Method 1640 Tuning Standard Back Catalog number: 53147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92663 2-Methyl-1,3-butadiene Price on request 83611 Valeraldehyde-DNPH, 100µg/ml in Acetonitrile, 1ml Price on request 3510.12-100 Tetradifon, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 116-29-0 Price on request