Stains, Fluorescent Dyes & Histology Reagents

Microscopy relies on contrast, and stains supply it by binding selectively to cell structures or reacting with specific groups. This sub-category holds classical histology dyes, fluorescent probes and chromogenic reagents. Sample products include 1,1'-Diethyl-4,4'-carbocyanine iodide used as a membrane and photographic sensitising dye, 1-(2-Thiazolylazo)-2-naphthol as a metal-sensitive chromophore, and 1,1,4,4-Tetraphenyl-1,3-butadiene, a blue-emitting wavelength shifter.

When choosing a stain, look at dye content as well as purity, because many dyes are sold as salts or mixtures where only part of the mass is the active chromophore. For fluorescent work, check excitation and emission maxima against your filter set. Certification by a stain commission is required in some diagnostic settings, so confirm this need before ordering.

Dyes are packed in light-proof containers in gram quantities, with larger packs for laboratories making their own staining solutions. Each lot ships with a COA, and ready-made solutions for clinical use sit in the Biochemicals division.