Sodium benzoate is an important acid type food preservatives, it becomes effective form benzoic acid when using. The range of application and the usage amount refers to benzoic acid. In addition, it can also be used as preservative of fodder.
Packaging & Transportation
I. Basic Information
Chemical Name
Sodium Benzoate
CAS Number
532-32-1
Molecular Formula
C₇H₅NaO₂
Molecular Weight
144.11 g/mol
Appearance
White crystalline powder
Solubility
Highly soluble in water (~66 g/100 mL at 25°C); slightly soluble in ethanol.
pH Value
7.0-8.5 (1% aqueous solution, 25°C).
Melting Point
~300°C (decomposition).
Storage Conditions
Store in a cool, dry place (<25°C), protected from moisture and light.
II. Applications
1. Food Industry
Preservative: Inhibits mold, yeast, and bacteria growth to extend shelf life.
Applications: Carbonated drinks (e.g., cola), sauces (ketchup, mustard), jams, candies, pickles.
Synergy: Often combined with potassium sorbate for enhanced antimicrobial effects.
Acid Regulator: Adjusts pH to stabilize flavors.
2. Pharmaceutical Industry
Excipient: Used in tablets and capsules to prevent microbial contamination.
Injectable Stabilizer: Prevents microbial growth in injectable solutions.
3. Cosmetics Industry
Preservative: Used in lotions, shampoos, and conditioners to inhibit microbial growth.
pH Adjuster: Balances acidity in formulations (e.g., acidic cleansers).
4. Other Industries
Chemical Synthesis: Intermediate for producing benzoate esters (e.g., plasticizers).
Water Treatment: Inhibits microbial growth in cooling systems.
III. Technical Specifications
| Parameter | Standard | Reference |
|---|---|---|
| Purity (HPLC) | ≥99.5% | |
| Moisture Content | ≤0.5% | |
| Heavy Metals (Pb) | ≤10 ppm | |
| Arsenic (As) | ≤3 ppm |
IV. Safety & Regulations
GRAS Status: Generally Recognized as Safe (21 CFR 184.1733).
EU Approval: Authorized as food additive (E211) with usage limits (e.g., ≤0.2% in beverages).
China Standard: GB 2760-2014 specifies maximum usage levels (e.g., ≤0.5 g/kg in candies).
Toxicity: Low toxicity; LD₅₀ (rat oral) ~4070 mg/kg. Excessive intake may cause allergies or asthma.
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