Sodium Benzoate BP
Sodium benzoate is the sodium salt of benzoic acid and exists in this form when dissolved in water.
Sodium benzoate is a preservative, with the E number E211. It is most widely used in acidic foods such as salad dressings (i.e. acetic acid in vinegar), carbonated drinks jams and fruit juices, pickles, condiments and frogurt toppings. It is also used as a preservative in medicines and cosmetics.
Chemical Name: Sodium Benzoate
Synonym: Benzoic acid, sodium salt
Molecular Formula: C7H5NaO2
Molecular Weight: 144.1 g/mol
CAS No.: 532-32-1
|Characters||It occurs as a white or almost white, crystalline or granular powder or flakes, slightly hygroscopic|
(a)It gives the reaction of benzoates
(b)It gives the reaction of sodium
|Solubility||Freely soluble in water, sparingly soluble in ethanol (90% V/V)|
|Appearance of solution||The solution is clear and not more intensely colored than the reference solution Y6|
|Acidity or alkalinity||Specified test|
Not more than 200 ppm
Not more than 300 ppm
|Heavy metals||Not more than 10 ppm|
|Loss on drying||Not more than 2.0%|
|Assay||Not less than 99.0% and not more than 100.5% (dried substances)|
Shelf life, Storage and Packing
It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.
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We observe WHO Good manufacturing practice and Good laboratory practice.