Main Constituents
The compound responsible for the characteristic aroma was identified as (–)-(S)-citronellal, which is contained in the leaf oil up to 80%; minor components include citronellol (10%), nerol and limonene.
From a stereochemical point of view, it is remarkable that kaffir lime leaves contain only the (S) stereoisomer of citronellal, whereas its enantiomer, (+)-(R)-citronellal, is found in both lemon balm and (to a lesser degree) lemon grass, (note, however, that citronellal is only a trace component in the latter's essential oil).
Kaffir lime fruit peel contains an essential oil comparable to lime fruit peel oil; its main components are limonene and β-pinene.
Read more about this topic: Kaffir Lime
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