Title: p-Chlorobenzenesulfonic Acid
CAS Registry Number: 98-66-8
CAS Name: 4-Chlorobenzenesulfonic acid
Additional Names: closylate
Molecular Formula: C6H5ClO3S
Molecular Weight: 192.62
Percent Composition: C 37.41%, H 2.62%, Cl 18.41%, O 24.92%, S 16.65%
Literature References: Prepd by heating chlorobenzene with concd sulfuric acid or oleum under dehydrating conditions: Meyer, Ann. 433, 327, 333 (1923).
Derivative Type: 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.
Melting point: mp 67°
Boiling point: bp25 148°
Derivative Type: Sodium salt monohydrate
Molecular Formula: C6H4ClNaO3S.H2O
Molecular Weight: 232.62
Percent Composition: 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.
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