Brazil signed the Treaty of Tlatelolco on 9 May 1967, ratified the Treaty on 29 January 1968 and on 30 May 1994 presented its declaration of exemption to the requirements indicated in Article 29, paragraph 2, of the Treaty of Tlatelolco.
Brazil signed a Nuclear Safeguards Agreement with the International Atomic Energy Agency (IAEA) on 13 December 1991, in accordance with Article 13 of the Treaty of Tlatelolco.
With the signing of the Agreement for the Exclusively Peaceful Use of Nuclear Energy, the Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials (ABACC) was created on July 18, 1991, with the aim to guarantee that all existing nuclear materials and facilities in the two countries are being used exclusively for peaceful purposes.
Brazil acceded to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) on 18 September 1998 in London, Moscow and Washington.
Brazil signed the Comprehensive Nuclear-Test-Ban Treaty (CTBT) on 24 September 1996 and ratified it on 24 July 1998.
Brazil signed the Treaty on the Prohibition of Nuclear Weapons (TPNW), on 20 September 2017 but has not yet ratified.
External links:
Ministry of Foreign Affairs of Brazil
Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials (ABACC)