The preparation of salicylic acid from phenol

Potassium persulphate added to a
solution of salicylic acid and potassium hy-
droxide forms a crystalline compound
C H (CO K)OSO K
A solution of salicylic acid and borax
in water deposit crystals of a composition
4 10 7
Chloral forms with it at 140^^
^ 4 cue 5
In dilute aqueous solutions "bromine
water gives « a x>recipitate of C;.Hr;Br.O,
-^ -^ Oct
16.
Iodine and potash give a red pov.der GgH^KODCOgZ.
It forms compounds with casein,
fihrim and albuminoid, containing about 14;j of
the acid and having a foraiula — *^7E^11 ^^'18^^82
2C H . It melts at 40°, and is soluble in
7 6 S
water to an extent of ,0051 parts in 100 parts
of water.