hoạt chất

== Vietnamese == === Etymology === Sino-Vietnamese word from 活 and 質. === Pronunciation === (Hà Nội) IPA(key): [hwaːt̚˧˨ʔ t͡ɕət̚˧˦] (Huế) IPA(key): [hwaːk̚˨˩ʔ t͡ɕək̚˦˧˥] (Saigon) IPA(key): [waːk̚˨˩˨ cək̚˦˥] === Noun === hoạt chất active ingredient