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Molecular formula : C10H8O7S2 MW : 304.30 CAS No. :118-32-1
nature : the white sheet or prism-shaped crystal or gray ashes. Vulnerable to dissolve in water, soluble in water, soluble in dilute. Yi deliquescence. The goods sodium or potassium salt said G (C10H6K2O7S2), the white needle crystal, and water-soluble. In the short-alkali solution was purple.
Preparation Methods : 2-naphthol by sulfonation, Salt arrived at the same time, Vice-R acid. Raw material consumption scale : 2-naphthoate 760kg / t, sulfuric acid (98%) 500 kg / t, KCl (93%) 940kg / t, fuming sulfuric acid (including SO320%) 1250kg / t.
purposes : as dye intermediates, the coupling is an important component, coupled with diazo component production 3R acidic red, purple acid complex 56KB, G weak acid such as red dyes, dye intermediates may prepare γ acid.
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