Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous or Other Gases, and of Bacteriological Methods of Warfare

Party

Andorra added

• Ratification: 28-04-2026 (A)
• Entry into force: 28-04-2026
• Reservations / Declarations: No
• Objections: No

Party

Honduras added

• Ratification: 18-06-2025 (A)
• Entry into force: 31-07-2025
• Reservations / Declarations: No
• Objections: No

General information

• Entry into force: 10-05-1926

Kingdom part

Netherlands (in Europe)

• Entry into force: 31-10-1930

Netherlands (Bonaire)

• Entry into force: 10-10-2010

Netherlands (Sint Eustatius)

• Entry into force: 10-10-2010

Netherlands (Saba)

• Entry into force: 10-10-2010

Aruba

• Entry into force: 01-01-1986

Curaçao

• Entry into force: 10-10-2010

Sint Maarten

• Entry into force: 10-10-2010

Party

Afghanistan

• Ratification: 09-12-1986 (A)
• Entry into force: 09-12-1986

Albania

• Ratification: 20-12-1989 (A)
• Entry into force: 20-12-1989

Algeria

• Ratification: 27-01-1992 (A)
• Entry into force: 27-01-1992

Angola

• Ratification: 08-11-1990 (A)
• Entry into force: 08-11-1990

Antigua and Barbuda

• Ratification: 27-04-1988 (Su)
• Entry into force: 01-11-1981

Argentina

• Ratification: 12-05-1969 (A)
• Entry into force: 12-05-1969

Australia

• Ratification: 24-05-1930 (A)
• Entry into force: 24-05-1930

Austria

• Signature: 17-06-1925
• Ratification: 09-05-1928 (R)
• Entry into force: 09-05-1928

Bahrain

• Ratification: 09-12-1988 (A)
• Entry into force: 09-12-1988

Bangladesh

• Ratification: 20-05-1989 (A)
• Entry into force: 20-05-1989

Barbados

• Ratification: 16-07-1976 (Su)
• Entry into force: 30-11-1966

Belgium

• Signature: 17-06-1925
• Ratification: 04-12-1928 (R)
• Entry into force: 04-12-1928

Benin

• Ratification: 09-12-1986 (A)
• Entry into force: 09-12-1986

Bhutan

• Ratification: 19-02-1979 (A)
• Entry into force: 19-02-1979

Bolivia

• Ratification: 13-08-1985 (A)
• Entry into force: 13-08-1985

Brazil

• Signature: 17-06-1925
• Ratification: 28-08-1970 (R)
• Entry into force: 28-08-1970

Bulgaria

• Signature: 17-06-1925
• Ratification: 07-03-1934 (R)
• Entry into force: 07-03-1934

Burkina Faso

• Ratification: 03-03-1971 (A)
• Entry into force: 03-03-1971

Cabo Verde

• Ratification: 15-10-1991 (A)
• Entry into force: 15-10-1991

Cambodia

• Ratification: 15-03-1983 (A)
• Entry into force: 15-03-1983

Cameroon

• Ratification: 20-07-1989 (A)
• Entry into force: 20-07-1989

Canada

• Signature: 17-06-1925
• Ratification: 06-05-1930 (R)
• Entry into force: 06-05-1930

Central African Republic

• Ratification: 31-07-1970 (A)
• Entry into force: 31-07-1970

Chile

• Ratification: 02-07-1935 (R)
• Entry into force: 02-07-1935

China

• Signature: 17-06-1925
• Ratification: 24-08-1929 (A)
• Entry into force: 24-08-1929

Colombia

• Ratification: 24-11-2015 (A)
• Entry into force: 24-11-2015

Costa Rica

• Ratification: 17-06-2009 (A)
• Entry into force: 17-06-2009

Côte d'Ivoire

• Ratification: 27-07-1970 (A)
• Entry into force: 27-07-1970

Croatia

• Ratification: 18-12-2006 (A)
• Entry into force: 18-12-2006

Cuba

• Ratification: 24-06-1966 (A)
• Entry into force: 24-06-1966

Cyprus

• Ratification: 12-12-1966 (Su)
• Entry into force: 16-08-1960

Czech Republic

• Signature: 17-06-1925
• Ratification: 16-08-1938 (R)
• Entry into force: 16-08-1938

