EPA Method 525.2 Standard Back Catalog number: 92693 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10249.13-50-ME 2,4-Dihydroxybenzophenone-13C6, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 131-56-6 (unlabelled) Price on request P-468S-CN Thifensulfuron methyl, 100μg/mL in Acetonitrile, 1ml Price on request 57281 Thallium (Tl) Price on request