... ) Test ItemSpecificationCharacteristicClean odorless, fine white powder2.AIdentification(Carbonate, CO32-)Effervesce with acids, evolving a colorless gas that when ... .24.Loss on drying % ≤ 0.55.Barium saltNo green flame6.Magnesium and alkali metals % ≤ 1.07.Iron % ≤ 0.048.Heavy metals ... (Mr.)Henan Kingway Chemicals Co., Ltd. Food Grade Precipitated Calcium Carbonate (PCC)