SODIUM METABISULFITE 98%MIN POWDER, ( FOOD.GRADE )   

INSPECTION STANDARD  GB 1893—2008

TESTING ITEM                        INDEX   RESULT

Main Content(as NA2S2O5)        98% MIN 

SO2 Content                                   65% MIN      

Insoluble in water                          0.01% MAX  

Ferrous content:                            0.001% MAX  

Heavy metal(Pb) content                0.001%MAX      

Moisture                                           0.05% MAX   \