Fundamental Organic Chemistry

OH
2-Resorcinol
OH
Resorcinol is solid ,dissolve in water and alcohol but in soluble in benzene.
Test Observation Result
1-Ferric chloride test:
Diluted solution of resorcinol in alcohol then
add 2 drop of FeCl 3 .
Deep violet color
appear
The compound
from phenols
2-Azo dye formation test:
Take 3 test tube
Tube (1): 1ml of aniline + 3.5ml of conc. HCl
Tube (2): 1ml of sodium nitrite NaNO 2
Tube (3): resorcinol dissolved in excess NaOH.
Red dye The dye is
Benzene azo
resorcinol
Keep the 3 test tube in ice bath & Put tube
(2) (1) slowly, then add mixture to tube (3).
3-Chloroform test :
1ml of resorcinol dissolved in excess 20% NaOH
+1ml of chloroform CHCl 3 then heat in water bath
Red fluorescent Compound is
resorcinol
4-Phethalen test:
In dry test tube add 0.5gm of resorcinol
+ 0.5 gm of phthalic anhydride +2drop of
conc.H 2 SO 4 , and gently fuse together allow to
cool , and then add 30% NaOH solution in excess
Red fluorescent
in the inner &
Green fluorescent
in the wall.
Compound is
resorcinol
72