Interference Standard 3 Back Catalog number: 53050 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PN-41S 1,2,7,8-Tetrachloronaphthalene, 1.2mL x 50ug/mL, nonane Price on request 675939 D9-Butachlor, 10mg Price on request 679156 Clorsulon, 100mg Price on request