EPA Method 8260B Internal Standard

1,4-Dimethyl-2-ethylbenzene, 1000µg/mL, Solvent-hexane, Unit 1mL, # of units-1, Cas.no. 1758-88-9

Promethazine-D3 HCl, 0.1mg/ml in Dimethyl Sulfoxide, 1ml

Erythromycin, 100mg