The Organization for the Prohibition of Chemical Weapons (OPCW), head quartered in the Hague, has carried out over 200 inspections in 25 countries and received declarations detailing chemical weapons-related activities, materials or stockpiles in eleven states. As of the end of April, eight states have declared information on chemical weapons production facilities: the United States, China, France, India, Japan, Russia, the United Kingdom and South Korea. (Japan declared the chemical weapons production facility formerly used by the Aum Shinrikyo cult.)
Ten states have declared the existence of old or abandoned chemical weapons: the United States, Belgium, China, France, Germany, India, Italy, Japan, Russia and the United Kingdom. Four states have declared plans for the destruction of chemical weapons stockpiles: the United States, India, Russia and South Korea—with only the U.S. program currently in large-scale operation.
Key non-signatories to the CWC include Iraq, Libya, North Korea and Syria, which were listed in the Department of Defense's 1997 "Proliferation: Threat and Response" report as states of CW proliferation concern.
—For more information, contact ACA.
| Country | Date of Signature | Date of Ratification/ Accession |
| Afghanistan | 1/14/93 | |
| Albania | 1/14/93 | 5/11/94 |
| Algeria | 1/13/93 | 8/14/95 |
| Argentina | 1/13/93 | 10/2/95 |
| Armenia | 3/19/93 | 1/27/95 |
| Australia | 1/13/93 | 5/6/94 |
| Austria | 1/13/93 | 8/17/95 |
| Azerbaijan | 1/13/93 | |
| Bahamas | 3/2/94 | |
| Bahrain | 2/24/93 | 4/28/97 |
| Bangladesh | 1/14/93 | 4/25/97 |
| Belarus | 1/14/93 | 7/11/96 |
| Belgium | 1/13/93 | 1/27/97 |
| Benin | 1/14/93 | |
| Bhutan | 4/24/97 | |
| Bolivia | 1/14/93 | |
| Bosnia- Herzegovina | 1/16/97 | 2/25/97 |
| Brazil | 1/13/93 | 3/13/96 |
| Brunei Darussalam | 1/13/93 | 7/28/97 |
| Bulgaria | 1/13/93 | 8/10/94 |
| Burkina Faso | 1/14/93 | 7/8/97 |
| Burundi | 1/15/93 | |
| Country | Date of Signature | Date of Ratification / Accession |
| Cambodia | 1/15/93 | |
| Cameroon | 1/14/93 | 9/16/96 |
| Canada | 1/13/93 | 9/16/96 |
| Cape Verde | 1/15/93 | |
| Central African Rep. | 1/14/93 | |
| Chad | 10/11/94 | |
| Chile | 1/14/93 | 7/12/96 |
| China | 1/13/93 | 4/25/97 |
| Colombia | 1/13/93 | |
| Comoros | 1/13/93 | |
| Congo | 1/15/93 | |
| Cook Islands | 1/14/93 | 7/15/94 |
| Costa Rica | 1/14/93 | 5/31/96 |
| Cote d'Ivoire | 1/13/93 | 12/18/95 |
| Croatia | 1/13/93 | 5/23/95 |
| Cuba | 1/13/93 | 4/29/97 |
| Cyprus | 1/13/93 | |
| Czech Republic | 1/14/93 | 3/6/96 |
| Denmark | 1/14/93 | 7/13/95 |
| Djibouti | 9/28/93 | |
| Dominica | 8/2/93 | |
| Dominican Republic | 1/13/93 | |
| Country | Date of Signature | Date of Ratification / Accession |
| Ecuador | 1/14/93 | 9/6/95 |
| El Salvador | 1/14/93 | 10/30/95 |
| Equatorial Guinea | 1/14/93 | 4/25/97 |
| Estonia | 1/14/93 | |
| Ethiopia | 1/14/93 | 5/13/96 |
| Fiji | 1/14/93 | 1/20/93 |
| Finland | 1/14/93 | 2/7/95 |
| France | 1/13/93 | 3/2/95 |
| Gabon | 1/13/93 | |
| Gambia | 1/13/93 | |
| Georgia | 1/14/93 | 11/27/95 |
| Germany | 1/13/93 | 8/12/94 |
| Ghana | 1/14/93 | 7/9/97 |
| Greece | 1/13/93 | 12/22/94 |
| Grenada | 4/9/97 | |
| Guatemala | 1/14/93 | |
| Guinea | 1/14/93 | 6/9/97 |
| Guinea-Bissau | 1/14/93 | |
| Haiti | 1/14/93 | |
| Holy See | 1/14/93 | |
| Honduras | 1/13/93 | |
| Hungary | 1/13/93 | 10/31/96 |
