The list of parties to weapons of mass destruction treaties encompasses the states which have signed and ratified, succeeded, or acceded to any of the major multilateral treaties prohibiting or restricting weapons of mass destruction (WMD), in particular nuclear, biological, or chemical weapons.
| Treaty | Year of entry into force | Number of States parties | Number of signatory states (signed but not ratified) | Objective |
|---|---|---|---|---|
| Geneva Protocol [1] | 1928 | 146 | 0 | Ban the use of biological and chemical weapons |
| Biological Weapons Convention [2] (parties) | 1975 | 184 | 4 | Comprehensively ban biological weapons |
| Chemical Weapons Convention [3] (parties) | 1997 | 193 | 1 | Comprehensively ban chemical weapons |
| Partial Nuclear Test Ban Treaty [4] (parties) | 1963 | 126 | 10 | Ban all nuclear weapons tests except for those conducted underground |
| Nuclear Non-Proliferation Treaty [5] (parties) | 1970 | 191 | 0 | 1. prevent nuclear proliferation; 2. promote nuclear disarmament; 3. promote peaceful uses of nuclear energy |
| Treaty on the Prohibition of Nuclear Weapons [6] (parties) | 2021 | 68 | 26 | Comprehensively ban nuclear weapons |
| Comprehensive Nuclear-Test-Ban Treaty [7] (parties) | not in force | 176 | 10 | Ban all nuclear weapons tests |
The following list was last updated in March 2021.
Legend:
The Treaty on the Non-Proliferation of Nuclear Weapons, commonly known as the Non-Proliferation Treaty or NPT, is an international treaty whose objective is to prevent the spread of nuclear weapons and weapons technology, to promote cooperation in the peaceful uses of nuclear energy, and to further the goal of achieving nuclear disarmament and general and complete disarmament. Between 1965 and 1968, the treaty was negotiated by the Eighteen Nation Committee on Disarmament, a United Nations-sponsored organization based in Geneva, Switzerland.
Arms control is a term for international restrictions upon the development, production, stockpiling, proliferation and usage of small arms, conventional weapons, and weapons of mass destruction. Historically, arms control may apply to melee weapons before the invention of firearm. Arms control is typically exercised through the use of diplomacy which seeks to impose such limitations upon consenting participants through international treaties and agreements, although it may also comprise efforts by a nation or group of nations to enforce limitations upon a non-consenting country.
The Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous or other Gases, and of Bacteriological Methods of Warfare, usually called the Geneva Protocol, is a treaty prohibiting the use of chemical and biological weapons in international armed conflicts. It was signed at Geneva on 17 June 1925 and entered into force on 8 February 1928. It was registered in League of Nations Treaty Series on 7 September 1929. The Geneva Protocol is a protocol to the Convention for the Supervision of the International Trade in Arms and Ammunition and in Implements of War signed on the same date, and followed the Hague Conventions of 1899 and 1907.
The Biological Weapons Convention (BWC), or Biological and Toxin Weapons Convention (BTWC), is a disarmament treaty that effectively bans biological and toxin weapons by prohibiting their development, production, acquisition, transfer, stockpiling and use. The treaty's full name is the Convention on the Prohibition of the Development, Production and Stockpiling of Bacteriological (Biological) and Toxin Weapons and on their Destruction.
The Conference on Disarmament (CD) is a multilateral disarmament forum established by the international community to negotiate arms control and disarmament agreements based at the Palais des Nations in Geneva. The Conference meets annually in three separate sessions in Geneva.
The Russian Federation is known to possess or have possessed three types of weapons of mass destruction: nuclear weapons, biological weapons, and chemical weapons. It is one of the five nuclear-weapon states recognized under the Treaty on the Non-Proliferation of Nuclear Weapons. Russia possesses a total of 5,889 nuclear warheads as of 2023, the largest confirmed stockpile of nuclear warheads in the world. Russia's deployed missiles number about 1,674, also the largest confirmed strategically deployed arsenal in the world as of 2023. The remaining weapons are either in reserve stockpiles, or have been retired and are slated for dismantling. Russia's predecessor state, the Soviet Union, reached a peak stockpile of about 45,000 nuclear warheads in 1986. The number of weapons Russia may possess is currently controlled by the bilateral New START treaty with the United States.
Biological weapons are pathogens used as weapons. In addition to these living or replicating pathogens, toxins and biotoxins are also included among the bio-agents. More than 1,200 different kinds of potentially weaponizable bio-agents have been described and studied to date.
Albania once possessed a stockpile of weapons of mass destruction. This stockpile of chemical weapons included 16,678 kilograms (36,769 lb) of mustard gas, lewisite, adamsite, and phenacyl chloride (chloroacetophenone).
A nuclear weapons convention is a proposed multilateral treaty to eliminate nuclear weapons. This might include prohibitions on the possession, development, testing, production, stockpiling, transfer, use and threat of use of nuclear weapons, such as those in the Treaty on the Prohibition of Nuclear Weapons, along with provisions for their verified elimination. It could be similar to existing conventions outlawing other categories of weapons, such as biological weapons, chemical weapons, anti-personnel mines and cluster bombs.
The 2010 Review Conference for the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) was held at United Nations Headquarters in New York City from 3 to 28 May 2010. The President of the Review Conference is Ambassador Libran N. Cabactulan of the Philippines. UN Secretary-General Ban Ki-moon used the opening of the conference to note that "sixty five years later, the world still lives under the nuclear shadow".
The Treaty on the Prohibition of Nuclear Weapons (TPNW), or the Nuclear Weapon Ban Treaty, is the first legally binding international agreement to comprehensively prohibit nuclear weapons with the ultimate goal being their total elimination. It was adopted on 7 July 2017, opened for signature on 20 September 2017, and entered into force on 22 January 2021.
