WS PAH Benzo(a)pyrene Back Catalog number: 38033 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673047 Hexadecyltrimethylammonium bromide, 250mg Price on request 91941 Methylene dithiocyanate Price on request 63003 4-Chlorobiphenyl (3) Price on request