Spokesman Michael Luhan told The Associated Press that the declaration is "being reviewed by our verification division." The organisation will not release details of what is in the declaration.
The OPCW, which polices the treaty outlawing chemical weapons, is looking at ways to fast-track moves to secure and destroy Syria's arsenal of poison gas and nerve agents as well as its production facilities.
However, diplomatic efforts to speed up the process are moving slowly. A meeting initially scheduled for Sunday at which the organisation's 41-nation executive council was to have discussed a US-Russian plan to swiftly rid Syria of chemical weapons was postponed today and no new date was immediately set.
Under a US-Russia agreement brokered last weekend in Geneva, inspectors are to be on the ground in Syria by November. During that month, they are to complete their initial assessment and all mixing and filling equipment for chemical weapons is to be destroyed.
All components of the chemical weapons program are to be removed from the country or destroyed by mid-2014.