Product name:  monosodium salt monohydrate,H Acid

Chemical name:   8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate

Molecular formula: C₁₀H₈O₇NS₂Na

Molecular weight: 341.3

    OH   NH₂

 NaO₃S     SO₃H

Properties:  

    (1) solubility in water at 20℃ is 0.17%
    (2) solubility in water at 60C℃ is 2.40%
    (3) insoluble in alcohol and diethyl ether 
    (4) soluble in alkali, sodium carbonate and ammonia solution 
    (5) dilute solution of H acid has blue red fluorescent light 
Uses: important dye intermediate, it can be widely used in producing active, acid, direct, mordant and other dyes.