Sodium Citrate Dihydrate

Chemical Name: Sodium Citrate Dihydrate (Trisodium Citrate Dihydrate)
Chemical Formula: Na₃C₆H₅O₇·2H₂O
Molecular Weight: 294.1 g/mol
CAS: 6132-04-3
Appearance: Colorless crystals or white crystalline powder, odorless
Taste: Salty and cool flavor
Density: Relative density (d₄²⁵) 1.857
Properties & Applications & PackagesInquiry
Technical Datas:

Items

Standards

Assay

99.0~ 100.5%

Water

11.0~ 13.0%

PH (5%w/v)

7.5~9.0

Sulfate

≤150mg/kg

Oxalate

≤100mg/kg

Chloride

≤50mg/kg

Lead

≤1mg/kg

Arsenic

≤1mg/kg

Mercury

≤1mg/kg

Heavy Metals(as Pb)

≤10mg/kg


Uses and Applications
1. Food Industry (E331)
-Sodium citrate dihydrate is one of the most important citrates used as a food additive:
-Buffering Agent: Maintains stable pH in food systems when combined with citric acid, forming a strong pH buffer
-Acidity Regulator: Adjusts and controls pH in various food products
-Preservative: Inhibits microbial growth, extending shelf life
-Emulsifier & Stabilizer: Prevents separation and improves texture in processed cheese, ice cream, and dairy products
-Flavoring Agent: Enhances flavor in jams, jellies, juices, beverages, cold drinks, dairy products, and pastries
-Gelling Agent: Used with citric acid as a gelling agent in jams, jellies, and desserts
-Antioxidant: Delays fat oxidation, preventing food spoilage
-Chelating Agent: Binds metal ions (Ca²⁺, Mg²⁺, Fe²⁺), reducing their interference in food processing
2. Specific Food Applications:
-Beverages, carbonated drinks, and fruit juices
-Jams, jellies, and marmalades
-Dairy products (ice cream, yogurt, cheese)
-Baked goods and pastries
-Processed meat products
-Sauces and condiments
3. Other Industrial Applications
-Electroplating: Used as a complexing agent and buffer in cyanide-free electroplating
-Detergent Industry: Replaces sodium tripolyphosphate in phosphate-free laundry detergents and liquid cleaners; enhances cleaning ability and prevents redeposition of dirt
-Photography: Used as a developer in photographic processing
-Chemical Synthesis: Acts as a buffer and reagent in various chemical processes
-Environmental Protection: Used for SOtail gas absorption in metallurgical and chemical industries (absorption rate up to 99%), with regeneration of liquid SO
-Cosmetics: Used as a buffering agent in cosmetic formulations 


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