This standard applies to carbonyl iron powder, a food additive obtained by reacting with carbon monoxide to form iron pentacarbonyl by using sponge iron as raw material, and then thermally decomposing iron pentacarbonyl.
GB 29212-2012 history
2012GB 29212-2012 Food additive carbonyl iron powder
GB 29212-2012 Food additive carbonyl iron powder was changed to ABNT NBR 14521-2011 Acceptance of lots of electronic meters of power - Procedure.