Sodium carbonate, molecular weight 105.99. The purity of chemicals is more than 99.5% (mass fraction), which is also called soda ash, but it belongs to salt, not alkali. Also known as soda or soda ash in international trade. It is an important organic chemical raw material, which is mainly used to produce flat glass, glass products and ceramic glaze. It is also widely used in household washing, acid neutralization and food processing.

Sodium carbonate is easily soluble in water and glycerol. 20g of sodium carbonate can be dissolved in100g of water at 20℃, with the highest solubility at 35.4℃. 49.7g sodium carbonate is soluble in 100g water, slightly soluble in anhydrous ethanol, and hardly soluble in propanol. The solution is alkaline and can turn phenolphthalein red.

Extended data:

Sodium carbonate aqueous solution is strongly alkaline (pH= 1 1.6) and corrosive. It can react with acids and some calcium and barium salts.

Sodium carbonate is widely used in daily chemical industry, building materials, chemical industry, food industry, metallurgy, textile, petroleum, national defense, medicine and other fields, as raw materials, cleaning agents and detergents for manufacturing other chemicals, as well as photography and analysis fields.

Followed by metallurgy, textile, petroleum, national defense, medicine and other industries. The glass industry is the biggest consumer of soda ash, consuming 0.2 tons of soda ash per ton of glass. In industrial soda ash, light industry, building materials and chemical industry account for about 2/3, followed by metallurgy, textile, petroleum, national defense, medicine and other industries.

Sodium carbonate is weakly irritating and corrosive. Direct contact can cause skin and eye burns. Inhaling its dust and smoke in production can cause respiratory irritation and conjunctivitis, as well as nasal mucosa ulcer, atrophy and nasal septum perforation. Eczema, dermatitis, cornlike ulcer and skin relaxation may occur after long-term contact with this product solution. The incidence of respiratory diseases among workers exposed to this product has increased. Incorrect intake can lead to digestive tract burns, mucosal erosion, bleeding and shock.

References:

Baidu encyclopedia-sodium carbonate