Tetradifon Back Catalog number: 70851 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72241 L-Proline Price on request 0174.18-500-IO 4-Phenyldibenzofuran, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 74104-10-2 Price on request 674448 Anthraquinone, 100 µg/ml, Acetonitrile, 5ml Price on request