-[[3-[2-cyano-4-[2-(cyclopropylmethoxy)ethoxy]phenoxy]-2-hydroxypropyl]amino]ethyl]-3-(4-hydroxyphenyl)urea |
| CAS | 85-47-2 |
| EINECS | 201-610-1 |
| InChI | InChI=1/C25H32N4O6/c26-14-19-13-23(34-12-11-33-16-18-1-2-18)7-8-24(19)35-17-22(31)15-27-9-10-28-25(32)29-20-3-5-21(30)6-4-20/h3-8,13,18,22,27,30-31H,1-2,9-12,15-17H2,(H2,28,29,32) |
1-Naphthalenesulfonic acid, dihydrate - Physico-chemical Properties
| Molecular Formula | C10H8O3S |
| Molar Mass | 208.23 |
| Density | 1.3797 (rough estimate) |
| Melting Point | 77-79 °C (lit.) |
| Boling Point | 317.43°C (rough estimate) |
| Flash Point | 380.2°C |
| Water Solubility | freely soluble |
| Solubility | alcohol: freely soluble |
| Vapor Presure | 7.23E-21mmHg at 25°C |
| Merck | 14,6376 |
| pKa | 0.17±0.10(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.4998 (estimate) |
| Physical and Chemical Properties | Prismatic white crystals, recrystallized from dilute hydrochloric acid containing 2 molecules of crystal water. Melting point 90 °c (hydrate),139-140 °c (anhydrous). Soluble in water and ethanol, slightly soluble in ether. |
| Use | For the preparation of 1-naphthol, 1,5-naphthalene two sulfonic acid and other intermediates |
1-Naphthalenesulfonic acid, dihydrate - Risk and Safety
| Risk Codes | R34 - Causes burns R11 - Highly Flammable R35 - Causes severe burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S28A - S16 - Keep away from sources of ignition. |
| UN IDs | UN 2583 8/PG 2 |
| WGK Germany | 1 |
| HS Code | 29041000 |
| Hazard Class | 8 |
| Packing Group | III |
1-Naphthalenesulfonic acid, dihydrate - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | is used in the manufacture of intermediates such as 1-naphthol, 1-naphthol sulfonic acid, and 1-naphthylamine sulfonic acid. used in the preparation of 1-naphthol, 1, 5-naphthalene disulfonic acid and other intermediates |
| production method | is obtained by sulfonation of naphthalene with chlorosulfonic acid. Sulfonation reaction with O-nitroethylbenzene as solvent, naphthalene, chlorosulfonic acid and O-nitroethylbenzene by molar ratio of 1:1.1:3, sulfonation reaction was carried out at 0-5 deg C, 1-Naphthalene sulfonic acid purity of 97%. If 98% sulfuric acid is used as the sulfonating agent, the reaction temperature is 0-40 ° C., The sulfonated compound contains 1-Naphthalene sulfonic acid 83-85%,2-Naphthalene sulfonic acid 15-17%, and the magnesium salt or sodium salt is added, the precipitated magnesium or sodium salt of 2-naphthalenesulfonic acid can be filtered off. The filtrate containing free 1-naphthalenesulfonic acid was concentrated, cooled, crystallized, filtered, washed with water, and dried to obtain a finished product. |
Last Update：2024-04-10 22:29:15
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