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Methylthymol blue sodium salt is histological and hematological stain with a λmax of 438 nm.
M 2237 (OTTO) Methyl thymol blue, GR Cas 1945-77-3 - used as thymol-containing organic dye. M 2237 (OTTO) Methyl thymol blue, GR Cas 1945-77-3 - used as an indicator for complexometry.