Rows sharing a CAS. Sharing a CAS does not mean same substance. A group usually needs more than one pass: merge the exact duplicates, keep a solid and a solution apart because UN1823 and UN1824 are different shipping descriptions, and clear a CAS that is a constituent rather than an identity. Tick the rows an action applies to — everything else in the group is left alone, and the group stays open until every row has an outcome. Rows on a drum are listed first and ticked by default.