EPA Method 528 Internal Standard Back Catalog number: 93188 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 682020 D4-Estrone, 10mg Price on request 3767.29-100-HX-X5 Stigmasterol, 100µg/mL, Solvent-n-hexane, Unit 1mL, # of units-5, Cas.no. 83-48-7 Price on request 50005 1-Chlorooctadecane Price on request