EPA Method 515.2Methyl Derivatives Back Catalog number: 30074 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 73303 Glyoxylic acid Price on request 94719 4-Aminoazobenzene Price on request 2126.12-100-IOX5 Arochlor 1242 , 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 53469-21-9 Price on request