Back Aldehied Afrikaans ألدهيد Arabic Aldehídu AST Aldehidlər Azerbaijani آلدهید AZB Aldehido BCL Альдэгіды Byelorussian Альдэгіды BE-X-OLD Алдехид Bulgarian অ্যালডিহাইড Bengali/Bangla
An aldehyde (/ˈældɪhaɪd/) is an organic compound. It contains a formyl group. A formyl group is a part of a molecule with the structure R-CHO. It is made of a carbon double bonded to oxygen. The carbon is also bonded to hydrogen and an R group.[1] A side chain is the rest of the molecule. The group without the side chain is called the aldehyde group or formyl group. Aldehydes are different from ketones because the formyl group is at the end of the molecule in an aldehyde. Ketones have the formyl group in the middle of the molecule. Aldehydes are common in organic chemistry. Many fragrances (smell producing compounds) are aldehydes.