Eliminating such weapons is "a noble cause," the Organisation for the Prohibition of Chemical Weapons (OPCW)'s director general, Ahmet Uzumcu, said yesterday.
A handful of countries, including Israel, Egypt and North Korea, are not implementing a global ban watched over by the OPCW.
The Hague-based watchdog was thrust from obscurity into the spotlight this year because of its lead role in organising the destruction of Syria's chemical weapons, whose use nearly propelled the United States into a new Middle East war.
The body notably intends to use the eight million Swedish kronor (USD 1.2 million) that comes with the prize in the ceremony today to establish its own annual award.
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"Hopefully in the near future we will be able to do away with a whole category of weapons, chemical weapons," the chairman of the Norwegian Nobel Committee, Thorbjoern Jagland, said Monday.
The honour bestowed on the OPCW brings it into an elite group of people and organisations seen as having promoted peace in the world -- including Nelson Mandela, whose memorial service in South Africa was also held today.
More than 80 percent of declared chemical weapons have been destroyed.
But, as the OPCW itself underlines, the job is not yet complete.
Six states remain outside the convention: Israel and Myanmar have signed the pact but not ratified it, while Angola, Egypt, North Korea and South Sudan have failed to do either.
Uzumcu, a Turkish citizen, said yesterday: "I see no reason for any country" not to implement the convention.
Among convention members, the United States and Russia have both pledged to scrap their chemical weapons, but failed to meet a 2012 deadline to do so.
The OPCW's reception of its Nobel Peace Prize comes at a time when it faces its most logistically challenging task ever: destroying chemical weapons from Syria, which became a member in October.
Syria's hasty adherence to the convention averted strikes by US-led forces after a nerve gas attack that killed hundreds on the outskirts of Damascus on August 21.