EPA Method 525 - Internal Standard Back Catalog number: 30031 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2922.10-100-IO 2-(4-Chloro-2-methylphenoxy-d3)propionic acid, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 352431-15-3 Price on request 12006.10-100-ME (+/-)-Metanephrine-?,ß,ß-d3 hydrochloride,100 µg base/mL,MeOH,1mL, Price on request MDF-123468 1,2,3,4,6,8-Hexachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene Price on request