EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 73520 Phorate sulfone, 1000µg/ml in Acetonitrile, 1ml Price on request 684978 Bioresmethrin, 100 µg/ml, Ethyl acetate, 5ml Price on request 32042 Bromodichloromethane Price on request