The heavy metal content requirements of food-grade magnesium oxide generally refer to relevant regulations such as the National Food Safety Standard (GB), the US Food Chemical Codex (FCC), and the EU Standard (E 530). The specific requirements are as follows:
1. China National Standard (GB 1886.214-2016)
Lead (Pb) ≤ 2 mg/kg
Arsenic (As) ≤ 3 mg/kg
Cadmium (Cd) ≤ 1 mg/kg
Mercury (Hg) ≤ 0.1 mg/kg
Heavy metals (in terms of Pb) ≤ 10 mg/kg
2. Food Chemical Codex (FCC) of the United States
Lead (Pb) ≤ 2 mg/kg
Arsenic (As) ≤ 3 mg/kg
Cadmium (Cd) ≤ 1 mg/kg
Mercury (Hg) ≤ 0.1 mg/kg
Heavy metals (in terms of Pb) ≤ 10 mg/kg
3. EU Standard (E 530)
Lead (Pb) ≤ 2 mg/kg
Arsenic (As) ≤ 3 mg/kg
Cadmium (Cd) ≤ 1 mg/kg
Mercury (Hg) ≤ 0.1 mg/kg
Heavy metals (in terms of Pb) ≤ 10 mg/kg
In general, the heavy metal indicators of food-grade magnesium oxide are basically consistent with these international standards. In actual applications, there may be slight differences in different countries and regions, so it is recommended to test and confirm according to specific regulatory requirements.