The International Cyanide Management Institute (ICMI) announced today that it has accepted the application of Hemlo Mining Corporation to become a mining signatory to the International Cyanide Management Code (Cyanide Code). The Cyanide Code is a voluntary industry program for companies involved in the production of gold and silver using cyanide and companies manufacturing and transporting this cyanide.

Hemlo Mining Corporation operates the Hemlo Mine in Canada, which it acquired from Barrick Mining Corporation in November  2025. The mine has achieved Cyanide Code certification four times, most recently in August 2021 while owned by Barrick Mining Corporation.

By becoming a signatory, Hemlo Mining Corporation commits to follow the Cyanide Code’s Principles and implement its Standards of Practice, and to have a certification audit of the Hemlo Mine conducted by independent third-party auditors. Operations will be certified if found in compliance with the Code, and may be de-certified if ICMI determines that they no longer comply with the Cyanide Code.

The Cyanide Code was developed under the aegis of the United Nations Environment Programme by a multi-stakeholder Steering Committee. The Cyanide Code is intended to complement an operation’s existing obligation to comply with the applicable laws and regulations of the political jurisdiction in which the operation is located.

ICMI has been established to administer the Cyanide Code, promote its adoption, evaluate its implementation, and manage the certification process. A detailed list of the operations covered by signatory companies’ applications, along with the full text of the Cyanide Code and its implementing and administrative documents, are available at www.cyanidecode.org.