EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3309.19-100-CY Allethrin Price on request 677932 2,4,5-T-methyl ester, 100 µg/ml, Acetonitrile, 1 Price on request DF-IS-F Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane Price on request