Democratic People's Republic of Korea

• Ratification: 04-01-1989 (A)
• Entry into force: 04-01-1989

Denmark

• Signature: 17-06-1925
• Ratification: 05-05-1930 (R)
• Entry into force: 05-05-1930

Dominican Republic

• Ratification: 08-12-1970 (A)
• Entry into force: 08-12-1970

Ecuador

• Ratification: 16-09-1970 (A)
• Entry into force: 16-09-1970

Egypt

• Signature: 17-06-1925
• Ratification: 06-12-1928 (R)
• Entry into force: 06-12-1928

El Salvador

• Signature: 17-06-1925
• Ratification: 12-01-2010 (R)
• Entry into force: 12-01-2010

Equatorial Guinea

• Ratification: 20-05-1989 (A)
• Entry into force: 20-05-1989

Estonia

• Signature: 17-06-1925
• Ratification: 28-08-1931 (R)
• Entry into force: 28-08-1931

Eswatini

• Ratification: 23-07-1991 (A)
• Entry into force: 23-07-1991

Ethiopia

• Signature: 17-06-1925
• Ratification: 07-10-1935 (A)
• Entry into force: 07-10-1935

Fiji

• Ratification: 21-03-1973 (Su)
• Entry into force: 10-10-1970

Finland

• Signature: 17-06-1925
• Ratification: 26-06-1929 (R)
• Entry into force: 26-06-1929

France

• Signature: 17-06-1925
• Ratification: 10-05-1926 (R)
• Entry into force: 10-05-1926

Gambia, The

• Ratification: 05-11-1966 (Su)
• Entry into force: 18-02-1965

Germany

• Signature: 17-06-1925
• Ratification: 25-04-1929 (R)
• Entry into force: 25-04-1929

Ghana

• Ratification: 03-05-1967 (A)
• Entry into force: 03-05-1967

Greece

• Signature: 17-06-1925
• Ratification: 30-05-1931 (R)
• Entry into force: 30-05-1931

Grenada

• Ratification: 03-01-1989 (Su)
• Entry into force: 07-02-1974

Guatemala

• Ratification: 03-05-1983 (A)
• Entry into force: 03-05-1983

Guinea

• Ratification: 11-12-1980 (Su)
• Entry into force: 02-09-1980

Guinea-Bissau

• Ratification: 20-05-1989 (A)
• Entry into force: 20-05-1989

Holy See

• Ratification: 18-10-1966 (A)
• Entry into force: 18-10-1966

Hungary

• Ratification: 11-10-1952 (A)
• Entry into force: 11-10-1952

Iceland

• Ratification: 02-11-1967 (A)
• Entry into force: 02-11-1967

India

• Signature: 17-06-1925
• Ratification: 09-04-1930 (R)
• Entry into force: 09-04-1930

Indonesia

• Ratification: 21-01-1971 (Su)
• Entry into force: 27-12-1949

Iran

• Ratification: 05-11-1929 (A)
• Entry into force: 05-11-1929

Iraq

• Ratification: 08-09-1931 (A)
• Entry into force: 08-09-1931

Ireland

• Ratification: 29-08-1930 (A)
• Entry into force: 29-08-1930

Israel

• Ratification: 20-02-1969 (A)
• Entry into force: 20-02-1969

Italy

• Signature: 17-06-1925
• Ratification: 03-04-1928 (R)
• Entry into force: 03-04-1928

Jamaica

• Ratification: 28-07-1970 (Su)
• Entry into force: 06-08-1962

Japan

• Signature: 17-06-1925
• Ratification: 21-05-1970 (R)
• Entry into force: 21-05-1970

Jordan

• Ratification: 20-01-1977 (A)
• Entry into force: 20-01-1977

Kazakhstan

• Ratification: 20-04-2020 (A)
• Entry into force: 20-04-2020

Kenya

• Ratification: 06-07-1970 (A)
• Entry into force: 06-07-1970

Kuwait

• Ratification: 15-12-1971 (A)
• Entry into force: 15-12-1971

Kyrgyzstan

• Ratification: 29-06-2020 (A)
• Entry into force: 29-06-2020

Laos

• Ratification: 20-05-1989 (A)
• Entry into force: 20-05-1989

Latvia

• Signature: 17-06-1925
• Ratification: 03-06-1931 (R)
• Entry into force: 03-06-1931

