7313. N-Phenylsulfanilic Acid

Nomenclature

CAS number: 101-57-5
4-(Phenylamino)benzenesulfonic acid; 4-diphenylaminesulfonic acid; p-anilinobenzenesulfonic acid.
C12H11NO3S; mol wt 249.29.
C 57.82%, H 4.45%, N 5.62%, O 19.25%, S 12.86%.

Description and references

Prepd by acetylation followed by sulfonation of diphenylamine: Merz, Weith, Ber. 6, 1512 (1873); Gnehm, Werdenberg, Z. Angew. Chem. 12, 1027 (1899); Sarver, Kolthoff, J. Am. Chem. Soc. 53, 1902 (1931).

Chemical structure

Properties

Leaves. Becomes blue on exposure to light. Soluble in water, in alcohol. Insol in ether. Dec into diphenylamine and sulfuric acid when heated above 200° with water contg hydrochloric acid.

Derivative

Sodium salt.

Nomenclature

CAS number: 6152-67-6
C12H10NNaO3S; mol wt 271.27.
C 53.13%, H 3.72%, N 5.16%, Na 8.47%, O 17.69%, S 11.82%.

Properties

Very sol in water.

Derivative

Potassium salt.

Nomenclature

CAS number: 6152-42-7
C12H10KNO3S; mol wt 287.38.
C 50.15%, H 3.51%, K 13.61%, N 4.87%, O 16.70%, S 11.16%.

Properties

Leaves; slightly sol in alcohol, very sol in water.

Derivative

Barium salt.

Nomenclature

CAS number: 6211-24-1
(C12H10NO3S)2Ba; mol wt 633.88.
C 45.47%, H 3.18%, N 4.42%, O 15.14%, S 10.12%, Ba 21.66%.

Properties

Leaflets; slightly sol in water. Poisonous.

Use

Colorimetric determination of nitrates; oxidation-reduction indicator; detection of oxidizing substances.