EPA Method 515.1 Internal Standard Back Catalog number: 30023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 82414 EPA Method 8240 - Alcohol Standard Price on request 677110 D4-Quinoxyfen, 100 µg/ml, Acetonitrile, 1ml Price on request 73478 2,6,?,?-Tetrachlorotoluene Price on request