Isobutene Back Catalog number: 72431 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679705 13C3-Atrazine-desethyl-desisopropyl, 10mg Price on request 10009R CLP Semi-Volatile Internal Standard Price on request 92072 Pyrene, 100µg/ml in Acetonitrile, 1ml Price on request