Appearance 25deg C: White or yellowish-white powder/ K value: 27-32.4/ Aldehyde,ppm max: 500/ Peroxides (as H2O2) ppm max: 400/ Hydrazine,ppm max: 1/ Moisture % max: 5.0/ Sulphated ash % max: 0.1/ Heavy metal(as Pb) ppm max: 10/ Efficient content % min: 95/ pH(5% solution):3-7/ Assay,as Nitrogen content % max : 11.5-12.8