Assay of Sodium Benzoate 

Molecular formula: C6H5COONa 

Molecular Weight: 144.11 

Material required: Sodium benzoate: 0.6 g, glacial acetic acid: 100 mL, 0.1N perchloric acid and crystal violet. 

Procedure: Weigh accurately about 0.6 g of Sodium Benzoate, previously dried at 110°C and dissolved in 100 mL of glacial acetic acid, add 2 drops of crystal violet as an indicator, and titrate with 0.1N perchloric acid. Perform blank determination and make necessary corrections. 


Assay of Sodium Benzoate 

Factor Calculation: 

1 Mole of HClO4 1 Mole of sodium benzoate 

1000 mL of 1M HClO4 144.11 g of C6H5COONa

1 mL of 0.1N HClO4 ≅ 0.01441 g of C6H5COONa

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