EPA method 8270C calibration std kit

Vanillic acid, 100mg

(1S,2R,3S,4S)-rel-1,2,3,4-Tetrahydro-1,2,3,4-chrysenetetrol, , Solvent-, Unit , # of units-, Cas.no. 79356-06-2 (Unspecified sterochemistry)

Chloridazon, , Solvent-, Unit , # of units-, Cas.no. 1698-60-8