Introduction to Percent Weight in Weight


Percent weight in weight is one way of expressing concentration and is defined as below:

The % w/w of any component is the number of grams of that
component contained in 100 grams of the total product.



A sting relief cream including 2.0 %w/w Zinc Oxide
contains

2 grams of Zinc Oxide in 100 grams of the cream.

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Percent weight in weight is used to express the concentration of:
  1. solids in solid compositions
  2. solids in semi-solid formulations
  3. gases in liquids
  4. viscous liquids


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