Manganese Oxalate MnC2O4.2H2O A white crystalline compound, soluble in dilute acids, only slightly soluble in water, used as a paint and varnish drier. Manganese Oxalate 98%min Fe: 50ppm max Pb: 20ppm max Cu: 20ppm max Water-insoluble: 0.05% Optional Information -HS Code: 29171110 Molecular formula: MnC2O4.2H2O Molecular weight: 178.99 CAS Number: 6556-16-7 Packing: 25Kg/Bag Total output: 1000tons per year.