White Sodium Benzoate Flake has minimum 99.5% assay. The Benzoate has alkalinity of 0.1 mg, acidity of maximum 0.4 mg. The Benzoate has 1% loss on drying. The Benzoate has particle size from 2 to 5 micron. The White Sodium Benzoate Flake has heavy metals of maximum 6 mg/ kg.