Properties: White powder or fine crystalline, odorless, taste salty, easily soluble in water, slightly soluble in ethanol, aqueous solution was slightly alkaline. Thermal decomposition. Slow decomposition in moist air. 
 Molecular formula: NaHCO3 
 Specifications: Total alkali content (as NaHCO3 dollars) ≥ 99% 
 Arsenic (As) ≤ 0.0001% 
 Heavy metals (Pb) ≤ 0.0005% 
 Loss on drying ≤ 0.2% 
 PH value of 8.6 
 Uses: food industry, fermentation agents, detergent ingredients, carbon dioxide generating agent, pharmaceutical raw materials, detergent for wool, leather, ore smelting, fire extinguishing agent, heat treatment of metals, fiber and rubber industries. 
 Production methods: carbon method (Trona direct carbonization) 
 Trona by alkali (sodium carbonate solution) and clarification filtration, the clear liquid into carbonization tower; CO2 gas is compressed into the bottom of the tower from the carbonation, the reverse gas-liquid contact, carbonated crystal slurry from the bottom of the tower removed by centrifugation, drying, derived products. 
 Executive Standard: GB1887-90