Lebanon

• Ratification: 17-04-1969 (A)
• Entry into force: 17-04-1969

Lesotho

• Ratification: 10-03-1972 (Su)
• Entry into force: 04-10-1966

Liberia

• Ratification: 17-06-1927 (A)
• Entry into force: 17-06-1927

Libya

• Ratification: 29-12-1971 (A)
• Entry into force: 29-12-1971

Liechtenstein

• Ratification: 06-09-1991 (A)
• Entry into force: 06-09-1991

Lithuania

• Signature: 17-06-1925
• Ratification: 15-06-1933 (R)
• Entry into force: 15-06-1933

Luxembourg

• Signature: 17-06-1925
• Ratification: 01-09-1936 (R)
• Entry into force: 01-09-1936

Madagascar

• Ratification: 02-08-1967 (A)
• Entry into force: 02-08-1967

Malawi

• Ratification: 14-09-1970 (A)
• Entry into force: 14-09-1970

Malaysia

• Ratification: 10-12-1970 (A)
• Entry into force: 10-12-1970

Maldives

• Ratification: 27-12-1966 (A)
• Entry into force: 27-12-1966

Malta

• Ratification: 21-09-1964 (Su)
• Entry into force: 21-09-1964

Mauritius

• Ratification: 12-03-1968 (Su)
• Entry into force: 12-03-1968

Mexico

• Ratification: 28-05-1932 (A)
• Entry into force: 28-05-1932

Moldova

• Ratification: 31-01-2011 (A)
• Entry into force: 31-01-2011

Monaco

• Ratification: 06-01-1967 (A)
• Entry into force: 06-01-1967

Mongolia

• Ratification: 06-12-1968 (A)
• Entry into force: 06-12-1968

Morocco

• Ratification: 13-10-1970 (A)
• Entry into force: 13-10-1970

Nepal

• Ratification: 09-05-1969 (A)
• Entry into force: 09-05-1969

Netherlands, the Kingdom of the

• Signature: 17-06-1925
• Ratification: 31-10-1930 (R)
• Entry into force: 31-10-1930

New Zealand

• Ratification: 24-05-1930 (A)
• Entry into force: 24-05-1930

Nicaragua

• Signature: 17-06-1925
• Ratification: 05-10-1990 (R)
• Entry into force: 05-10-1990

Niger

• Ratification: 05-04-1967 (Su)
• Entry into force: 03-08-1960

Nigeria

• Ratification: 15-10-1968 (A)
• Entry into force: 15-10-1968

North Macedonia

• Ratification: 20-08-2015 (A)
• Entry into force: 20-08-2015

Norway

• Signature: 17-06-1925
• Ratification: 27-07-1932 (R)
• Entry into force: 27-07-1932

Pakistan

• Ratification: 15-04-1960 (Su)
• Entry into force: 15-08-1947

Palestine

• Ratification: 19-01-2018 (A)
• Entry into force: 19-01-2018

Panama

• Ratification: 04-12-1970 (A)
• Entry into force: 04-12-1970

Papua New Guinea

• Ratification: 11-12-1980 (Su)
• Entry into force: 16-09-1975

Paraguay

• Ratification: 22-10-1933 (A)
• Entry into force: 22-10-1933

Peru

• Ratification: 13-08-1985 (A)
• Entry into force: 13-08-1985

Philippines

• Ratification: 08-06-1973 (A)
• Entry into force: 08-06-1973

Poland

• Signature: 17-06-1925
• Ratification: 04-02-1929 (R)
• Entry into force: 04-02-1929

Portugal

• Signature: 17-06-1925
• Ratification: 01-07-1930 (R)
• Entry into force: 01-07-1930

Qatar

• Ratification: 18-10-1976 (A)
• Entry into force: 18-10-1976

Republic of Korea, the

• Ratification: 04-01-1989 (A)
• Entry into force: 04-01-1989

Romania

• Signature: 17-06-1925
• Ratification: 23-08-1929 (R)
• Entry into force: 23-08-1929

