The Prime Minister has said that a UN resolution laying out a timetable for the destruction of Syria's chemical weapons stockpile would "test" Russia's resolve to follow through.
Mr Cameron told a panel of senior MPs at the House of Commons Liaison Committee: "If we can achieve the removal and the destruction of the biggest chemical weapons arsenal in the world, that would be a significant step forward".
But he voiced his earlier concerns that the proposal could be a "delaying tactic" and that any plan for disarmament must include a timetable and "consequences" if this was not kept to.
More top news
Two ambulances crashed leaving one driver dead and three people seriously injured.
A scandal-hit NHS trust where a teenager drowned in the bath is still failing to protect patients from risk of harm, a watchdog has found.
New research suggests metal-on-metal hip replacements implanted since 2006 are more prone to failure and they "fail in a much nastier way".