EPA Method 524 & 624 - Internal Standard Back Catalog number: 19494 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675174 3,4-Dimethylphenol, 100 µg/ml, Methanol, 5ml Price on request 71924 Ethyl disulfide Price on request 41016 Dibenzo(a,h)anthracene, 100µg/ml in Acetonitrile, 1ml Price on request