Health hazard · Acute toxicity - dermal

H312 — Harmful in contact with skin

Health hazard statements describe what the substance does to a person exposed to it. 263 substances with a harmonised EU classification carry this code.

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

01 · Wording

What H312 says

Official

Harmful in contact with skin.

Source

CLP Annex III · Health hazards

Classification

Acute toxicity - dermal GHS chapter 3.1

Category 4 · pictogram GHS07 (exclamation mark) · signal word Warning

UN GHS history

Unchanged since 2009.

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

wording never changed

Present in every UN GHS edition from Rev.3 (2009) to Rev.11 (2025), with the same wording throughout.

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 H312 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 H312
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	Current
UN GHS	Rev.11 (2025) UN GHS Rev.11, Annex 3	Current

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

03 · On a label

H312 also appears combined

CLP Annex III defines combined hazard statements as single label elements. H312 is a component of 3 of them — this is how you will actually see it printed. The combinations have no pages of their own: a plus sign in a URL has to be encoded and breaks in other people's links and in analytics.

Code	Combined statement
H302+H312	Harmful if swallowed or in contact with skin. CLP verbatim: Harmful if swallowed or in contact with skin
H312+H332	Harmful in contact with skin or if inhaled. CLP verbatim: Harmful in contact with skin or if inhaled
H302+H312+H332	Harmful if swallowed, in contact with skin or if inhaled. CLP verbatim: Harmful if swallowed, in contact with skin or if inhaled

04 · Substances

Substances carrying H312

Every entry whose harmonised CLP Annex VI classification includes this hazard statement. Substances with a reference page here open on this site; the rest open on ghssymbols.com. Of these, 18 are group entries such as “salts of picric acid” or “beryllium compounds” — Annex VI gives them no CAS number, so they are listed by Index No and have no page of their own.

263 of 263 shown

Nothing matches that filter.

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.