Sodium metabisulfite

analytical standard

100

≥98.0% (iodometric, RT)

limited shelf life, expiry date on the label

>300 °C (lit.)

chloride (Cl^-): ≤50 mg/kg, thiosulfate (S₂O₃^2-): ≤500 mg/kg

As: ≤0.5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤200 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg

cleaning products
cosmetics
food and beverages
personal care

neat

[Na+].[Na+].[O-]S(=O)S([O-])(=O)=O

1S/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2

HRZFUMHJMZEROT-UHFFFAOYSA-L