Food Grade Sodium Citrate

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Food Grade Sodium Citrate
Details
Food Grade Sodium Citrate is a trisodium salt of citric acid, commonly supplied as white crystalline powder or granules.
Category
Acidity Regulators
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Description

Food Grade Sodium Citrate is a trisodium salt of citric acid, commonly supplied as white crystalline powder or granules. It is used as an acidity regulator, buffering agent, emulsifying salt and sequestrant in beverages, dairy products, processed cheese, sauces and other food formulations. 

 

Product Specification

 

 

Item

Specification

Product Name

Food Grade Sodium Citrate

Chemical Name

Trisodium Citrate Dihydrate

Formula

C₆H₅Na₃O₇·2H₂O

Molecular Weight

294.10

CAS No.

6132-04-3 / 68-04-2

EINECS No.

200-675-3

Appearance

White or colorless crystalline granules or powder

Odor

Odorless

Taste

Salty, cooling taste

pH (5% aqueous solution)

7.5–9.0

Assay

99.0–100.5%

Light Transmittance

≥95.0%

Moisture

10.0–13.0%

Readily Carbonizable Substances

≤1.0%

Sulphate

≤0.01%

Chloride

≤0.005%

Oxalate

≤0.01%

Calcium Salt

≤0.02%

Iron Salt

≤5 mg/kg

Arsenic

≤1 mg/kg

Lead

≤2 mg/kg

 

Key Functional Properties

 

 

Acidity Regulation: Sodium citrate is used to adjust acidity in food and beverage formulations where controlled pH is required.

Buffering: It works with citric acid to form a citrate buffer system for maintaining a defined pH range during formulation and processing.

Emulsifying Salt: In processed cheese, sodium citrate helps manage the interaction between casein, calcium and the fat-water system during heating.

Sequestration: Citrate ions bind certain metal ions, making sodium citrate suitable for formulations where control of mineral ions is required.

Water Solubility: The product is soluble in water, supporting its use in liquid foods, beverages and aqueous processing systems.

 

Buffering & pH Control

 

 

Citrate Buffer System: Sodium citrate can be combined with citric acid to establish a citrate buffer system. The ratio of the two components can be adjusted according to the required formulation pH.
Slightly Alkaline Solution: A 5% aqueous solution has a pH of 7.5–9.0, providing a measurable basis for formulation and incoming-material checks.
PH Verification: For bulk purchasing, buyers can specify the required pH test concentration and test method to keep supplier and internal QC results comparable. 

 

Applications by Food Category

 

 

Cheese Processing: Operates as an emulsifying salt in processed cheese manufacturing, preventing fat separation and allowing uniform melting without greasiness.

Beverage Manufacturing: Serves as a flavor enhancer and stabilizer in soft drinks, juices, and liquid nutritional formulations.

Sauces & Dressings: Used in sauces, dressings and similar formulated foods where acidity needs to be controlled.

Industrial Fermentation: Utilized within bacterial growth media to support controlled microbial environments during fermentation processes.

 

Formulation Considerations

 

 

Hydrate Form: This product is trisodium citrate dihydrate. Its molecular weight is 294.10, so dosage calculations should use the correct hydrate form.

Moisture Content: The specified moisture is 10.0–13.0%. Buyers comparing products from different suppliers should confirm whether the quoted specification refers to dihydrate or anhydrous material.

Physical Form: The product is supplied as crystalline granules or powder. Particle-size requirements should be confirmed when the production process involves dry blending, automatic feeding or controlled dissolution.

Sodium Intake: Sodium citrate contributes sodium to the finished food, so its use level should be included when calculating total sodium content and nutrition information.

 

Food Safety & Compliance

 

 

Heavy Metal Limits: Conforms to strict purity thresholds, capping arsenic at 1 mg/kg, lead at 2 mg/kg, and iron salts at 5 mg/kg to satisfy food safety laws.

Statutory Export Inspection: Subject to official CIQ statutory inspection and testing prior to release, verifying compliance with national export standards.

Organic Purity Standards: Limits readily carbonisable substances to 1.0% maximum, ensuring the absence of unreacted residues for safe ingestion in commercial food applications.

 

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FAQ

 

 

Q: Can custom mesh sizes be supplied for dry-blending lines?

A: Standard production is provided as granules or powder. Specific particle-size requirements can be reviewed upon request.

Q: What is the shelf life under warehouse storage?

A: The product typically remains stable for 24 months when stored in unopened packaging in a cool, dry space.

Q: Are batch-specific Certificates of Analysis provided?

A: Yes, every batch undergoes mandatory CIQ testing, and a detailed COA is issued prior to dispatch.

Q: What is the minimum order quantity for sea freight?

A: Standard export orders typically start at a 20-foot full container load, with mixed loading available for related products.

Q: How is packaging protected against moisture during transit?

A: All 25 kg bags and jumbo bags feature a heat-sealed internal polyethylene liner to prevent humidity absorption and caking.

Q: Are laboratory samples available for testing?

A: Yes, sample quantities can be provided for preliminary formulation evaluation.

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