402. Amido-R-Acid

Nomenclature

CAS number: 92-28-4
3-Amino-2,7-naphthalenedisulfonic acid; 2-naphthylamine-3,6-disulfonic acid.
C10H9NO6S2; mol wt 303.31.
C 39.60%, H 2.99%, N 4.62%, O 31.65%, S 21.14%.

Description and references

Prepd by treating 2-hydroxy-3,6-naphthalenedisulfonic acid with ammonium sulfite and ammonium hydroxide: Petitcolas, Josué, Bull. Soc. Chim. Fr. 1952, 89.

Chemical structure

Properties

Crystals or powder. Soluble in water. Solutions show a violet-blue fluorescence.

Use

Manufacture of dyes.