Molecular Formula | C10H7NaO5S |
Molar Mass | 262.21 |
Water Solubility | almost transparency |
Appearance | White crystal |
Color | White to Light yellow to Light orange |
Storage Condition | Inert atmosphere,Room Temperature |
MDL | MFCD00004074 |
Physical and Chemical Properties | Character: white crystal. solubility slightly soluble in water and acid, soluble in sodium hydroxide. |
Use | Used as a dye intermediate and a coupling agent for diazo-sensitive paper |
Hazard Symbols | Xi - Irritant |
Risk Codes | 36/37/38 - Irritating to eyes, respiratory system 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. |
Raw Materials | 3-hydroxy-2,7-naphthalenedisulfonic acid, disodium salt Sodium hydroxide Hydrochloric acid |
White Crystal, slightly soluble in water and acid, soluble in sodium hydroxide.
with 2-naphthol -3,6-sulfonic acid double sodium salt (R salt) as raw material, by alkali fusion to generate R sodium salt, further with alkali reaction into dihydroxy R salt disodium, then acidified with sulfuric acid to obtain 2, 3-hydroxynaphthalene-6-sulfonic acid. After decolorization, salting out, filtering, dissolving and filtering with salt
Hair concentration, filtration, acid washing, filter dry, 2,3-hydroxynaphthalene-6-sulfonic acid sodium salt, and finally filtered to get the finished product.
It is mainly used for the manufacture of printed papers, and is used as a coupling agent for the diazo sensitive paper. It is also used as a dye intermediate.
non-toxic. The iron drum is packed with plastic bags. 50kg per barrel. Store in a cool, dry, ventilated place. Protection against heat, moisture, fire and sun. According to the general provisions of the storage and transportation of chemicals.
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
Use | Used as a dye intermediate and a coupling agent for diazo photosensitive paper This product is a dye intermediate and is also used as a coupling agent for diazo photosensitive paper. |
Production method | It is obtained by alkali melting and acidification of 2-naphthol -3, 6-disulfonate sodium salt (R salt). |