Which Amine Gives Azo Test – primary aromatic amine (Aniline).

Which amine gives azo test?

Yes, it is true only primary aromatic amine gives azo test just because, when primary aromatic amine react with nitrous acid (HNO2) then it gives diazonium salt. now, diazonium salt also react with phenol (it is coupling reaction) then finally primary aromatic amine gives coloured compound (dyes).

these are the best common methods of preparation of diazonium salts is by reacting nitrous acid with primary aromatic amine.

the reaction of primary aromatic amine with nitrous acid, as a result diazonium salt is formed. this is also called benzene diazonium chloride.

then diazonium salt is react with a phenol to give azo dye. this reaction is called coupling reaction.

therefore, we can say that with above information, primary aromatic amine gives azo test.

What is azo dye?

which amine gives azo test

Azo dyes are contain azo function group (N=N). this dyes are chemical class of dyes. this dye are highly organic compounds. azo dyes are soluble in water. azo dyes are easily dissolve in water.


this dyes have some important colouring Function property. this is the reason it gives good colour (shade) on materials. azo dyes are windly used for the dyeing of cellulose materials as well as polyester materials. this dyes are produced strong colour with good depth of shade on to the materials.

What is the difference between primary aliphatic amine and primary aromatic amine?

Primary aliphatic amine – aliphatic amine is one type of amine compound in which nitrogen bound to alkyl groups.

Primary aromatic amine – aromatic amine is one type of amine compounds in which nitrogen is bound to at least one of the aryl groups. there are no any aromatic rings directly on the nitrogen atoms.

What is the difference between amine and amide? and what will be types and uses?

Amine – amine have no carbonyl group in their structure. attached to the nitrogen group.

types – (a) primary amine

(b) secondary amine

(c) tertiary amine

(d) cyclic amines

Uses – (a) water purification

(b) manufacturing of medicine

(c) medical industry

Amide – amides have a carbonyl group attached to a nitrogen group.

types – (a) Polyamide

(b) sulfonamide

(c) urea

(d) carboxamide

Uses – (a) intermediates

(b) stabilizers

(c) surfactants

1 Comment

Paris Gehlbach · October 11, 2022 at 1:24 pm

Great info. Lucky me I came across your blog by accident (stumbleupon). I’ve bookmarked it for later!

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