Sodium benzoate is a substance which has the chemical formula NaC7H5O2. It is a widely used food preservative, with an E number of E211. It is the sodium salt of benzoic acid and exists in this form when dissolved in water. It can be produced by reacting sodium hydroxide with benzoic acid.
- Cas No:
- 532-32-1
- Formula:
- NaC7H5O2
- Molecular Weight:
- 144.1
- Character:
- White crystalline & granular powder or flakes, odorless or with a faint odor. Hygroscopic, freely soluble in water, sparingly soluble in ethanol (95%)
- Packaging:
- 25/50 Kg. HDPE bags with polyliner inside
- Storage:
- In air tight container protected from light.
Available Grade & Specification
| Item | BP | USP |
|---|---|---|
| Assay | 99.0% - 100.5%(dried substance) | 99.0 to 101.5% as NaI on anhydrous basis |
| Identification | Positive | Positive |
| Alkalinity | Pass the test | Pass the test |
| Loss on drying | 3.0% Max | NMT 20 % |
| Iodates | Pass the test | Pass the test |
| Sulphate | 150 PPM Max | |
| Appearance of solution | Pass the test | |
| Heavy Metals | 10PPM Max | 0.001% Max |
| Organic volatile impurities | Pass the test | |
| Thiosulphates | Pass the test | Pass the test |
| Iron | 20 PPM Max | |
| Barium | Pass the test | |
| Potassium | Pass the test | |
| Nitrate, Nitrate & Ammonium | Pass the test |