Sodium benzoate C7H5NaO2 M = 144,11 g/mol EC No. 208-534-8 CAS No. 532-32-1 This is an international mail and delivery time can vary widely. Chemical Grade Definitions: Pure p.a - High purity analytical reagents. Suitable for laboratory and general use. Pharm/Food - Acceptable for food, drug or medicinal use. May be used for most laboratory purposes. Pure - Good quality chemicals. May be used for most laboratory purposes, educational, domestic, craft applications. Not pure enough to be offered for food. Technical - Good quality for educational, domestic, handicraft, agricultural applications. Not pure enough to be offered for food.