English	FCC,1996	QB2554-2002
(Content).≤%	99.0	97.0
PH Value	Normal()	----
Arsenic,≤	0.0003	0.00005
Heavy metals(As pb)	0.0005	0.0001
Chlordes I or Br	Normal()	-
Loss on drying	1	1
Sodium experiment	negative()	-
Degree of whiteness	-	80
NaCI	-	1.45
Water insolubles	-	0.05
Foreign matter soluble in water		0.5
Ammonium(As NH4+)		0.01