Chemicals, through the different steps from manufacturing to end use are considered a real danger for environment and human at any age. Considering the global trade of chemicals, the importance of communication of the hazards at international level in a harmonized manner was recognized and as a result harmonized system of classification and labeling were introduced. The new system, which was called “Globally Harmonized System of Classification and Labeling of Chemicals (GHS)”, addresses classification of chemicals by types of hazard and proposes harmonized hazard communication elements, including labels and Safety Data Sheets (SDS).

The GHS also provides a basis for harmonization of rules and regulations on chemicals at national, regional and worldwide level. While governments, regional institutions and international organizations are the primary audiences for the GHS, it is important to recognize the GHS system is not considered a mandatory rule unless it is implemented by competent authorities (CA) and each CA may implement its criteria slightly different as guided by GHS. The different implementation of GHS causes dissimilarity in overall classification and labeling of the same product under different jurisdictions.