beta-Endosulfan, 100 µg/ml, Acetonitrile, 5ml

n-Tetracontane, ?13C: -27.05, 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-5, Cas.no. 4181-95-7

1-n-Octyl-2-phenylbenzmidazole, neat, Solvent-neat, Unit 10MG, # of units-7, Cas.no. 305347-15-3

25-Hydroxyvitamin D3-d6 (Dimethyl 26,27-d6)