Sodium Citrate (CAS 68-04-2) Ultimate Guide 2025
Table of Contents
Technical Specifications & Grade Comparison
| Parameter | Anhydrous | Dihydrate | Food Grade |
|---|---|---|---|
| CAS Number | 68-04-2 | 6132-04-3 | 68-04-2 |
| Molecular Formula | C6H5Na3O7 | C6H5Na3O7·2H2O | C6H5Na3O7 |
| Molecular Weight | 258.07 | 294.10 | 258.07 |
| pH (1% solution) | 7.5-9.0 | 7.0-8.5 | 7.5-8.5 |
Industrial Applications
Food Industry
- Buffer agent in dairy products (pH 6.0-8.0 stabilization)
- Emulsifier in processed cheeses (0.2-0.8% w/w)
- Flavor enhancer in beverages (0.05-0.15% concentration)
Pharmaceutical Sector
- Anticoagulant in blood collection tubes (3.2-4% solution)
- Alkalizing agent in oral rehydration salts
- Chelating agent in topical formulations
Pharmaceutical Grade Specifications
| Test Parameter | USP Requirement | Typical Analysis |
|---|---|---|
| Assay (dry basis) | ≥99.0% | 99.2-100.3% |
| Chlorides | ≤0.01% | <0.005% |
| Sulfates | ≤0.05% | <0.02% |
Implementation Case Studies
Case 1: Beverage pH Stabilization
A European juice manufacturer achieved 18-month shelf life stability using 0.12% sodium citrate buffer system, maintaining pH 3.8-4.2 across fruit varieties.
Case 2: Construction Material Enhancement
Concrete additive formulation with 0.3-0.5% sodium citrate demonstrated 40% retardation of initial setting time in high-temperature environments.
Client Success Stories
Pharma Client: MedSolutions GmbH
- Application: Anticoagulant in blood collection systems
- Volume: 12MT/month
- Result: Achieved 99.8% clot prevention rate in vacutainer production
Food Manufacturer: NutriGlobal Inc.
- Application: Cheese emulsification
- Usage: 0.6% in processed cheese
- Benefit: 25% improvement in melt characteristics
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Last Updated: March 10, 2025
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