Arsenic (As)

4'-Chloroacetanilide, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 539-03-7

7H-Perfluoro heptanoic acid, 100mg

Mono-n-butyl phthalate (ring-1,2-13C2, dicarboxyl-13C2, 99%) 100 µg/mL in MTBE, 1,2ml