Sodium benzoate CAS#532-32-1
Safe & Approved Preservative – Non-toxic within recommended dosage, easily metabolized and eliminated, with ADI < 5 mg/kg body weight.
Strong Antimicrobial Activity in Acidic Media – Effectively inhibits yeast and microorganisms at low pH, ideal for acidic foods and beverages.
Wide Food Industry Application – Suitable for soft drinks, juices, jams, soy sauce, margarine, chewing gum, and confectionery products.
Efficient Preservation Performance – High lipophilicity enables rapid cell penetration to inhibit microbial enzymes and prevent spoilage.
Sodium Benzoate CAS#532-32-1
Sodium benzoate is a widely used food preservative with a mild odor and slightly sweet, astringent taste. It is stable in air, hygroscopic, and naturally present in fruits and spices. Its preservative activity is most effective in acidic conditions, strongly inhibiting yeast and microorganisms at low pH, while showing limited activity in neutral or alkaline environments.
In the body, sodium benzoate is safely metabolized and excreted in urine without accumulation when used within recommended limits (ADI < 5 mg/kg body weight). It is commonly applied in carbonated drinks, juices, jams, soy sauce, margarine, and confectionery products, providing reliable antimicrobial protection through inhibition of microbial enzymes and cell metabolism.
Sodium benzoate Chemical Properties
| Melting point | >300 °C (lit.) |
| density | 1,44 g/cm3 |
| vapor pressure | 0Pa at 20℃ |
| FEMA | 3025 | SODIUM BENZOATE |
| Fp | >100°C |
| storage temp. | room temp |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | Crystals, Granules, Flakes or Crystalline Powder |
| pka | 4.03[at 20 ℃] |
| color | White |
| Odor | odorless |
| PH | 7.0-8.5 (25℃, 1M in H2O) |
| biological source | synthetic |
| Water Solubility | soluble |
| Merck | 148,582 |
| BRN | 3572467 |
| Stability: | Stable, but may be moisture senstive. Incompatible with strong oxidizing agents, alkalis, mineral acids. |
| Cosmetics Ingredients Functions | FRAGRANCE |
| ANTICORROSIVE | |
| PRESERVATIVE | |
| InChIKey | WXMKPNITSTVMEF-UHFFFAOYSA-M |
| LogP | 1.88 |
| CAS DataBase Reference | 532-32-1(CAS DataBase Reference) |
| NIST Chemistry Reference | Sodium benzoate(532-32-1) |
| EPA Substance Registry System | Sodium benzoate (532-32-1) |
Safety Information
| Hazard Codes | Xi |
| Risk Statements | 36/37/38-62-63-68-36 |
| Safety Statements | 24/25-36-26 |
| WGK Germany | 1 |
| RTECS | DH6650000 |
| Autoignition Temperature | >500°C |
| TSCA | Yes |
| HS Code | 29163100 |
| Hazardous Substances Data | 532-32-1(Hazardous Substances Data) |
| Toxicity | LD50 orally in rats: 4.07 g/kg (Smyth, Carpenter) |
Product Application of Sodium Benzoate CAS#532-32-1
Sodium benzoate is widely used as a preservative with strong antibacterial and antifungal effects in acidic environments. It is commonly applied in acidic foods such as carbonated beverages, fruit juices, jams, pickles, salad dressings, and condiments, and is also used in pharmaceuticals and cosmetics (food additive E211). In addition, sodium benzoate serves as a fuel component in fireworks and rocket propellants, providing rapid combustion, thrust, and smoke, though it must be handled carefully due to its sensitivity to impact.
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