Product Name | Sodium Citrate (Trisodium Citrate) |
CAS No. | 68-04-2 (Anhydrous) / 6132-04-3 (Dihydrate) |
Molecular Formula | C₆H₅Na₃O₇ (Anhydrous) / C₆H₅Na₃O₇·2H₂O (Dihydrate) |
Molecular Weight | 258.07 (Anhydrous) / 294.10 (Dihydrate) |
Appearance | White crystalline granules or crystalline powder |
Main Types | Anhydrous: White crystalline powder, stable in air, no crystal water; suitable for moisture-sensitive applications and chemical synthesis. Dihydrate: Colorless or white crystalline granules, slightly deliquescent in moist air, efflorescent in hot air, loses crystal water when heated to 150°C; most common grade for food and pharmaceutical industries. |
Physical Properties | Anhydrous: White crystalline powder, cool and salty taste, relative density 1.857 (23.5℃), melting point 300℃, soluble in water (pH 7.0-8.5), slightly alkaline, insoluble in ethanol, odorless, decomposes above 240℃, stable in air. Dihydrate: Colorless or white crystalline solid, odorless, cool salty taste; soluble in water, insoluble in ethanol. |
Key Parameters | Assay: ≥99.0% (as anhydrous basis) Loss on Drying: Anhydrous ≤1.0%, Dihydrate 11.0%-13.0% pH (1% solution): 7.0-9.0 Heavy Metals (as Pb): ≤10 mg/kg Arsenic (As): ≤3 mg/kg Sulfates: ≤0.02% Chlorides: ≤0.02% Oxalates: ≤0.01% Calcium Salts: ≤0.02% |
Features | Non-toxic, high safety; excellent pH regulation and stability; strong chelating ability with metal ions (Ca²⁺, Mg²⁺, Cu²⁺, Fe²⁺, etc.); good buffering capacity; easy soluble in water; low toxicity; compliant with food/pharmaceutical grades. |
Main Applications | Food Industry: pH regulator, flavoring agent, buffering agent, emulsifier, stabilizer, preservative, raising agent-; used with citric acid for jams, jellies, juices, beverages, dairy products, pastries as gelling agent and nutrient supplement-. Pharmaceuticals: Anticoagulant (in vitro) via calcium chelation-, expectorant, diuretic, biological buffer, pharmaceuticals, injections. Water Treatment: Water softening agent (chelating Ca²⁺/Mg²⁺), metal ion chelating agent, pH stabilizer-; scale inhibition and corrosion inhibition in cooling systems-; flue gas desulfurization with citric acid-. Industrial Applications: Electroplating (complexing agent and buffer for nickel/copper/gold plating)-; detergent additive (replacing sodium tripolyphosphate)-; concrete retarder (improving tensile, compressive, and freeze-thaw resistance of cement products)-; ceramic grinding aid and whitening agent-; photography chemicals, brewing, organic synthesis, textile leveling buffer, cosmetics. |
Packaging | 25kg woven bags (PE liner); jumbo bags (1000kg) and small packages (1kg, 5kg, 10kg) available upon request. Food-grade packaging complies with food safety hygiene standards. |
Storage Conditions | Store in cool, dry, well-ventilated area; keep sealed to prevent moisture absorption; protect from high temperatures to prevent efflorescence (dihydrate). |
Shipping Requirements | Non-hazardous cargo; shipped as general cargo; protect from moisture, sunlight, and rain during transport; handle with care. No special restrictions for either anhydrous or dihydrate form. |
Quality Standards | Food Grade: GB 1886.25-2016 "National Food Safety Standard – Food Additive – Sodium Citrate"-; ISO 9001, Kosher, Halal certifications available; meets FCC, USP, BP, EP standards. |
Minimum Order Quantity | Standard: 20-25 tons (1×20'FCL); trial order: 5-10 tons negotiable. |
Delivery Time | Standard products: 7-15 working days; custom specifications: 15-25 working days. |
Payment Terms | T/T (30% deposit, 70% against B/L copy), L/C at sight; FOB/CFR/CIF supported. |
HS Code | 29181500 (Citric acid, its salts and esters, including Sodium Citrate) |