| Country | Date of Signature | Date of Ratification / Accession |
| Iceland | 1/13/93 | 4/28/97 |
| India | 1/14/93 | 9/3/96 |
| Indonesia | 1/13/93 | |
| Iran | 1/13/93 | 11/3/97 |
| Ireland | 1/14/93 | 6/24/96 |
| Israel | 1/13/93 | |
| Italy | 1/13/93 | 12/8/95 |
| Jamaica | 4/18/97 | |
| Japan | 1/13/93 | 9/15/95 |
| Jordan | N/A | 10/29/97 |
| Kazakhstan | 1/14/93 | |
| Kenya | 1/15/93 | 4/25/97 |
| Korea, South | 1/14/93 | 4/28/97 |
| Kuwait | 1/27/93 | 5/29/97 |
| Country | Date of Signature | Date of Ratification / Accession |
| Kyrgyzstan | 2/22/93 | |
| Laos | 5/13/93 | 2/25/97 |
| Latvia | 5/6/93 | 7/23/96 |
| Lesotho | 12/7/94 | 12/7/94 |
| Liberia | 1/15/93 | |
| Liechtenstein | 7/21/93 | |
| Lithuania | 1/13/93 | 4/15/98 |
| Luxembourg | 1/13/93 | 4/15/97 |
| Macedonia | N/A | 6/20/97 |
| Madagascar | 1/15/93 | |
| Malawi | 1/14/93 | |
| Malaysia | 1/13/93 | |
| Maldives | 10/4/93 | 5/31/94 |
| Mali | 1/13/93 | 4/28/97 |
| Malta | 1/13/93 | 4/28/97 |
| Marshall Islands | 1/13/93 | |
| Mauritania | 1/13/93 | 2/9/98 |
| Mauritius | 1/14/93 | 2/9/93 |
| Mexico | 1/13/93 | 8/29/94 |
| Micronesia | 1/13/93 | |
| Moldova | 1/13/93 | 7/8/96 |
| Monaco | 1/13/93 | 6/1/95 |
| Mongolia | 1/14/93 | 1/17/95 |
| Morocco | 1/13/93 | 12/28/95 |
| Myanmar (Burma) | 1/14/93 | |
| Country | Date of Signature | Date of Ratification / Accession |
| Namibia | 1/13/93 | 11/24/95 |
| Nauru | 1/13/93 | |
| Nepal | 1/19/93 | 11/18/97 |
| Netherlands | 1/14/93 | 6/30/95 |
| New Zealand | 1/14/93 | 7/15/96 |
| Nicaragua | 3/9/93 | |
| Niger | 1/14/93 | 4/9/97 |
| Nigeria | 1/13/93 | |
| Norway | 1/13/93 | 4/7/94 |
| Oman | 2/2/93 | 2/8/95 |
| Pakistan | 1/13/93 | 10/28/97 |
| Panama | 6/16/93 | |
| Papua New Guinea | 1/14/93 | 4/17/96 |
| Paraguay | 1/14/93 | 12/1/94 |
| Peru | 1/14/93 | 7/20/95 |
| Philippines | 1/13/93 | 12/11/96 |
| Poland | 1/13/93 | 2/23/95 |
| Portugal | 1/13/93 | 9/10/96 |
| Qatar | 2/1/93 | 9/3/97 |
| Romania | 1/13/93 | 2/15/95 |
| Russia | 1/13/93 | 11/5/97 |
| Rwanda | 5/17/93 | |
| Country | Date of Signature | Date of Ratification / Accession |
| St. Kitts & Nevis | 3/16/94 | |
| St. Lucia | 3/29/93 | 4/9/97 |
| St. Vincent & Grenadines | 9/20/93 | |
| Samoa | 1/14/93 | |
| San Marino | 1/13/93 | |
| Saudi Arabia | 1/20/93 | 8/9/96 |
| Senegal | 1/13/93 | |
| Seychelles | 1/15/93 | 4/7/93 |
| Sierra Leone | 1/15/93 | |
| Singapore | 1/14/93 | 5/21/97 |
| Slovak Republic | 1/14/93 | 10/27/95 |
| Slovenia | 1/14/93 | 6/11/97 |
| South Africa | 1/14/93 | 9/13/95 |
| Spain | 1/13/93 | 8/3/94 |
| Sri Lanka | 1/14/93 | 8/19/94 |
| Suriname | 4/28/97 | 4/28/97 |
| Swaziland | 9/23/93 | 11/20/96 |
| Sweden | 1/13/93 | 6/17/93 |
| Switzerland | 1/14/93 | 3/10/95 |
| Tajikistan | 1/14/93 | 1/11/95 |
| Tanzania | 2/25/94 | |
| Thailand | 1/14/93 | |
| Togo | 1/13/93 | 4/23/97 |
| Trinidad & Tobago | N/A | 6/24/97 |
| Tunisia | 1/13/93 | 4/15/97 |
| Turkey | 1/14/93 | 5/12/97 |
| Turkmenistan | 10/12/93 | 9/29/94 |
| Uganda | 1/14/93 | |
| Ukraine | 1/13/93 | |
| United Arab Emirates | 2/2/93 | |
| United Kingdom | 1/13/93 | 5/13/96 |
| United States | 1/13/93 | 4/25/97 |
| Uruguay | 1/15/93 | 10/6/94 |
| Uzbekistan | 11/24/95 | 7/23/96 |
| Venezuela | 1/14/93 | 12/3/97 |
| Vietnam | 1/13/93 | |
| Yemen | 2/8/93 | |
| Zaire | 1/14/93 | |
| Zambia | 1/13/93 | |
| Zimbabwe | 1/13/93 | 4/25/97 |