... FDN1.Property Appearance: light brown powder Compose: sodium naphthalene sulfonate Synonym: polymethylene sodium naphthalene sulphonate Ion type: Negative ion Solubility: ... ion,ppm ≤40003. Performance and useEasily soluble in water, acid, alkali and hard water, it mainly woks as dispersant ... in disperse dye, vat dye, reactive dye, acid dye and leather used dyestuff. It has good dispersing ...