A synthetic blue dye used chiefly as a stain in biology.
- Specimens were stained with toluidine blue and basic fuchsin.
- The matrix or ground substance of cartilage is strongly basophilic and stains metachromatically with toluidine blue and other similar basic dyes.
- Inactive DNA is readily stained with hematoxylin, toluidine blue, and other similar basic dyes.
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