Introduction:

Baking soda, that is, sodium bicarbonate, commonly known as baking soda, baking soda powder and sodium bicarbonate, is white and fine crystals, and its solubility in water is less than that of sodium carbonate. It is an industrial chemical and may be toxic. Solids begin to decompose gradually to produce sodium carbonate, carbon dioxide and water above 50℃, and completely decompose at 440℃.

Chemical properties:

It decomposes easily when heated. Slowly decompose in humid air. The reaction starts at about 50℃ to produce CO? , in 100℃ all become sodium carbonate. It decomposes rapidly in weak acid, and its aqueous solution begins to decompose carbon dioxide and sodium carbonate at 20℃, and all of them are decomposed at boiling point. Soluble in 10 part of water at 25℃, soluble in 12 part of water at about 18℃ and insoluble in ethanol. The solution made of cold water without agitation only slightly reacts with phenolphthalein test paper, and its alkalinity increases when it is placed or raised in temperature. The pH value of 0. 1mol/L water solution freshly prepared at 25℃ is 8.3. Low toxicity, median lethal dose (rat, oral) 4420mg/kg.

Storage:

Dry, dark and sealed.