Celestin Blue
Title: Celestin Blue
CAS Registry Number: 1562-90-9
CAS Name: 1-(Aminocarbonyl)-7-(diethylamino)-3,4-dihydroxyphenoxazin-5-ium chloride
Additional Names: 1-carbamoyl-7-(diethylamino)-3,4-dihydroxyphenazoxonium chloride; C.I. Mordant Blue 14; C.I. 51050; michrome no. 66
Trademarks: Corein 2R
Molecular Formula: C17H18ClN3O4
Molecular Weight: 363.80
Percent Composition: C 56.12%, H 4.99%, Cl 9.75%, N 11.55%, O 17.59%
Literature References: Prepd by the action of gallamide on N,N-diethyl-p-nitrosoaniline HCl: Gnehm, Bauer, J. Prakt. Chem. 72, 249 (1905); Grandmougin, Bodmer, ibid. 77, 502 (1908). See also: US 534809 (1895); US 1227407 (1917); Colour Index vol. 4 (3rd ed., 1971). Review: H. J. Conn's Biological Stains, R. D. Lillie, Ed. (Williams & Wilkins, Baltimore, 9th ed., 1977) pp 407-408.
Properties: Greenish-black powder. With water it yields a reddish-purple soln, which appears blue on extreme diln. The alcoholic soln is blue in all concns. Approximate soly in water 2.0%, abs ethanol 1.5%, Cellosolve 2.25%, ethylene glycol 6.5%, xylene 0.005%.
Use: To dye fabrics a navy-blue color with faint reddish tinge. As nuclear and connective tissue stain. One of the ingredients of Picro-Mallory stain: Lendrum, McFarlane, J. Pathol. Bacteriol. 50, 381 (1940).

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