also: わにりん
noun
vanillin
Refers to the organic compound vanillin, the primary component of vanilla bean extract, used as a flavoring agent.
バニリンはバニラの香りの主成分です。
Vanillin is the main component of vanilla's aroma.
このお菓子には合成バニリンが使われている。
Synthetic vanillin is used in this confectionery.
バニラ refers to vanilla as a whole (the plant, bean, or flavor), while バニリン specifically denotes the chemical compound vanillin.
Loanword from English 'vanillin', ultimately derived from 'vanilla'.