102. N-Acetylsulfanilic Acid

Nomenclature

CAS number: 121-62-0
4-(Acetylamino)benzenesulfonic acid; N-p-acetylanilinosulfonic acid; acetanilidsulfonic acid; 4-acetamidobenzenesulfonic acid.
C8H9NO4S; mol wt 215.23.
C 44.64%, H 4.21%, N 6.51%, O 29.73%, S 14.90%.

Description and references

Prepd by the action of oleum or sulfuric acid on acetanilide in acetic anhydride: Junghahn, Neumann, Ber. 33, 1366 (1900); Sll, Stutzer, Ber. 42, 4539 (1909).

Chemical structure

Properties

Dihydrate, crystals. Freely sol in water, sol in alcohol, sparingly sol in glacial acetic acid, insol in ether. Slowly hydrolyzes in aq soln.

Derivative

Sodium salt.

Nomenclature

Cosaprin.
C8H8NNaO4S; mol wt 237.21.
C 40.51%, H 3.40%, N 5.90%, Na 9.69%, O 26.98%, S 13.52%.

Properties

Prisms, soluble in water, moderately sol in alcohol, insol in ether.

Derivative

Ethyl ester.
C10H13NO4S; mol wt 243.28.
C 49.37%, H 5.39%, N 5.76%, O 26.31%, S 13.18%.

Properties

Needles from benzene, mp 115°.