595. Amsonic Acid

Nomenclature

CAS number: 81-11-8
2,2′-(1,2-Ethenediyl)bis[5-aminobenzenesulfonic acid]; 4,4′-diamino-2,2′-stilbenedisulfonic acid.
C14H14N2O6S2; mol wt 370.40.
C 45.40%, H 3.81%, N 7.56%, O 25.92%, S 17.31%.

Description and references

Prepn: Bender, Schultz, Ber. 19, 3234 (1886); H. E. Fierz-David, L. Blangey, Grundlegende Operationen der Farbenchemie (Springer-Verlag, Vienna, 7th ed., 1947) p 161; Spiegler, US 2784220 (1957 to du Pont).

Chemical structure

Properties

Yellow needles; very slightly sol in water. Forms sparingly water-sol, crystalline salts with many bisquaternary ammonium bases.

Use

In manuf of dyes, bleaching agents.