EPA 1620 Standard 4 Back Catalog number: 53142 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 74219 Fenpropimorph, 1000μg/mL in Acetonitrile, 1ml Price on request 70867 Mercaptobenzothiazole Price on request HXCB Hexachlorobenzene, 1.2mL x 100ug/mL, nonane Price on request