CAS 109-68-2 appears in our catalog under these names: 2-Pentene, cis + trans, 98% , 2-PENTENE, 99%, MIXTURE OF ISOMERS, 2-Pentene (cis- and trans- mixture), 95%, 2-Pentene (cis- and trans- mixture), >95.0%(GC). Offered by: Thermo Scientific (Alfa Aesar), Sigma-Aldrich, Fluorochem, TCI. Available pack sizes: 25g, 100g, 100mg, 1g, 200mg, 25ml, 100ml.