l,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-
4-amino-5-hydroxynaphthalene-1,7-disulfonic acid
CAS: 130-23-4
Molecular Formula: C10H9NO7S2
l,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy- - Names and Identifiers
| Name | 4-amino-5-hydroxynaphthalene-1,7-disulfonic acid |
| Synonyms | K ACID AI3-50014 EUROPEAN K-ACID 1-amino-8-naphtho-4,6-Disulfonic acid 1-Amino-8-Naphthol-4,6-Disulfonic Acid 1-AMINO-8-NAPHTHOL-4,6-DISULFONIC ACID 4-amino-5-hydroxynaphthalene-1,7-disulfonic acid 4-Amino-5-hydroxynaphthalene-1,7-disulphonic acid 4-amino-5-hydroxynaphthalene-1,7-disulphonic acid l,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy- |
| CAS | 130-23-4 |
| EINECS | 204-982-3 |
| InChI | InChI=1/C10H9NO7S2/c11-7-1-2-9(20(16,17)18)6-3-5(19(13,14)15)4-8(12)10(6)7/h1-4,12H,11H2,(H,13,14,15)(H,16,17,18) |
l,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy- - Physico-chemical Properties
| Molecular Formula | C10H9NO7S2 |
| Molar Mass | 319.31 |
| Density | 1.880±0.06 g/cm3(Predicted) |
| Water Solubility | 20g/L at 26.4℃ |
| pKa | -0.83±0.40(Predicted) |
| Refractive Index | 1.764 |
| Physical and Chemical Properties | Light brown powder. Slightly soluble in cold water, soluble in hot water, soluble in soda ash or caustic soda solution, and ferric chloride yellow green role. |
l,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy- - Reference Information
| LogP | -2.33 |
| Application | used as an intermediate of azo dyes, reactive dyes and organic pigments, mainly used in the production of cationic dyes, reactive brilliant red K-2G, etc. |
| production method | is derived from 1-Naphthylamine -4,6, 8-trisulfonic acid by neutralization, alkali fusion and acidification. The 1-Naphthylamine -4,6, 8-trisulfonic acid is neutralized with soda ash solution to obtain the sodium naphthylamine trisulfonate, and then alkali-fused with sodium hydroxide solution at 178-184 ℃; it was then acidified with sulfuric acid for 4H at 0.7-0.78MPa. The resulting product was a rice-brown powder with a K-acid content of 80%. |
Last Update：2024-04-09 21:01:54
