Aldehydum
Aldehyda substantiae habent formula chemica structura simplica: RHO.

Aldehyda exempli causa sunt Alkanal et Alkenal.

Alkanal:
 Methanal
 Ethanal
 Propanal

Alkenal:
 Hexenal

 Saccharidum

Notae 

Chemica
Composita chemica
Aldehydum