Isobutene Back Catalog number: 72431 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 12547.12-100-AN Bisphenol S-d8, 100µg/ml in Acetonitrile, 1ml Price on request 675549 Chloropropylate, 10.0 µg/ml, Acetonitrile, 10ml Price on request 30086 EPA Method 507/525 Analyte Mix #5 Price on request