... , almost insoluble in water, easy solulbe in sodium hydroxide solution or ammonia solution, soluble in dilute hydrochloride acid. Quality Standard BP2002ItemIndexAppearance white ... of Solution≤Y5BY5GY5Heavy Metals≤10PPMContent99.0~101.0%Loss on Drying ≤0.5%Ignition Residue≤0.1%Related Matters≤0.5% Sulfadiazine