- DESCRIPTION
| CAS Registry No.: | 532-32-1 |
| Molecular Formula: | C7H5O2Na |
| Molecular Weight: | 144.105 g/mol |
| Structural Formula: |
|
| Synonyms: | Benzoic acid, sodium salt |
- SPECIFICATIONS
Physical Property
| Appearance | white or colorless crystalline powder |
| Odor | odorless |
| Density | 1.497 g/cm3 |
| Melting point | 410 °C (770 °F; 683 K) |
|
Solubility in water |
62.69 g/100 mL (0 °C) 62.78 g/100 mL (15 °C) 62.87 g/100 mL (30 °C) 71.11 g/100 mL (100 °C) |
| Solubility | soluble in liquidammonia, pyridine |
| Solubility inmethanol | 8.22 g/100 g (15 °C) 7.55 g/100 g (66.2 °C) |
| Solubility inethanol | 2.3 g/100 g (25 °C) 8.3 g/100 g (78 °C) |
| Solubility in1,4-Dioxane | 0.818 mg/kg (25 °C) |
Technical Data
| Item | Specification |
| Appearance | White, almost odorless crystalline powder |
| Identification | |
| Benzoates | Positive |
| Sodium | Positive |
| Appearance of solution | |
| Clarity | Clear |
| Color | Y6 |
| Assay ,% | 99.0-100.5 |
| Acidity or alkalinity (ml/g) | 0.2 Max |
| Halogated compounds | |
| Ionised chlorine, ppm | 200Max |
| Total chlorine, ppm | 300Max |
| Heavy metals ,Pb (ppm) | 10 Max |
| Readily oxidisable substance | Passed |
| Polycyclic acids | Positive |
| Loss on drying, % | 2.0 Max |
- PACKAGING
Standard packaging: 25kg/bag, inner is PE film bag, outer bag is PP film bag.
Available special request
- STORAGE
It shall be stored in a well-ventilated, cool and dry place which is out of direct sunlight. Keep containers tightly closed when not in use.
- PERIOD OF VALIDITY
24 months
- APPLICATIONS
Sodium benzoate is an acidic preservative and has no bactericidal and bacteriostatic action in alkaline media. The optimal pH for its preservation is 2.5-4.0. The bactericidal effect of a 5% solution at pH 5.0 is not very good. Sodium benzoate is more lipophilic and easily penetrates the cell membrane into the cell body, interfering with the permeability of the cell membrane, inhibiting the absorption of amino acids by the cell membrane, entering the alkaline reservoir of the ionized acidified cells within the cell body, and inhibiting the activity of the cell’s respiratory enzyme system, Blocks the acetyl-CoA condensation reaction and thus serves the purpose of food preservation.