2-Methyl-1-butene Back Catalog number: 72432 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-C Mass-Labelled PCDD/PCDF Internal Standard Solution, 1.2ml, nonane Price on request 683096 Sebuthylazin-desethyl, 100 µg/ml, Acetonitrile, Price on request 677342 Nonafluoro-1-butanesulfonic acid, 50 µg/ml, Metha Price on request