My question refers to a shampoo bar, in this example.
If there is a range given for the product’s ingredient, say 20 - 40% sodium cocoyl isethionate (SCI), what would be safe to assume is the ACTUAL % used in the product?
Personally, I would go with 20% SCI, so long as the total comes to 100% in my estimating calculation of each ingredient in the product, according to the ranges in its MSDS.
I realize this might be an ‘it depends’ question, but I figured real cosmetic chemists here would be able to give me a guide, versus me just assuming the LOWEST in the range given of an ingredient on its MSDS.
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