Nicotinic acid, Stock solution system check EN12260

8'-Apo-8-ß-caroten-8'-al, neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no. 1107-26-2

Chlorpyrifos-methyl, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 5598-13-0

2,2',3,4',5'-Pentachloro-4-methoxybiphenyl, 1.2ml x 50ug/ml, nonane