Home Announcements Mercury Control Ordinance (Cap. 640) Latest Announcements Health and Safety Alert - Event Safety Wastage charge of Liquid Nitrogen Link the Risk Assessment Reporting System with the Chemical Control System on 1 Jul 2022 Link the Risk Assessment Reporting System with the Chemical Control System on 1 Jul 2022 Pamphlet "Safe Custody of Chemicals in Laboratories" Mercury Control Ordinance (Cap. 640) 09 Nov 2021 The Mercury Control Ordinance (Cap. 640) will come into effect on 1 December 2021. The full text of the Ordinance can be downloaded from the following link. s12021252619 (gld.gov.hk)