Additional Internal Standard Solution, 1.2ml, toluene Back Catalog number: EPA-8280ISB Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended 18000-1810-100AN5 Metformin-HCl, 100µg/ml in Acetonitrile, 5ml Price on request 683839 4,4'-Dichlorobenzophenone, 100 µg/ml, Acetonitril Price on request 67034 Sucrose Calibration Mix Price on request