17a-Ethinylestradiol, certified, 0.25g Back Catalog number: C13245100 Availability: In the manufacturer's stock Price on request - + Recommended 31491 1,2,4-Trimethylbenzene Price on request 1501.24-K-IO n-Octadecylcyclohexane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 4445-06-1 Price on request 2127.12-K-IOX5 Arochlor 1248 , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 12672-29-6 Price on request