EPA Method 515.1 Internal Standard Back Catalog number: 31023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676310 6-Propyl-2-thiouracil, 250mg Price on request 72188 Inositol Price on request 673266 Disulfoton-sulfone, 10.0 µg/ml, Acetonitrile, 10 Price on request