Verification II Standard 1 Back Catalog number: 52019 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C16990550 Sulfadimethoxine, certified, 0.25g Price on request 674008 Propanil, 10 µg/ml, Acetonitrile, 10ml Price on request 33258 Dalapon acid Price on request