Fentanyl impurity A, 25mg Back Catalog number: 666 Availability: In the manufacturer's stock Price on request - + Recommended 674826 Fenamiphos-sulfone, 50mg Price on request 1125.20-K-IO 1,3-Diphenylbenzo[c]thiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 16587-39-6 Price on request 71475 Dimethyl methylphosphonate Price on request