Cidex OPA Disinfectant Solution (20390). CIDEX OPA Solution is a convenient, ready-to-use, high-level disinfectant that provides a broad spectrum of kill. It is trusted by hospitals and physician offices all the world over for providing rapid, cost-effective high-level disinfection for a wide range of endoscopes and other healthcare instruments. It's a Glutaraldehyde-free (0.55% ortho-phthalaldehyde) high-level disinfecting solution. Rapid 5-minute soak time at in an automated endoscope reprocessor. Twelve-minute soak time for manual reprocessing. No activating or mixing needed. Minimizes exposure to fumes, odor or irritation. Long-lasting efficacy allows reprocessing of more devices per gallon than with Glutaraldehyde. Solution test strips sold separately. 1 Gallon. Price per gallon.