This is Bitrex (denatonium benzoate), the most bitter-tasting compound known — used as a denaturant in perfumer's alcohol rather than for its smell. It is essentially odorless on a blotter, contributing no meaningful olfactory character to a formula.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 136.
It is a white powder.
Slightly soluble in water, soluble in alcohol and some oils.
Practically odorless, but the observer will find an extremely powerful effect of bitter taste in the mouth even after very careful smelling of this material, or just after opening a container of it.
The taste is intensely bitter, and perceptible at concentrations well below 1 ppm.
This material has no use as an active ingredient in food flavors.