DETECTABUSE® Norfentanyl 50ng/mL Positive & Negative levels

(2 X 5mL) Fentanyl POSITIVE (18400933) & NEGATIVE (19700000) Controls Biochemical Diagnostics DETECTABUSE® liquid urine controls are designed to monitor the performance of lateral flow, rapid disposable test devices. Designed to match most testing devices on the market, with formulations updated as market changes and new testing devices become available. Item requires refrigeration for product stability.