Practical 8
1. Formula for a Nappy Rash Product
Product: Zinc and Castor Oil Ointment
Formula:
Zinc oxide 20% w/w
Castor oil 20% w/w
White soft paraffin 60% w/w
2. Calculation of Ingredients for 100 g
For a total of 100 g:
Zinc oxide = 20 g
Castor oil = 20 g
White soft paraffin = 60 g
Total = 100 g
3. Ingredient List
Zinc oxide – 20 g
Castor oil – 20 g
White soft paraffin – 60 g
OR
Oleaginous / semi-solid barrier cream (paste-like ointment)
Zinc oxide – 7.5 g (7.5%)
Castor oil – 50 g (50%)
Cetostearyl alcohol – 2 g (2%)
White beeswax – 10 g (10%)
Arachis oil – 30.5 g (30.5%)
Total = 100 g