Mexico published its national implementation of the UN GHS on October 9 of 2015, as NOM-018-STPS-2015, Harmonized system for the identification and communication of hazards and risks from hazardous chemicals in the workplace (NORMA Oficial Mexicana NOM-018-STPS-2015, Sistema armonizado para la identificación y comunicación de peligros y riesgos por sustancias químicas peligrosas en los centros de trabajo).

The standard regulates the use of chemical substances and mixtures in the workplace, and makes no obligations relative to the SDSs provided by suppliers. Nonetheless the NOM offers perspective on what elements will best serve Mexican customers who must comply with the standard in the workplace.

The NOM-018-STPS-2015 does not include any methods for the classification of mixtures. Instead, it references the NMX-R-019-SCFI-2011, harmonized system of classification and hazard communication of chemicals (Sistema armonizado de clasificación y comunicación de peligros de los productos químicos). Norma Mexicana (NMX) standards represent non-mandatory guidance.