The Globally Harmonized System of Classification and Labelling of Chemicals (GHS) is implemented in Thailand by the Notification of Ministry of Industry (MOI) Subject: Hazard Classification and Communication System of Hazardous Substances B.E. 2555 (2012). The notification adopted UN GHS 3rd revision and took effect from Mar 13th 2012. The implementation over chemical substances was given a year’s grace period and became mandatory on Mar 13th 2013. While the implementation on mixtures was given a 5-year grace period and the GHS requirements will extend to mixtures soon on Mar 13th 2017.