EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70943 Hexabromobenzene Price on request 38157 CWA Oxygenates Price on request 93389 Pentachlorophenol, 5000µg/ml in MeOH, 1ml Price on request