Product Overview
Sodium Benzoate is the sodium salt of benzoic acid, widely employed as a preservative to inhibit the growth of yeast, bacteria, and fungi in acidic food and beverage products. It appears as a white, crystalline powder and is valued for its effectiveness, safety, and ease of use. Sodium Benzoate helps extend shelf life and maintain product quality without altering flavor.
Chemical and Physical Properties
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Chemical Formula: C7H5NaO2
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Molecular Weight: 144.11 g/mol
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Appearance: White crystalline powder
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Solubility: Highly soluble in water
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Effective pH Range: 2.5 – 4.0 (optimal)
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Odor: Odorless
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Taste: Slightly salty, but generally tasteless at usage levels
Applications and Functional Benefits
Sodium Benzoate is widely used in:
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Carbonated and non-carbonated beverages
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Fruit juices and nectars
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Pickles, sauces, and dressings
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Jams, jellies, and preserves
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Pharmaceuticals and cosmetics
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Personal care products
It controls microbial growth, preventing spoilage and ensuring safety, particularly in acidic environments.
Quality Specifications
| Parameter | Specification | Typical Result |
|---|---|---|
| Appearance | White crystalline powder | Complies |
| Purity (Assay) | ≥ 99.0% | 99.2% |
| Moisture Content | ≤ 1.0% | 0.7% |
| Heavy Metals (Lead) | ≤ 5 ppm | < 2 ppm |
| pH (1% Solution) | 8.0 – 9.0 | 8.5 |
| Solubility | Soluble in water | Complies |
| Microbial Count | Total aerobic bacteria < 1000 cfu/g | 350 cfu/g |
Sensory Profile
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Appearance: White, fine crystalline powder
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Odor: Odorless
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Taste: Neutral to slightly salty (not perceptible in typical use)
Packaging and Storage
Sodium Benzoate is typically packed in moisture-resistant 25 kg bags or drums. It should be stored in a cool, dry place, away from moisture and strong odors, to maintain quality and extend shelf life, usually up to 2 years.
Regulatory Approval
Sodium Benzoate is approved by FDA, EFSA, JECFA, and other international regulatory bodies. It is generally recognized as safe (GRAS) for use as a preservative in food, beverage, pharmaceutical, and cosmetic products.
Conclusion
Sodium Benzoate is an effective, safe, and widely accepted preservative essential for extending the shelf life of acidic foods and beverages. Its excellent solubility, broad antimicrobial activity, and neutral sensory impact make it a staple in many product formulations.
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