1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY)
5-hydroxynaphthalene-1-sulphonic acid
CAS: 117-59-9
Molecular Formula: C10H8O4S
1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY) - Names and Identifiers
| Name | 5-hydroxynaphthalene-1-sulphonic acid |
| Synonyms | L-Acid L Acid 1,5-Oxy acid 1-Naphthol-5-sulfonic Acid 5-hydroxy-1-naphthalenesulfonicaci 5-Hydroxy-1-naphthalenesulfonic acid 5-hydroxynaphthalene-1-sulfonic acid 1-Naphthalenesulfonic acid,5-hydroxy- 1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY) 5-hydroxynaphthalene-1-sulphonic acid 5-Hydroxynaphthalene-1-sulphonic acid 1-NAPHTHOL-5-SULFONIC ACID SODIUM SALT TECH 5-HYDROXY-1-NAPHTHALENESULFONIC ACID SODIUM SALT TECH |
| CAS | 117-59-9 |
| EINECS | 204-199-7 |
| InChI | InChI=1/C10H8O4S/c11-9-5-1-4-8-7(9)3-2-6-10(8)15(12,13)14/h1-6,11H,(H,12,13,14) |
1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY) - Physico-chemical Properties
| Molecular Formula | C10H8O4S |
| Molar Mass | 224.23 |
| Density | 1.549±0.06 g/cm3(Predicted) |
| Melting Point | 110~112℃ |
| Appearance | White or nearly white crystalline powder |
| pKa | 0.26±0.40(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.703 |
| Physical and Chemical Properties | The appearance was a white solid, and the industrial product was an off-white or slightly red slurry. |
| Use | For the preparation of dyes and organic pigments, such as direct cyan L, pigment purple paste BLC, Lake purple CK, etc., photoresist sensitizers 215 are also used. |
1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY) - Upstream Downstream Industry
| Raw Materials | Naphthalene |
1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY) - Nature
Open Data Verified Data
gray-white to reddish paste. Melting point 110-112 °c. Soluble in water.
Last Update：2024-01-02 23:10:35
1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY) - Preparation Method
Open Data Verified Data
with the addition of sodium hydrogen sulfite and then hydrolyzed by sodium hydroxide and neutralized by sulfuric acid, the raw material of the acid (1-naphthylamine -5-sulfonic acid) was used.
Last Update：2022-01-01 10:56:17
1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY) - Application
Open Data Verified Data
dye intermediates.
Last Update：2025-08-19 16:24:40
1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY) - Safety
Open Data Verified Data
slightly toxic. Mice were given oral LD50 lOg/kg and intraperitoneal injection of LD50 2.5 g/kg. 50kg lined with plastic bag and packed with iron drum.
Last Update：2022-01-01 10:56:17
1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY) - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| uses | intermediates for preparing direct dyes and organic pigments used for preparing dyes and organic pigments, such as direct dark blue l, pigment purple sauce BLC, lake purple CK, etc., and also used for preparing photoresist sensitizer 215. In addition to synthetic dyes and pigments, it has been used to synthesize sensitizers for laser printing in recent years. This product is an intermediate of direct dyes and organic pigments. |
| Production method | It is obtained from 1-naphthylamine-5-sulfonic acid through salt formation, hydrolysis, and neutralization. |
Last Update：2024-04-09 20:52:54
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Raw Materials for 1-NAPHTHOL-5-SULFONICACID(L-ACID,DRY)