Identification meet the criterion Loss on drying % ≤ 10.0 Granularity 100% passed the 20 mesh crbble <5% passed the 80 mesh crbble Percentage of monensin A Activity in the monensin ≥ 90% Percentage of monensin A Activity plus monensin B Activity in the monensin ≥ 95% Assay 400-440mg/g Heavy metals ≤ 20ppm Arsenic salt ≤ 2ppm