The present invention primarily concerns teeth cleaning compounds containing menthol for use with a toothbrush, preferably tooth pastes, tooth crèmes, tooth cleaning gels or tooth powders. Such a tooth cleaning compound according to the invention contains menthol and a quantity, for masking the bitterness of the menthol, of menthane carboxylic acid-N-(4-methoxyphenyl)-amide (WS-12) of the following formula (Ia), in particular of the following formula (Ib), i.e. L-menthane carboxylic acid-N-(4-methoxyphenyl)-amide.The present invention also concerns the use of menthane carboxylic acid-N-(4-methoxyphenyl)-amide (WS-12) of the formulas (Ia) or (preferably) (Ib) to mask the bitter taste of menthol in a teeth cleaning compound.The present invention also concerns a method for dissolving menthane carboxylic acid-N-(4-methoxyphenyl)-amide (WS-12) in a teeth cleaning compound and a method for masking the bitterness of menthol in a teeth cleaning compound.
