Sodium Citrate BP
Product Information
CAS Number
3/04/6132
Safety Data Sheets Download
Other Names
Citric acid, trisodium salt, dihydrate
1,2,3-Propanetricarboxylic acid, 2-hydroxy-, trisodium salt, dihydrate
Trisodium citrate, dihydrate
Sodium citrate, aqueous solution
Sodium Citrate BP
About Sodium Citrate BP
Sodium Citrate BP, also known as trisodium citrate, is the sodium salt of citric acid with the chemical formula Na₃C₆H₅O₇. It appears as a white, crystalline powder that is readily soluble in water, producing a slightly alkaline solution. Sodium citrate is produced by neutralizing citric acid with sodium hydroxide or sodium carbonate. The BP designation indicates it meets British Pharmacopoeia standards for pharmaceutical use.
Sodium Citrate BP Uses
Food and Beverage
Sodium citrate is widely used as an acidity regulator, emulsifier, and preservative in food products. It controls pH in beverages, jams, jellies, and dairy products, preventing separation and maintaining stability. In cheese making, sodium citrate acts as an emulsifying salt in processed cheese, improving texture and meltability. It enhances flavor in soft drinks and energy drinks, and prevents coagulation in evaporated milk and cream products.
Pharmaceuticals and Medical
Sodium citrate serves as an anticoagulant in blood collection tubes, preventing clotting by chelating calcium ions. It is used as a buffer and pH adjuster in pharmaceutical formulations including syrups, injections, and effervescent tablets. The compound functions as a urinary alkalinizer in medications treating kidney stones and metabolic acidosis. Sodium citrate also appears in oral rehydration solutions and as a flavoring agent in liquid medications.
Personal Care and Industrial
In cosmetics and personal care products, sodium citrate acts as a pH adjuster, chelating agent, and buffer in shampoos, bath products, and skin care formulations. It sequesters metal ions that can cause product degradation or discoloration. Industrial applications include use in electroplating as a complexing agent, in photography for buffering developer solutions, and in cleaning products as a water softener and detergent builder.
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