Interference Standard 4 Back Catalog number: 52041A Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 687606 Fenpropimorph, 250mg Price on request 15900-2660-100CY5 Hexachlorobenzene (HCB), 100µg/ml in CY, 5ml Price on request 10371.8-10MG Valproic acid-d6 Price on request