metachromatic dye

metachromatic dye

A dye—e.g., methylene blue, toluidine blue, safranine—capable of staining tissues with colours that differ from the dye itself.
References in periodicals archive ?
Toluidine blue which is considered a basic metachromatic dye with high affinity towards acidic tissues, stains the nuclei dark blue and the polysaccharides violet because of its strong binding capacity towards the nuclear material (DNA) in the nucleus and (RNA) in the cytoplasm (Sridharan & Shankar, 2012).
Metachromatic dye toluidine blue, which stains nuclear material in dysplastic epithelium, is widely used for screening of potentially malignant lesions.
Toluidine blue dye is an acidophilic metachromatic dye of the thiazine group.