EPA Method 8141 / 1618 Pesticide Mix B Back Catalog number: 91398 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 682090 Crotonic acid, 100mg Price on request 72729 4-Isobutylbenzoic acid Price on request L20015600IO PCB No. 156, 10µg/ml in Isooctane, 10ml Price on request