EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4059-KIT Thiophene in Thiophene-free Benzene Units: 5x1mL in certan bottles, 10mL screw-capped bottle Chiron No. Concentration Light White Mineral Oil µg thiophene/g (20 cSt at 40°C) Price on request 1583.30-600-DPX5 Betulin, 600µg/mL, Solvent-diisopropyl ether, Unit 1mL, # of units-5, Cas.no. 473-98-3 Price on request LGCFOR1007.00 Mifepristone, 10mg Price on request