2122. p-Chlorobenzenesulfonic Acid

Nomenclature

CAS number: 98-66-8
4-Chlorobenzenesulfonic acid; closylate.
C6H5ClO3S; mol wt 192.62.
C 37.41%, H 2.62%, Cl 18.41%, O 24.92%, S 16.65%.

Description and references

Prepd by heating chlorobenzene with concd sulfuric acid or oleum under dehydrating conditions: Meyer, Ann. 433, 327, 333 (1923).

Chemical structure

Derivative

Monohydrate.

Properties

Crystals from water, mp 67°. The anhydr material is usually obtained as a syrup, bp25 148°. Sol in water, alc. Practically insol in ether, benzene.

Derivative

Sodium salt monohydrate.
C6H4ClNaO3S.H2O; mol wt 232.62.
C 30.98%, H 2.60%, Cl 15.24%, Na 9.88%, O 27.51%, S 13.78%.

Properties

Cubic crystals from water. Sol in water.