3-HYDROXYNAPHTHALENE-2,7-DISULFONIC ACID DISODIUM SALT
3-hydroxy-2,7-naphthalenedisulfonic acid, disodium salt
CAS: 135-51-3
Molecular Formula: C10H9NaO7S2
3-HYDROXYNAPHTHALENE-2,7-DISULFONIC ACID DISODIUM SALT - Names and Identifiers
3-HYDROXYNAPHTHALENE-2,7-DISULFONIC ACID DISODIUM SALT - Physico-chemical Properties
| Molecular Formula | C10H9NaO7S2 |
| Molar Mass | 328.28 |
| Melting Point | 107℃ |
| Water Solubility | Soluble in water |
| Solubility | Solubility soluble in water, ethanol and ether. |
| Appearance | Ash-like solids |
| Color | White to Gray to Brown |
| BRN | 3643184 |
| Storage Condition | Inert atmosphere,Room Temperature |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| MDL | MFCD00065915 |
| Physical and Chemical Properties | Colorless and lustrous filamentary needle-like crystals, easily deliquescent. solubility soluble in water, ethanol and ether. |
| Use | For the preparation of food pigments, azo dyes, photosensitive copy paper |
3-HYDROXYNAPHTHALENE-2,7-DISULFONIC ACID DISODIUM SALT - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/38 - Irritating to eyes 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 | QJ6477000 |
3-HYDROXYNAPHTHALENE-2,7-DISULFONIC ACID DISODIUM SALT - Upstream Downstream Industry
| Raw Materials | 2-Naphthol Sulfuric acid |
| Downstream Products | sodium 6,7-dihydroxynaphthalene-2-sulphonate |
3-HYDROXYNAPHTHALENE-2,7-DISULFONIC ACID DISODIUM SALT - Introduction
Colorless and shiny filament needle-like crystals, easy to deliquesce
Last Update：2022-10-16 17:13:34
3-HYDROXYNAPHTHALENE-2,7-DISULFONIC ACID DISODIUM SALT - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| properties | colorless and shiny filament needle-like crystals, easy to deliquesce. Soluble in water, ethanol and ether. |
| use | for the production of food coloring, azo dyes, photosensitive copy paper, etc.; used as a fluorescent indicator, also used to synthesize azo dyes; used for the production of food coloring, azo dyes, photosensitive copy paper. used to make food coloring, azo dyes, photosensitive copy paper, etc. used as fluorescent indicator, also used to synthesize azo dyes used to produce food coloring, azo dyes, photosensitive copy paper. |
| Production method | 2-naphthol sulfonated with sulfuric acid in the presence of sodium sulfate to obtain 2-naphthol -6,8-disulfonic acid (G acid) and 2-naphthol -3,6-disulfonic acid (R acid). Dilute the sulfonate and salt out with potassium chloride, so that G acid is precipitated first in the form of double potassium salt (see 26250), and the remaining waste acid liquid is salted out with sodium chloride to precipitate R acid into double sodium salt to obtain R salt. Raw material consumption quota: 35000kg/t for waste acid of g salt (1.23g/cm3) and 14000kg/t for salt (above 90%). |
Last Update：2024-04-10 22:29:15
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View History
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Raw Materials for 3-HYDROXYNAPHTHALENE-2,7-DISULFONIC ACID DISODIUM SALT
Downstream Products for 3-HYDROXYNAPHTHALENE-2,7-DISULFONIC ACID DISODIUM SALT