Reagents for scientific and medical research, namely, fluorescent stains, fluorescent dyes and conjugates of fluorescent dyes with biomolecules; chemical solutions for scientific and medical research comprised of conjugates of fluorescent dyes, a solvent and one or more of a co-solvent, pH buffer, salt or preservative; reagent kits for scientific and medical research comprised of solutions of conjugates and a solid phase for separations during use of the conjugates; reagent kits for scientifi...