EPA Method 524 & 624 - Internal Standard Back Catalog number: 19494 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50818 Color Price on request 10641.15-10MG RPA 202248 (a metabolite of isoxaflutol), 10mg Price on request 12118.5-10MG Dimetridazole,neat,neat,10mg, Price on request