x0.25% max----Sodium nitrite?0.01% max0.02% max0.15% maxWater insolubles0.03% max0.05% max-----Sodium Carbonate0.05%0.1% max-----Iron (Fe)0.005%---------Application:It is the important chemical material and widely used in industries including glass, dye, metallurgy, machinery and vitreous enamel etc.Packing:Packed in 25kg plastic woven bag , 500kg/1000kg/1100kg? jumbo bag or as per the buyer's req