In a statement, the Organisation for the Prohibition of Chemical weapons (OPCW) said the declaration was submitted three days ahead of schedule.
OPCW inspectors are also due to complete visiting the last four of 23 weapons sites declared by Syria.
The OPCW's mission was set up following outrage at a chemical weapons attack near the Syrian capital in August.
Sixty inspectors have been in Syria since 1 October. The OPCW, which is based in The Hague, said on Friday that its  team in Syria had visited 19 of the 23 sites disclosed by Syria.
Chemical stockpile
How to destroy chemical arsenal
Q&A: Disarmament deal
21 August attack: What we know
Under the UN resolution which set up the mission, Syria's chemical weapons production equipment must be destroyed by 1 November and stockpiles must be disposed of by mid-2014.
The organisation's work in Syria marks the first time the international chemical weapons watchdog - which won this year's Nobel Peace Prize - has been asked to oversee the destruction of a weapons armoury during a conflict.
More than 100,000 people have been killed in the fighting that has ravaged Syria for two-and-a-half years, according to the UN.
More than two million people have fled Syria and some 4.5 million have been forced from their homes within the country.
Casualty figures vary for the chemical weapons attack on the Ghouta agricultural belt around Syria's capital, Damascus, on 21 August.
It was estimated to have killed hundreds of people. The United States and other Western powers blamed the attack on President Bashar al-Assad's forces.
But Mr Assad accuses Syrian rebels of being behind it.

Police say they are investigating allegations of a secret price-fixing arrangement by companies who organise the trips for students.
Investigators have raided the homes of executives and frozen bank accounts.
At least six travel agencies are accused of violating competition rules.
They are suspected of colluding on prices before responding to an education ministry tender to take students to Holocaust memorials.
When the Israeli education ministry approached a number of different companies, it received identical quotes.
Reports say the alleged collusion was aimed at artificially inflating prices.
Drone video shows the Auschwitz-Birkenau concentration camp
Why did ordinary people commit atrocities in the Holocaust?
The Holocaust year by year
Thousands of Israeli high school students travel to memorials at World War Two death camps every year. A trip can cost several thousand shekels per student (1,000 shekels is worth Â£177), according to reports in Israeli media.
The BBC's Kevin Connolly, in Jerusalem, says that for many Israeli high school students a visit to the site of the Nazi death camps in southern Poland is a rite of passage, which gives them a direct sense of connection to the Holocaust - the defining tragedy of modern Jewish history.
If the allegations are proved to be true, our correspondent adds, there will be shock in Israel that a form of tourism that is viewed with great solemnity may have been the subject of illegal business practices.
Some six million Jews were murdered by the Nazis during the Holocaust, mainly in death camps in occupied Poland. More than a million people, mostly Jews, were killed in Auschwitz alone.
Syria has handed in a plan for the destruction of its chemical weapons to the watchdog monitoring the process.
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Nine executives at Israeli travel agencies have been arrested on suspicion of fixing the price of high school students' trips to former Nazi death camps, including Auschwitz.