Calibration Standard Set Back Catalog number: 52032 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1930.8-1ML Heptafluorobutyric anhydride, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 336-59-4 Price on request 58147 Silver (Ag) Price on request 677759 DL-alpha-Tocopherol, 1000 µg/ml, Methanol, 1ml Price on request