Abstract: D-Camphorimido-methyl dithiocarbazate (Ⅰ)has been synthesized.It can condense with various aldehydes and keto-nes. Fourteen carbonyl derivatives of ( Ⅰ ) were prepared and their physical constantes have been determined.Except aliphatic aldehydes, most carbonyl compounds give stable crystalline derivatives with sharp melting points and definite specific rotations.Thus ( Ⅰ ) can be used as an optically active identification reagent for aromatic aldehydes, cyclic, aliphatic and aromatic ketones.