High Quality Sodium Metabisulphite CAS 7681-57-4

High quality sodium metabisulphite cas 7681-57-4 application:mordant of printing and dyeing; dechlorinate of textile after bleaching; sulphonated agent and reducer of chemical industry and pharmacy; bleach of paper pulp, bamboo and timber bleach of stapk; treatment agent of waste water; rubber solidifying agent ;perfume industry is served as hydrocarbon perfume aldehyde  the hide profession employ to do to molt dose and pliable dose and wearproof dose , the sensitize industry is served as the developing agent reductant and the protection of fixing bath dose and so on; sewage treatment. Sodium metabisulfite 96%-98% h.s.code:28331900cas no.:7681-57-4   item chinese standardhg/t2826-2008 company standard top-grade first grade main content(na2s2o5) 96.5 min 95.0 97.0 fe %( fe) 0.005max 0.010 0.002 water-insoluble 0.05max 0.05 0.02 arsenic(as) content 0.0001max -- 0.0001