KPL ABTS 1-component microwell peroxidase substrate develops a blue-green product when reacted with horseradish peroxidase labeled conjugates in microwell plates or tubes. The expected appearance of
the solution is colorless to light green. Acceptable background absorbance of unreacted substrate is ≤0,025, as measured at 405 nm. KPL ABTS 1-component microwell peroxidase substrate is not suitable for membrane or immunohistochemical staining.