Levulinic acid, 250mg

2,2',4,5,5'-Pentachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

Hydroxyisohexyl-3-cyclohexene carboxaldehyde, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 31906-04-4

(+/-)-Tebuconazole-d4 (4-chlorophenyl-d4),100 µg/mL,acetonitrile,1mL,