Di-n-propyltin dichloride, 25mg

Custom BTEX mixture, variation of S-4218 6 components, each concentration as described below in methanol 1300.6 Benzene, 3000µg/mL 1264.7 Toluene, 3000µg/mL 1268.8 Ethylbenzene, 300µg/mL 1265.8 p-Xylene, 300µg/mL 1266.8m-Xylene, 300µg/mL 1267.8 o-X

2,2’,3,4,6’-Pentachlorobiphenyl (89)

n-Propyl acetate,1000 µg/mL,MeOH,1mL,