Carbylamine reaction: Primary amines (aliphatic or aromatic) when heated with chloroform and alcoholic KOH form isocyanides (carbylamines) with offensive odour. The reaction is given by: C₆H₅NH₂ + CHCl₃ + alc.KOH → (isocyanide). This reaction is used as a test for primary amines.

Diazotisation: The process of conversion of primary aromatic amines into diazonium salts by treatment with nitrous acid (NaNO₂ + HCl) at low temperature (0-5°C). Diazonium salts of aromatic amines are more stable than those of aliphatic amines.

Hofmann's bromamide reaction: Primary amide on treatment with bromine and aqueous NaOH gives primary amine with one carbon atom less than the amide. The reaction involves heating with Br₂ and KOH.

Coupling reaction: Aryldiazonium salts react with phenols or arylamines to form azo compounds. Coupling reaction of aryldiazonium salts with phenols or arylamines give rise to the formation of azo dyes.

Ammonolysis: The process of reaction of alkyl halides with ammonia to form amines.

Acetylation: Introduction of acetyl group (CH₃CO-) in amines using acetic anhydride or acetyl chloride. Reaction: C₆H₅NH₂ + (CH₃CO)₂O → (acetylated product).

Gabriel phthalimide synthesis: Used for preparing primary amines. Gabriel phthalimide synthesis is preferred for synthesising primary amines. Aromatic primary amines cannot be prepared by this method.