Diazepam tabs contain 92.5 to 107.5% of the stated amount of diazepam.

Twenty, 10mg diazepam tablets, weighing a total of 1..5426g were powdered and allowed to stand for 15 minutes. 140ml of 0.5%w/v solution of sulfuric acid in methanol was added, shaken for 15 minutes and sufficient methanolic sulfuric acid to produce 200ml was added. Following filtration, 10ml of the filtrate was diluted to 50ml with the same solvent. A . Taking the value of A (1%,1cm) as 450, calculate weight of C10H13CLN20 in 1 tablet and comment on the result.

Twenty, 10mg diazepam tablets, weighing a total of 1..5426g were powdered and allowed to stand for 15 minutes. 140ml of 0.5%w/v solution of sulfuric acid in methanol was added, shaken for 15 minutes and sufficient methanolic sulfuric acid to produce 200ml was added. Following filtration, 10ml of the filtrate was diluted to 50ml with the same solvent. A . Taking the value of A (1%,1cm) as 450, calculate weight of C10H13CLN20 in 1 tablet and comment on the result.

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