1,zinc carbonate basic 56.5%,57%,57.5% 2,free sample available 3,SGS certificate zinc carbonate basic 56.5%,57%,57.5% 1. Product features This product is white slight ... the petroleum, the chemical fertilizer industries as well as the rubber product, the paint, the medicine and other chemical products. ... Sieve Residue (75microns mesh): ≥959493Cd ≤0.00040.0010.005 zinc carbonate basic 56.5%,57%,57.5%