Structural Formula Vector Image
Title: Hemipyocyanine
CAS Registry Number: 528-71-2
CAS Name: 1-Phenazinol
Additional Names: a-hydroxyphenazine; 1-hydroxy-5,10-diazoanthracene; pyoxanthose
Molecular Formula: C12H8N2O
Molecular Weight: 196.20
Percent Composition: C 73.46%, H 4.11%, N 14.28%, O 8.15%
Literature References: Found in old cultures of Pseudomonas pyocyanea. Isoln: Fordos, Compt. Rend. 56, 1128 (1863). Prepd from pyocyanine by the action of 2% NaOH: Wrede, Strack, Z. Physiol. Chem. 140, 12 (1924); by the reaction of pyrogallol monomethyl ether and o-phenylenediamine followed by demethylation of the formed a-methoxyphenazine: Surrey, Org. Synth. coll. vol. III, 753 (1955). Alternate syntheses: Hegedüs, Helv. Chim. Acta 33, 766 (1950); Vivian, Nature 178, 753 (1956).
Properties: Yellow needles from benzene, mp 159-160°. Sublimes easily in vacuo. Slightly sol in hot water; freely sol in the usual organic solvents except petr ether. Sol in aq alkaline solns with purplish-red color which turns yellow on neutralization. Forms red salts with mineral acids.
Melting point: mp 159-160°

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