Trypan blue excellent quality manufacturer, exporter and supplier. Trypan blue is an azo dye that is used as a dye stuff. It is a direct dye for cotton textiles. In biosciences, it is used as vital stain to selectively colour dead tissues or cells blue. It may be used to observe fungal hyphae and stramenopiles. Trypan blue is also used in ophthalmic cataract surgery to stain the anterior capsule in the presence of a mature cataract, to aid in visualization, before creating the continuous curvilinear capsulorhexis.