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See Chinese contents: GB 1886.307-2020 GB 1886.307-2020: National food safety standard - Food additive - Potassium copper chlorophyllin
This Standard is applicable to the food additive potassium copper chlorophyllin that uses silkworm excrement or grass, alfalfa, nettle, spinach and other plants as raw materials to extract chlorophyll or that is processed by saponification, copper substitution and other steps by directly using chlorophyll as raw material. The solvent used is acetone, dichloromethane, methanol, ethanol, isopropanol, n-hexane and (or) petroleum ether (boiling range is 90??C ~120??C).
