4-n-Nonylphenol, 100 µg/ml, Methanol, 1ml

4-Aminoazobenzene, 100 µg/ml, Acetonitrile, 1ml

2,4,6-Trichloro[13C6]phenol, 1.2ml x 100ug/ml, isooctane

2-(2-Butoxyethoxy)ethanol