Description

Sodium Citrate CAS NO 68-04-2 is the trisodium salt of citric acid, a versatile and essential chemical compound widely used as a buffering, sequestering, and emulsifying agent. Its primary value lies in its ability to control acidity, chelate metal ions, and stabilize formulations, making it indispensable for ensuring product quality and process efficiency. This product is a critical raw material for manufacturers in the food and beverage, pharmaceutical, personal care, and industrial cleaning sectors.

Application

• Food & Beverage Industry: Functions as a flavor enhancer, preservative, and emulsifier in processed cheeses, soft drinks, and jams. It also acts as an acidity regulator and antioxidant synergist.
• Pharmaceuticals: Serves as an anticoagulant in blood collection tubes (as trisodium citrate dihydrate), a buffering agent in effervescent formulations, and an alkalizing agent in various medicinal products.
• Personal Care & Cosmetics: Used as a pH adjuster and chelating agent in creams, lotions, and shampoos to improve stability and shelf life by binding metal impurities.
• Industrial Cleaning: An effective builder in phosphate-free detergents and cleaning agents, where it sequesters hard water ions to enhance surfactant performance.
• Water Treatment: Acts as a biodegradable chelating agent to control scale formation and inhibit corrosion in boiler and cooling water systems.
• Biotechnology & Molecular Biology: A key component in buffer solutions like SSC (saline-sodium citrate) for nucleic acid hybridization and other laboratory procedures.

Basic Information

Product Name	Sodium Citrate
CAS No.	68-04-2
Molecular Formula	C6H5Na3O7
Molecular Weight	258.07 g/mol (anhydrous basis)
Synonyms	Trisodium Citrate; Citric Acid Trisodium Salt; 2-Hydroxy-1,2,3-propanetricarboxylic Acid Trisodium Salt; Natriumcitrat; E331; Trisodium 2-hydroxypropane-1,2,3-tricarboxylate
EINECS	200-675-3

Quality Control

We supply Sodium Citrate in various grades, including Food Grade (FCC), Pharmaceutical Grade (USP/EP), and Technical Grade, to meet diverse industrial requirements. Our products undergo rigorous quality testing to ensure compliance with the relevant specifications for identity, purity, and safety. A Certificate of Analysis (COA) is provided with each shipment, detailing key parameters such as assay, heavy metal content, and clarity of solution.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); therefore, the original container must be kept tightly sealed after use to prevent caking and degradation due to moisture absorption.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (on dried basis)	99.0% - 100.5%
pH (5% solution)	7.5 - 9.0
Loss on Drying	≤ 11.0% (for dihydrate)
Heavy Metals (as Pb)	≤ 10 ppm
Chloride (Cl)	≤ 50 ppm
Sulfate (SO4)	≤ 150 ppm
Oxalate	Passes test
Readily Carbonizable Substances	Passes test

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.