EPA Method 515.1 - Performance Check Solution

pH 4.0 Standard @ 25°C, in water, 100ml

8 alpha,9ß,10 alpha(H),14ß(H),17 alpha(H),21ß(H)-5,9-Dimethyl-25,27-bisnorhopane , neat, Solvent-neat, Unit ca. 5µg, # of units-1, Cas.no.

Methyl methanesulfonate, Comet assay grade, , Solvent-, Unit , # of units-, Cas.no. 66-27-3