Uniformity of dosage units á905ñ
Open 10containers and accurately weigh each individual container and its contents,taking care to preserve the identity of each container.Remove the contents of each container by rinsing thoroughly with water,dry at 105

to constant weight,and reweigh.Calculate for each container the net weight of its contents by subtracting the weight of the dry,empty container from its initial gross weight.Determine the average weight of the contents and the relative standard deviation (see
Calculation of the Relative Standard Deviationunder
Uniformity of Dosage Units á905ñ).The requirements are met if the weight of the contents of each container does not deviate from the average weight by more than 5.0%and the relative standard deviation of the 10containers is not greater than 3.0%.If the requirements of the test are not met,test 20additional containers.The requirements are met if the net weight of not more than 1container of the 30deviates by more than 7.5%from the average weight of the contents of the 30containers and the relative standard deviation of the 30containers is not greater than 3.3%.