EPA Method 515.1 Internal Standard Back Catalog number: 30023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673135 2,4-Dichlorophenol, 250mg Price on request 10529.9-1G Indole-3-carbinol Price on request 679276 Benzo[b]fluoranthene, 10mg Price on request