Certain features of will be down for maintenance Saturday afternoon/evening, February 24th starting at 3:00 pm CT until 9:00 pm CT.

Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Detection Substrates

Enzyme-based detection systems for ELISA, immunohistochemistry and Western blotting include oPD, TMB, BCIP, pNPP, fast red, ABTS, DAB, chemiluminescence and many more. Sigma-Aldrich manufactures basic reagent powders as well as convenient solutions, and tablets. We also offer enhancers and stop solutions specifically formulated for optimal performance with our detection substrates.