Stabilized Romanowsky stain solution
AssigneeMiles Laboratories, Inc.
InventorsElaine A. Helfrich, Kin F. Yip
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Abstract
Disclosed is a Romanowsky stain having improved stability characteristics which comprises a methanol solution of Methylene Blue, an azure dye and the free acid of Eosin Y.
Claims4
A method for the preparation of a Romanowsky-type stain solution having improved stability characteristics which comprises dissolving in methanol a mixture of Methylene Blue, Azure A, Azure B, Azure C or a combination of these azure dyes and the free acid of Eosin Y in such amounts that the resulting solution exhibits spectrophotometric absorption of at least 230 optical density units at 645 nm and 128 optical density units at 525 nm.
A Romanowsky-type stain solution having improved stability characteristics which comprises a methanolic solution of Methylene Blue;
- Azure A, Azure B, Azure C or a combination of these azure dyes and the free acid of Eosin Y with the Methylene Blue and azure dye being present in a concentration which results in spectrophotometric absorption of at least 230 optical density units at 645 nm and the free acid of Eosin Y is present in an amount which results in spectrophotometric absorption of at least 128 optical density units at 525 nm.
Dependencies are inferred from the claim text.