The Hague-based OPCW added that it expected more details from Syria in the coming days and had postponed a meeting planned for Sunday.
Syria was given a Saturday deadline to give a full list of its chemical arms.
The US, UK and France have accused Syrian government forces of carrying out the 21 August attack, in the Ghouta district, but President Bashar al-Assad has blamed rebel groups.
Separately, two Syrian rebel groups have agreed a ceasefire in the northern town of Azaz after two days of fighting that raised fears of a war within a war.
Meeting postponed
Michael Luhan, a spokesman for the Organization for the Prohibition of Chemical Weapons (OPCW), which is responsible for policing the treaty outlawing chemical arms, said Syria's submission was an "initial declaration".
Mr Luhan said it was now being examined by the organisation's technical secretariat but he declined to say what was in it.
A UN diplomat confirmed to Reuters that details had been submitted, adding: "It's quite long... and being translated."
The destruction of all of Syria's chemical weapons would then be completed by mid-2014.
The core members of the OPCW were expected to vote on the timetable next week.
However, the OPCW said in a statement on Friday that a meeting of its executive council scheduled for Sunday had been postponed, without giving a reason.
"We will announce the new date and time... as soon as possible," it said.
Latest News
LOADING LATEST NEWS....
Loading Blog Posts...
Loading Images...
Loading Videos...
- Unknown Updated at: Saturday, September 21, 2013
