Exclamation mark (GHS07)
The GHS pictogram for health hazards such as skin and eye irritation, skin sensitisation, and acute toxicity in category 4.
Easily confused with
How to read it
It is GHS07. Canada鈥檚 WHMIS lists it for acute toxicity in category 4, skin irritation, eye irritation, skin sensitizers and specific target organ toxicity from a single exposure in category 3. OSHA鈥檚 standard assigns it to skin sensitization among others, and permits it, without requiring it, for a Hazard Not Otherwise Classified, provided the words or the letters HNOC appear below it.
Also searched as: GHS07, harmful symbol, irritant symbol.
These identify the hazard class a pictogram represents. For handling, storage and first aid, refer to the product's label and safety data sheet.
Differences by country or standard
In Great Britain the exclamation mark covers health hazards and hazards to the ozone layer. On US workplace labels the ozone layer use is non-mandatory.
Look-alikes
More severe effects take other pictograms: the Skull and crossbones (GHS06) for acute toxicity in categories 1 to 3, the Corrosion (GHS05) pictogram for skin corrosion and serious eye damage, and the Health hazard (GHS08) pictogram for serious long-term hazards.
Read next
- Next in Hazard symbolsFlame (GHS02)The GHS pictogram for flammable hazards: flammable gases, aerosols, liquids and solids, and substances that ignite on their own, heat themselves or give off flammable gas in contact with water.
- The same shape in BPMN symbolsInclusive gatewayA point where the process takes one or more of several paths, depending on which conditions are true. The inclusive gateway is a diamond with a circle inside.
More hazard symbols
The same shape elsewhere
Browse symbols drawn with diamonds.
Sources
- Allocation of Label Elements (29 CFR 1910.1200, Appendix C), 29 CFR 1910.1200 Appendix C, U.S. Occupational Safety and Health Administration, C.2.3.3, C.4.7
- WHMIS - Pictograms (OSH Answers), Canadian Centre for Occupational Health and Safety
- Hazard pictograms (symbols), GB CLP, Health and Safety Executive (Great Britain)
- HCS Pictograms and Hazards (QuickCard), OSHA 3491-08R 2024, U.S. Occupational Safety and Health Administration
- GHS Classification (Rev.11, 2025) Summary, PubChem, U.S. National Library of Medicine
Researched, edited and approved by Rory Hansen before publishing. Last reviewed October 3, 2026. How we research
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