Sodium metabisulfite Specification:
. non food grade,
Parameter Unit specification
Na2S2O5 g/100g Min.97.2
SO2 g/100g Min.65.5
PH Value(5% solution) 4.0-4.8
Nacl mg/kg 50 max
Heavy metals as Pb
mg/kg 10 max
Fe mg/kg 10 Max
Na2SO3+Na2SO4 remainder