Amido-R-Acid

Title: Amido-R-Acid
CAS Registry Number: 92-28-4
CAS Name: 3-Amino-2,7-naphthalenedisulfonic acid
Additional Names: 2-naphthylamine-3,6-disulfonic acid
Molecular Formula: C10H9NO6S2
Molecular Weight: 303.31
Percent Composition: C 39.60%, H 2.99%, N 4.62%, O 31.65%, S 21.14%
Literature References: Prepd by treating 2-hydroxy-3,6-naphthalenedisulfonic acid with ammonium sulfite and ammonium hydroxide: Petitcolas, Josué, Bull. Soc. Chim. Fr. 1952, 89.
Properties: Crystals or powder. Soluble in water. Solutions show a violet-blue fluorescence.
Use: Manufacture of dyes.
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