Tolonium chlorideToluidine blue Otoluidine blue OToluidinblauC.I. 925C.I. 52040basic blue 17Blutene chlorideDimethyltoluthionine chloridetoloni chloridumtolonium chlorideC.I. Basic Blue 17Toluidene Blue O Chloride3-Amino-7-(dimethylamino)-2-(methylphenazathionium) chloridetoluidine blue
An organic chloride salt having 3-amino-7-(dimethylamino)-2-methylphenothiazin-5-ium (tolonium) as the counterion. It is a blue nuclear counterstain that can be used to demonstrate Nissl substance and is also useful for staining mast cell granules, both in metachromatic and orthochromatic techniques.