1,7-Heptanedicarboxylic acid (Azelaic Acid), 250mg

4 Deuterated Compounds Internal Standard Mix 4 Analytes, each Wt.% as listed; units: 1x10mL, 5x10mL neat Name Wt.% Name Wt.% Benzene-d6 16.7 Naphthalene-d8 8.8 Ethylbenzene-d10 16.5 Toluene

4-Phenylphenol, 100 µg/ml, Acetonitrile, 5ml

Nitrite (NO2-) as N