... prevention agent of fabric, timber and paper, also as fertilizer.SpecificationsSpecificationsIndustrial. gradeFood gradeAppearanceWhite crystalsMain content, % min99.099. ... 0Phosphorus pent-oxide, % min60.560.5Nitrogen as N, % min11.811.8Water insoluble, % max0.10.1Moisture, ... % max0.20.2Heavy metals,as Pb. % max------0.001Arsenic,as As. % max------0.0003Fluorde,as F. % max------0.005PH4 ...