... peculiar smell Physiochemical requirements ItemGrade IGrade II Moisture,%(m/m)≤14.0 Fineness,%(m/m)≥99.5≥99.0 Spot, spots /cm2≤ ... % (m/m)≤0.15≤0.20 Protein (dry basis) %(m/m)≤0.50≤0.80 Fattiness (dry basis) % (m/m)≤0.15≤0.25 Sulfur dioxide,% (m/m)-------- Ferric ... salt (Fe) ,%(m/m ...