GHS hazard statement
H420
Harms public health and the environment by destroying ozone in the upper atmosphere
GHS07 · Exclamation mark- Hazard group
- Environmental hazards
- Hazard class
- Hazardous to the ozone layer
- Signal word
- Warning
What H420 means
H420 is the GHS (Globally Harmonized System) hazard statement “Harms public health and the environment by destroying ozone in the upper atmosphere.” It belongs to the Hazardous to the ozone layer hazard class and appears in Section 2 of a Safety Data Sheet and on the product label when a substance or mixture meets the classification criteria for that class and category.
Where H420 applies, GHS assigns the signal word Warning and the GHS07 (Exclamation mark) pictogram. The exact signal word and pictogram set on a finished label come from the whole classification — the most severe endpoint drives the signal word, so a milder statement can be present without changing an already-Danger label.
Stop looking up codes by hand
GHSLogic reads the hazard and precautionary statements straight off your supplier SDSs, classifies the whole mixture across every GHS endpoint, and drafts a review-ready SDS and labels.
Reference information, not a compliance determination. Actual label elements depend on the full classification of your specific substance or mixture and require review by a qualified professional.