4-Amino-2´,3-dimethylazobenzene, certified, 0.25g

2378-TCDD Specificity Mix for DB5/BP5/HP2/Rtx-5/SPB-5 , 1.2ml, nonane

Dialy Quality Control Standard (with Internal Standard) 3 Analytes, each Vol.% as listed in isooctane; units: 1x10 mL, 5x10mL. Name Vol.% Benzene 0.64 Toluene 4.8 Isooctane 90.56Methylethylketone (Int.Std.) 4.0

Dibenzothiophene Cocktail 5 Analytes, each concentration as listed in isooctane; units: 1x1mL Relative ratios Chiron No. Name CAS No.