Purity % ≥99%
Fe % ≤0.003
Water insoluble material % ≤0.02
Free alkali(Na2SO3) % ≤0.1
Na2SO4 % ≤2.5
NaCl % ≤0.1
Used as pharm intermediate and organic synthesis.
(1) Stored in a cool and dry well-closed container and in ventilated area.
(2) kept away from moisture and strong light or high temperature.
(3) Two years under well storage situation and stored away from direct sun light.