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Sodium Bicarbonate

Sodium bicarbonate, white crystal, or opaque monoclinic crystal system fine crystal, odorless, salty, soluble in water, insoluble in ethanol. It is weakly basic. It is stable in normal temperature and easy to decompose when heated. It decomposes rapidly at 50℃ and completely loses carbon dioxide at 270℃. It has no change in dry air and slowly decomposes in humid air.

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CHEMICAL PROPERTIES

Decompose easily in heat and decompose slowly in humid air. The reaction begins at about 50℃ to form CO? , at 100℃ all into sodium carbonate. It decomposes rapidly in weak acid, and its aqueous solution begins to decompose carbon dioxide and sodium carbonate at 20℃, and decomposes completely at the boiling point. The solution made of cold water without agitation was only slightly alkaline to phenolphthalein test paper, and its alkalinity increased when placed or raised the temperature. The pH value of 0.1mol/L aqueous solution prepared fresh at 25℃ was 8.3. Low toxicity, half lethal dose (rat, oral)4420mg/kg.

USE

Can be used for rubber, sponge production; It can be used as flux for casting steel ingot in metallurgical industry. Mechanical industry can be used as cast steel (foundry) sand molding auxiliars; Printing and dyeing industry can be used as dye printing fixing agent, acid and alkali buffer, fabric dyeing and finishing of the rear treatment agent; Baking soda is added to the dyeing process to prevent the yarns from producing color patterns. Pharmaceutical industry used as raw materials for acid preparation; It can also be used as a detergent for wool and for soaking seeds in agriculture.

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