Sodium Citrate CAS#68-04-2

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)