Nicotinic acid, Stock solution system check EN12260

1,3,5-Triazine-2,4,6-triamine (Melamine), neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 108-78-1

Aroclor 1242

1,2-Dichloroethane, 100 µg/ml, Methanol, 5ml