4-Hydroxy-2-butanone Back Catalog number: 73685 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11171.17-K-ME Dextrorphan tartrate,1000 µg base/mL,MeOH,1mL Price on request 94431 Volatile Standard Price on request 33541 Bromomethane, 20mg/ml in MeOH, 1ml Price on request