Where to start
A chemical pictogram is one part of hazard communication. Classification and the applicable framework determine the accompanying label information. This guide connects the international GHS model with selected national and regional sources, so you can distinguish a model framework, an implemented rule, explanatory guidance and a separate product-certification scheme.
Start with the jurisdiction
UNECE’s GHS is an international framework. The OSHA Hazard Communication standard and EU CLP regulation are separate implemented systems. Read the exact source for the market and use rather than assuming every GHS detail is adopted identically.
Keep workplace and transport labels separate
The nine GHS pictograms and dangerous-goods transport labels serve different contexts. The companion pictogram guide helps identify the artwork and source; it does not classify a substance or select the complete required label.
Use the complete communication record
Keep the classification basis, source version and approved statements with the artwork. A Safer Choice certification, pesticide resource or mixture identifier has its own scope and should not be treated as a replacement for hazard communication.
Useful starting points
Globally Harmonized System — Revision 11 (2025)
UNECE's 2025 revision of the GHS model for chemical hazard classification and communication.
United StatesHazard Communication — 29 CFR 1910.1200
US workplace chemical hazard communication, including classification, labels and safety data sheets.
European UnionClassification, Labelling and Packaging — CLP
ECHA's introduction to Regulation (EC) 1272/2008 and its chemical hazard communication framework.
United KingdomChemical hazard symbols and pictograms
HSE's visual reference to chemical hazard pictograms and their meanings.
United StatesEPA pesticide label resources
Official resources for pesticide label content and review.
Official chemicals resources
United StatesHazard Communication — 29 CFR 1910.1200
US workplace chemical hazard communication, including classification, labels and safety data sheets.
United StatesEPA pesticide label resources
Official resources for pesticide label content and review.
European UnionClassification, Labelling and Packaging — CLP
ECHA's introduction to Regulation (EC) 1272/2008 and its chemical hazard communication framework.
United KingdomChemical hazard symbols and pictograms
HSE's visual reference to chemical hazard pictograms and their meanings.
Globally Harmonized System — Revision 11 (2025)
UNECE's 2025 revision of the GHS model for chemical hazard classification and communication.