A fluorescent compound, produced by the oxidation of thiamin; used in methods for detection and determination of thiamin.
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thio·chrome 'thī-ə-.krōm n a yellow crystalline tricyclic alcohol C12H14N4OS found in yeast, formed by oxidation of thiamine, and giving a blue fluorescence under ultraviolet light that serves as the basis of a method of determining thiamine
Medical dictionary. 2011.