Roxithromycin-d7, 2,5mg

Methanol QC Reference Mixture III n-Butyl sulfide, 0.5 ppm (weight S by weight) in 99.9 % methanol; units: 10x10mL

Ecgonine methyl ester, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no.

1,2,3-Trichlorodibenzo-p-dioxin,50 µg/mL,n-nonane,1mL,