1300.6 Benzene [71-43-2] 5.00, 2.50, 1.25, 0.67, 0.33, 0.12, 0.06 vol.% 1264.7 Toluene [108-88-3] 20.00, 15.00, 10.00, 5.00, 2.50, 1.00, 0.50 vol.% 1371.4 2-Butanone (MEK) (Int. Std.) [78-93-3] 4.0, 4.0, 4.0 ,4.0, 4.0, 4.0, 4.0 vol.%