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) % | ≤ | -- |