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Sodium nitrate standard GB/T4553-2002

Item	Value
Item	Premium grade	First grade	Salable product
sodium nitrate (NaNO₃)( dry ) ≥	99.70	99.30	98.50
moisture ≤	1.00	1.50	2.00
Water insoluble matter ≤	0.03	0.06	-
Chloride (as NaCl ) ( dry ) ≤	0.25	0.30	-
sodium nitrate (NaNO₂)( dry ) ≤	0.01	0.02	0.15
Na₂CO₃ ( dry ) ≤	0.05	0.10	-
Fe ≤	0.005	-
Bulk degree ≥	90.00
Remark : 1. moisture is determined by the test date befor the products leave factory; 2.Bulk degree is for anti-block additive item

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