Crotonaldehyde-DNPH Back Catalog number: 83544 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 32711 2,3-Dimethylbutane Price on request 677577 L-Valine, 250mg Price on request 0943.18-K-IO 3-Methylheptadecane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 6418-44-6 Price on request