Calculating Ingredient Amounts: Weight vs. Volume/Density
Asked by: tanda.pharma
On: October 04, 2015
Product Type:
Cosmetics
Question
I have an ingredient supplied in a syringe. When formulating, how should I measure it accurately?
- Is it necessary to transfer it to a measuring cylinder?
- Should I calculate the required amount based on weight or volume?
- Is the density information relevant for calculation?
Answer
Based on the staff's response:
- Calculating RM weight: For accurate formulation, you should always calculate based on weight only, not volume or density.
- Density information: The company has density information, but it is not recommended for formulation calculations because density can vary slightly between batches and with temperature. Using weight is more accurate.
The staff did not address your question about whether a measuring cylinder is needed if the product is supplied in a syringe.