Food grade: 1.Appearance; white crystalline powder 2.Assay(C2H5NO2)%(ON DRY MATTER) 98.5-101.5min 3.PH value:(5% in water) 5.6-6.4 4.Heavy metals(as Pb)% 0.002max 5.Lead (as Pb)% : 0.0005max' 6.Arsenic(as As)% : 0.0002max 7.Loss on drying % : 0.2max 8.Residre on ignition,% : 0.1max 9.Chloride(as Cl)% : 0.007max 10.Sulphate(as SO4)%: 0.006max 11.Iron(as Fe)%: 0.001max Technical grade: 1.Appearance; white crystalline powder 2.Assay(C2H5NO2)%(ON DRY MATTER) 97.5min 3.PH value:(5% in water) 5.6-6.4 4.Loss on drying % : 1.0max 5.Residre on ignition,% : 0.5max 6.Chloride(as Cl)% : 0.7max 7.Iron(as Fe)%: 0.003max Feed grade: 1.Appearance; white crystalline powder 2.Assay(C2H5NO2)%(ON DRY MATTER) 98.5-101.5min 3.PH value:(5% in water) 5.6-6.4 4.Heavy metals(as Pb)% 0.002max 5.Lead (as Pb)% : 0.0005max' 6.Arsenic(as As)% : 0.0003max 7.Loss on drying % : 0.2max 8.Residre on ignition,% : 0.5max 9.Chloride(as Cl)% : 0.007max 10.Sulphate(as SO4)%: 0.006max 11.Iron(as Fe)%: 0.002max medicine grade: 1.Appearance; white crystalline powder 2.Assay(C2H5NO2)%(ON DRY MATTER) 99-101.5min 3.PH value:(5% in water) 5.6-6.4 4.Heavy metals(as Pb)% 0.0001max 5.Arsenic(as As)% : 0.0002max 7.Loss on drying % : 0.2max 8.Residre on ignition,% : 0.1max 9.Chloride(as Cl)% : 0.007max 10.Sulphate(as SO4)%: 0.006max 11.Iron(as Fe)%: 0.001max Packing:in 25kg 4-layer kraft paper bag or paperboard barrel(or the package you are requirement)