Trade name:VS Chemical name:Vinyl sulphonate, sodium salt Molecular formula:C2H3NaSO3 CAS.:3039-83-6 Assay:25-26% Appearance:Colorless to yellowish transparent liquid Solid content::35% chroma(APHA):200 PH value:8-12 NaCl content::3-4% Unfilterable substance:0.1%(max) inhibitor(p-hydroxy methylphenol):500PPM(max)