Specs: Sodium Carbonate(Na2CO3): 99.2% MIN Chlorides(NaCl): 0.70% max Iron(Fe): 0.0035max Insoluble esubstance: 0.03% max Loss on dry: 0.8% max Space density of pile g/ml: 0.9% max(only for dense soda ash) Particle size 180um meshive: 70% min(only for dense soda ash)