Sodium benzoate powder Raw Materials CAS 532-32-1

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Uses and synthesis of Sodium benzoate powder

Sodium benzoate powder (chemical formula: C6H5CO2Na), E number E211, is the sodium salt of benzoic acid.Sodium benzoate CAS 532-32-1 belongs to the acidic preservative in the acidic environment of the preservative effect is good, it is very commonly used in food preservatives.

Sodium benzoate Raw Materials has the effect of preventing deterioration and acidity, extending the shelf life, and is widely used in countries around the world.

Applications / Functions of Sodium benzoate powder

• 1.Sodium benzoate CAS 532-32-1 can be used as food additives (preservatives), bactericides in the pharmaceutical industry, mordant in the dye industry, plasticiser in the plastics industry, and also used as an intermediate in organic synthesis, such as spices.
• 2.Co-solvent for serum bilirubin test.
• 3.Sodium benzoate powder is used in pharmaceutical industry and plant genetic research, also used as dye intermediates, fungicides and preservatives.

Physicochemical Property of Sodium benzoate powder

Sodium benzoate Raw Materials Appearance is white crystals or particles, or colourless powder, with a sweet astringent taste. It is soluble in water and ethanol, glycerol, methanol.

Production methodprocess of Sodium benzoate powder

Neutralise benzoic acid with 32% soda ash solution in a neutralisation pot to a Ph value of 7.5, the neutralisation temperature is controlled at 70°C. The neutralisation solution is made with 0.3% soda ash solution. The neutralised solution is decolourised with 0.3% activated carbon and filtered by vacuum suction, the filtrate is concentrated and dried to form Sodium benzoate powder.

Sodium benzoate CAS 532-32-1 is obtained by neutralising benzoic acid with sodium bicarbonate. Add water and sodium bicarbonate into the neutralisation pot, heat to boiling and dissolve into sodium bicarbonate solution. Put benzoic acid under stirring, until the pH of reaction solution is 7-7.5, heat to make carbon dioxide escape, add activated carbon to decolourise for half an hour.
Filtering, the filtrate is concentrated and slowly put into the liquid disc of the flake machine, flake by roller drying, crushing, sodium benzoate. Consumption quota benzoic acid (99.5%) 1045kg/t, sodium bicarbonate (98%) 610kg/t.

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