... spray fertilizer and a constituent of compound fertilizer. In dyeing industry, it is used to produce vat dyestuff and discharge of ice dyeing. It ... 's degreasing. In addition, it is also used in manufacture of printing ink, photograph-drug, polyester, explosives, electroplating, tanning, ceramic, ... .0003Heavy Metal(as Pb) % ≤0.002standardGB/T 1587-2000HG2452-93 Technical Grade of Potassium Carbonate