The establishment of the Globally
Harmonized System of Classification
and Labeling of Chemicals (GHS) is one of the global initiatives to
promote effective chemical hazard communication worldwide. Ultimately,
the GHS aims to enhance safe use of chemicals, as well as to facilitate
chemical trading across national borders. Countries that are now adopting
GHS into their respective national legislations include the EU, US,
Japan, Korea, Taiwan, and Malaysia. Nonetheless, challenges exist
that might impede GHS implementation worldwide. These challenges have
been identified and are discussed in this paper, namely, (i) adoption
of different versions of the GHS document, (ii) adoption of building
blocks, (iii) list of classified chemicals, (iv) different chemical
mixture classification throughout the supply chain, and (v) the definition
of GHS implementation. The challenges discussed in this paper are
not to discourage countries from implementing GHS but, rather, to
serve as input for the relevant entities to further strengthen GHS
implementation worldwide.