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Specifications

Test items Food-grade
Sodium sulfite (Na2SO3)  % 97
Iron  Fe                % 0.001
Free Alkali  (Na2CO3)    % 0.4
Lead Pb                 % 0.0005
Arsenic As              % 0.0002
Definition   Clarification
Water insoluble matter  % --
Sulfate     (Na2SO4 )   % --
Chloride    (NaCl)     % --