Physical hazard · Aerosols

H229 — Pressurised container: May burst if heated

Physical hazard statements describe what the substance itself can do — explode, ignite, react, corrode metal. No substance with a harmonised EU classification carries this code.

EU CLP: currentUS OSHA HazCom: currentUS HazCom 2012: absentUN GHS: current

01 · Wording

What H229 says

Official

Pressurised container: May burst if heated.

Source

CLP Annex III · Physical hazards

Classification

Aerosols GHS chapter 2.3

Category 3 · signal word Warning

UN GHS history

Introduced in Rev.4 (2011).

Rev.3 2009

Rev.4 2011

Rev.5 2013

Rev.6 2015

Rev.7 2017

Rev.8 2019

Rev.9 2021

Rev.10 2023

Rev.11 2025

added in Rev.4 (2011)

Added by UN GHS Rev.4 and unchanged through Rev.11 (2025). Jurisdictions that sit on an earlier revision do not have this code at all.

Nine editions of the UN model text, 86 hazard statements, 19 of which ever moved. Read the full story in what changed in UN GHS Rev.11.

02 · Legal status

Where H229 is current

GHS is a United Nations model text, revised every two years, and each jurisdiction adopts a revision on its own timetable. A code can be legally current in one system and deleted in another — that is normal, not an error.

Jurisdiction	Basis	Status of H229
EU CLP	Regulation (EC) 1272/2008 CLP Annex IV, Part 2 (consolidated)	Current
US OSHA HazCom	29 CFR 1910.1200 Appendix C UN GHS Rev.7 (final rule of 20 May 2024)	Current
US HazCom 2012	legacy · GHS Rev.3 UN GHS Rev.3, Annex 3	not in this system
UN GHS	Rev.11 (2025) UN GHS Rev.11, Annex 3	Current

Currently in force under: EU CLP, US OSHA HazCom, UN GHS. Sources: EU CLP · US OSHA HazCom · US HazCom 2012 · UN GHS

03 · Substances

Substances carrying H229

No substance with a harmonised classification in CLP Annex VI carries this code. That does not mean it is unused — suppliers apply it to their own mixtures.

All hazard statements

The full list of H-codes with the jurisdiction switch lives on the hazard statements hub. For what to do about the hazard, see precautionary statements (P-codes).

Wording quoted from the regulation named above. Substance counts come from harmonised classifications in CLP Annex VI — the statements on a real product also depend on the supplier's own classification. Always check the supplier safety data sheet.