Sodium Metabisulphite

Item

Index

Technical Grade

Food Grade

Special

First

Na2S2O5 % ≥

96.5

95.0

96.5

1. (Fe) ≤

50ppm

100ppm

30ppm

Clear Degree

—

—

Through The Test

Water-fast Material % ≤

0.05

0.05

—

3269707. metal(Pb) % ≤

—

—

5ppm

19. Arsenic(As) ≤

1ppm

—

1ppm