Components that have no technical or functional effect in a blend of various ingredients (e.g. stabilizers, preservatives etc.) do not have to be listed on the label of a finished product. Such ingredients are regarded as "incidental ingredients" by the FDA cosmetic labeling rules § 701.3(1). For examples, you don't need to list water and glycerin on your label when you add a botanical extract to your products, since water and glycerin don't have a function but are just solvents. Therefore, it is usually not necessary to know the exact composition of ingredient blends.
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