| 摘要 |
An oral hygiene composition in the form of a dentrifice or a mouthwash, comprising: (a) from 0.01 to 2% by weight of the composition of an antibacterial compound of formula (I): <CHEM> in which R<1> is oxygen, sulphur or an alkylene group of from 1 to 6 carbon atoms, each of R2 to R6 and R<2>' to R<6>' is hydrogen, hydroxyl or halogen; (b) from 0 to 90% by weight of a dentally acceptable abrasive, (c) from 0.1% to 15% by weight of a dialkali or tetra-alkali metal pyrophosphate salt or a mixture thereof and (d) water. o |