Russian Federation

• Ratification: 05-04-1928 (A)
• Entry into force: 05-04-1928

Rwanda

• Ratification: 11-05-1964 (Su)
• Entry into force: 01-07-1962

Saint Kitts and Nevis

• Ratification: 27-04-1989 (Su)
• Entry into force: 19-09-1983

Saint Lucia

• Ratification: 21-12-1988 (Su)
• Entry into force: 22-02-1979

Saint Vincent and the Grenadines

• Ratification: 08-05-1999 (Su)
• Entry into force: 09-04-1930

Saudi Arabia

• Ratification: 27-01-1971 (A)
• Entry into force: 27-01-1971

Senegal

• Ratification: 15-06-1977 (A)
• Entry into force: 15-06-1977

Sierra Leone

• Ratification: 20-03-1967 (A)
• Entry into force: 20-03-1967

Slovakia

• Signature: 17-06-1925
• Ratification: 16-08-1938 (R)
• Entry into force: 16-08-1938

Slovenia

• Ratification: 08-04-2008 (A)
• Entry into force: 08-04-2008

Solomon Islands

• Ratification: 01-06-1981 (Su)
• Entry into force: 01-06-1981

South Africa

• Ratification: 24-05-1930 (A)
• Entry into force: 24-05-1930

Spain

• Signature: 17-06-1925
• Ratification: 22-08-1929 (R)
• Entry into force: 22-08-1929

Sri Lanka

• Ratification: 20-01-1954 (A)
• Entry into force: 20-01-1954

Sudan

• Ratification: 17-12-1980 (A)
• Entry into force: 17-12-1980

Sweden

• Signature: 17-06-1925
• Ratification: 25-04-1930 (R)
• Entry into force: 25-04-1930

Switzerland

• Signature: 17-06-1925
• Ratification: 12-07-1932 (R)
• Entry into force: 12-07-1932

Syria

• Ratification: 17-12-1968 (A)
• Entry into force: 17-12-1968

Tajikistan

• Ratification: 15-11-2019 (A)
• Entry into force: 15-11-2019

Tanzania

• Ratification: 22-04-1963 (A)
• Entry into force: 22-04-1963

Thailand

• Signature: 17-06-1925
• Ratification: 06-06-1931 (R)
• Entry into force: 06-06-1931

Togo

• Ratification: 05-04-1971 (A)
• Entry into force: 05-04-1971

Tonga

• Ratification: 19-07-1971 (Su)
• Entry into force: 04-06-1970

Trinidad and Tobago

• Ratification: 31-08-1962 (Su)
• Entry into force: 24-11-1970

Tunisia

• Ratification: 12-07-1967 (A)
• Entry into force: 12-07-1967

Türkiye

• Signature: 17-06-1925
• Ratification: 05-10-1929 (R)
• Entry into force: 05-10-1929

Uganda

• Ratification: 24-05-1965 (A)
• Entry into force: 24-05-1965

Ukraine

• Ratification: 15-07-2003 (Su)
• Entry into force: 15-07-2003

United Kingdom

• Signature: 17-06-1925
• Ratification: 09-04-1930 (R)
• Entry into force: 09-04-1930

United States of America

• Signature: 10-04-1975
• Ratification: 10-04-1975 (R)
• Entry into force: 10-04-1975

Uruguay

• Signature: 17-06-1925
• Ratification: 12-04-1977 (R)
• Entry into force: 12-04-1977

Uzbekistan

• Ratification: 13-04-2021 (A)
• Entry into force: 13-04-2021

Venezuela

• Signature: 17-06-1925
• Ratification: 08-02-1928 (R)
• Entry into force: 08-02-1928

Vietnam

• Ratification: 15-12-1980 (A)
• Entry into force: 15-12-1980

Yemen

• Ratification: 17-03-1971 (A)
• Entry into force: 17-03-1971

Yugoslavia (< 25-06-1991)

• Signature: 17-06-1925
• Ratification: 12-04-1929 (R)
• Entry into force: 12-04-1929