EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677750 4-Ethylphenol, 100 µg/ml, Acetonitrile, 1ml Price on request 38376 RCRA - Soil 1,4-Dioxane Price on request 677351 Naphthalene, 10 µg/ml, Cyclohexane, 10ml Price on request