EPA 1620 Standard 5 Back Catalog number: 53143 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 61242 Aroclor 1242 in Transformer Oil Price on request 681825 Didodecyldimethylammonium bromide, 100 µg/ml, Ace Price on request C12194800 4,4´-Diamino-3,3´-dimethyldiphenyl methane, certified, 0.1g Price on request