EPA Method 548.1 Analyte Back Catalog number: 30177 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673059 Chloral hydrate, 250mg Price on request 680842 Azobenzene, 100 µg/ml, Cyclohexane, 1ml Price on request I721500 3-Iodo-L-thyronine, 10mg Price on request