Anhydrous trisodium citrate (Sodium Citrate, CAS 68-04-2) is the sodium salt of citric acid, appearing as white crystalline powder or granular crystal. It possesses excellent chelating, buffering and pH adjusting properties, with stable chemical characteristics and good water solubility. Widely applied in pharmaceutical USP/BP, food FCCV/E331, beverage, detergent and cosmetic industries. TNJ Chemical is the leading manufacturer and exporter since from 2001. We guarantee high quality, competitive price, stable supply, fast delivery and tech support etc. To find more, please contact sales@tnjchem.com
Product Information
Common Name: Anhydrous Trisodium Citrate
CAS No.: 68-04-2
Molecular Formula: C₆H₅Na₃O₇Molecular Weight: 258.07
Synonyms: Trisodium citrate anhydrous, Sodium citrate anhydrous, 2-hydroxypropane-1,2,3-tricarboxylic acid trisodium salt
Chemphysical Properties
Appearance White crystalline powder or granular crystalMelting Point >300 ℃
pH (1% aqueous solution) 8.0 ~ 9.0
Solubility Soluble in water; insoluble in ethanol
Bulk Density 0.70 ~ 0.95 g/ml
Hygroscopicity Slightly hygroscopic under high humidity
Quality Specification
| Item | USP/EP Grade | Food E331 Grade | Industrial Grade |
|---|---|---|---|
| Assay (anhydrous basis), % | 99.0 ~ 101.0 | 99.0 ~ 101.0 | ≥98.5 |
| Loss on drying, % | ≤1.0 | ≤1.0 | ≤1.5 |
| Residue on ignition, % | 40.0 ~ 41.0 | 40.0 ~ 41.0 | 39.5 ~ 41.5 |
| Heavy Metal (Pb), ppm | ≤10 | ≤10 | ≤20 |
| Arsenic, ppm | ≤2 | ≤2 | ≤3 |
| Oxalate, % | ≤0.01 | ≤0.01 | - |
| Chloride, % | ≤0.005 | ≤0.005 | ≤0.01 |
| Sulfate, % | ≤0.015 | ≤0.015 | ≤0.03 |
Use & Application
USP/EP grade anhydrous trisodium citrate is widely used in pharmaceutical formulations as buffering agent, chelator and anticoagulant for blood collection. It can adjust pH for oral liquids, syrups and topical preparations, stabilize active ingredients and improve formulation compatibility.
Food grade anhydrous trisodium citrate acts as food additive E331, serving as acidity regulator, buffer, emulsifier and sequestrant. It is used in beverages, dairy products, processed cheese, jams and canned food to stabilize texture, control acidity and enhance flavor stability.
Industrial grade anhydrous trisodium citrate works as chelating agent and builder in phosphate-free detergents, water treatment, electroplating and textile printing & dyeing. It binds metal ions to prevent scale formation, improve cleaning performance and assist metal surface treatment.
Packing
25kg kraft paper bag with PE inner liner. Customized packing available upon request.
Delivery & Storage
Store in cool, dry and well-ventilated warehouse. Keep container tightly sealed to avoid moisture absorption. Keep away from strong oxidants. Shelf life is 24 months under proper storage. Transport as ordinary non-hazardous goods.
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