Identification of aromatic amine functional group

Aim: To identify the functional group present in an organic compound.

Preliminary test:

(i) Physical State	Liquid
(ii) Colour	Red brown
(iii) Odour	Pungent like petrol
(iv) Solubility in water	Sparingly Soluble

Chemical Test:

S.No.	Experiment	Observation	Inference
1	Test for Unsaturation Dissolve 0.2 mL of organic compound in 2 mL CCl4. Then added bromine water dropwise.	Brown colour of bromine not discharged	Unsaturation is not present
2	Litmus Test: Put a drop of an aqueous solution of the original substance on a piece of red litmus paper	Red litmus turns blue	Organic substance is basic in nature.
3	Flame Test: Touch the organic substance on copper wire and ignite it	Sooty flame is produced	Compound is aromatic
4	Functional Group Analysis:       (i) Organic substance + conc. HCl + NaNO2 solution + ice cooled + β-naphthol solution (ii) KOH pallets + ethanol + heat + CHCl3 + Organic substance + heat	Red-orange colour is produced An unpleasant odour of carbylamine produced	Ar-NH2 group is present Ar-NH2 group is confirmed

                             

Result: The given organic compound contains the aromatic amine functional group.