Methylhydrocarbons Mixture C5-C8 (+phytane/pristane) 13 Analytes, each 100 µg/mL in dichloromethane; unit: 1x4.5mL Certan® bottle Chiron No. Compound CAS No. 1231.5 2-Methylbutane [78-78-4] 1235.6 2-Methylpentane [10