Butyl paraben is a preservative, not a fragrance material. It is essentially odorless, with at most a very faint waxy or phenolic nuance detectable only at high concentration. It contributes no meaningful olfactory character to a formulation.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 199.
White crystals or crystalline powder.
Almost insoluble in water, soluble in alcohol. Slightly soluble in oils.
Very faint odor.
Used as a preservative in cosmetic preparations at the concentration of 0.1 percent or less. Even at 0.05%, it may influence the effect of a given perfume to a certain degree, partly because it can be present at a concentration of 10 to 25 percent of the perfume itself thus becoming a significant factor in the fragrance performance. In general however, it will not seriously alter the fragrance.
Produced from Potassium salicylate via para-Hydroxybenzoic acid to the ester.