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intermediate

3-hydroxynaphthalene-2,7-disulphonic acid

c.a.s no.:148-75-4
chemical structural formula: c10h8o7s2
molecular mass:304.2963
chemical name:2-  hydroxy-naphthalene-3,6 --disulfonic acid disodium

appearance

gray-white powder

content

above 80%

schaeffer's salt

below 1.5%

free acid (h2so4)

below 2%

water insoluble

below 0.1%

packaging

25kgwoven bag



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