Acetanilide

Acetanilide, Perfumery Grade is an odorless solid chemical of leaf or flake-like appearance. Acetanilide is used as an inhibitor of hydrogen peroxide decomposition and is used to stabilize cellulose ester varnishes. It has also found uses in the intermediation in rubber accelerator synthesis, dyes and dye intermediate synthesis, and camphor synthesis.
Acetanilide is used for the production of 4-acetamidobenzenesulfonyl chloride, a key intermediate for the manufacture of the sulfa drugs. It is also a precursor in the synthesis of penicillin and other pharmaceuticals. Acetanilide is reported as used in fragrance compounds in 2008 (IFRA Fragrance Ingredient List3).
The perfuming properties of Acetanilide are also used to remove/mask unwanted odor from the product. When employed as a separate masking ingredient Acetanilide has to appear in the list of ingredients.