Nicotinic acid, Stock solution system check EN12260

Naltrexone hydrochloride, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 16676-29-2

3'-Fluoro-2,2',4,5,5'-pentachlorobiphenyl, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no.

Fentanyl impurity A, 25mg