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weight-weight concentrations

by almaz

Zonalon cream contains 1.5g of doxepin HCI with 28.5g of a cream base. what is the concentration of zonalon?

Comments for weight-weight concentrations

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Zonalon Cr Concentration
by: Brad Wojcik, Pharm D

This is a w/w percentage problem. You have 1.5 g of active ingredient in a total of 30 g (1.5 g + 28.5 g). 1.5 g/30 g. To change to a percentage, multiply by 100%. (1.5 g/30 g)(100%) = 5% w/w

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