4-Hydroxy-2-butanone Back Catalog number: 73685 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9193.19-10MG Nortriptyline-d3 hydrochloride (N-methyl-d3) Price on request 94123 EPA Method 8310 Surrogate Standard Price on request 80401 EPA Method 8040A - Analytes Mix “A”, 2000µg/mL in 2-propanol, 1ml Price on request