Use:Can directly used to chemical fertilizer, can also used for manufacturing compound fatty, sulfuric acid potassium, chlorinat  

ITEM	High qulity	First glass	Qulified
(NITROGEN),≥	21.0	21.0	20.5
(FREE ACID),≤	0.2	0.3	1.0
(H2SO4),≤	0.03	0.05	0.20
(Fe),≤	0.007 0.007
(As),≤	0.00005
(pb),≤	0.005
,≤	0.01

ammonia sulphate