Product category: Industrial sodium carbonate can be divided into: I category heavy sodium carbonate for use in industry and II category sodium carbonate for use in industry, according to uses. 
Appearance: light sodium carbonate is white crystalline powder, heavy sodium carbonate is white fine particle. 
Standard: GB－210.1－2004

Item		I category	II category
		Superior	Superior	First-class	Qualified
Total alkali (As mass fraction of dry basis NaCO3)/%          ≥ Total alkali (As mass fraction of wet basis NaCO3)a/%　   ≥		99.4 98.1	99.2 97.9	98.8 97.5	98.0 96.7
Sodium chloride (As mass fraction of dry basis NaCl)/%　　　 ≤		0.30	0.70	0.90	1.20
Mass fraction of iron (as dry basis) /%　　　　　　 ≤		0.003	0.0035	0.006	0.010
Sulfate (as mass fraction of dry basis SO4)/%　　　 ≤		0.03	0.03b
Mass fraction of water insoluble matter /%                   ≤		0.02	0.03	0.10	0.15
Bulk density C/ (g/mL)                                                ≥		0.85	0.90	0.90	0.90
Particle size C, residue on sieve /%	180um                                 ≥	75.0	70.0	65.0	60.0
	1.18mm                              ≤	2.0

Packing: Packed by coated PP woven bag, low salt soda ash dense 1000kg, 40kg, 25kg, soda ash dense 1000kg, 50kg, light soda ash 40kg, 25kg, dietary alkali 40kg, 500kg, 750kg, sodium bicarbonate 50kg, 25kg
Applications: Mainly used in glass-manufacturing, chemical industry, metallurgy, paper, dye, synthetic washes and petrochemistry.