7-hydroxynaphthalene-1,3-disulphonic acid

C.A.S No.：118-32-1
chemical structural formula：C₁₀H₈O₇S₂
molecular mass：380.48
chemical name:2-hydroxy-naphthalene-6,8-dipotassium disulfonate

appearance	gray-white powder
content	above 90%(elaboration product above 95%)
the content of R salt	below 1.0%
free acid(H2SO4)	below 1.5%
water insoluble	below 0.1%
packaging	25kg woven bag