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| Tolonium Chloride Toluidine Blue O | CI-52040 | Toluidine Blue | Blue O, Toluidine | Blue, Toluidine | CI 52040 | CI52040 | Chloride, Tolonium | O, Toluidine Blue A phenothiazine that has been used as a hemostatic, a biological stain, and a dye for wool and silk. Tolonium chloride has also been used as a diagnostic aid for oral and gastric neoplasms and in the identification of the parathyroid gland in thyroid surgery. |