Provenance

Reference data from EU CLP Annex VI and published regulations — verify against your supplier's SDS before use.

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Prevention · precautionary statement

P233 — Keep container tightly closed.

Prevention statements describe how to keep the harm from happening at all. 453 substances with a harmonised EU classification carry this code.

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

01 · Wording

What P233 says

Official

Keep container tightly closed.

Category

Prevention · GHS revision 9

Does your label need P233? That depends on the hazard classes of your product, on whether it goes to the public or to professionals, and on what else is already on the label — Annex IV column 5 lets one statement remove another. Work it out from a classification →

02 · Languages

P233 in the 24 official EU languages

A label put on the market in an EU country must carry the wording of that country's own language version of CLP — not a translation of the English one. These 24 lines are quoted from the consolidated regulation, Annex IV, and are the text to print.

LanguageOfficial wording of P233
BG български Bulgarian Съдът да се съхранява плътно затворен.
ES español Spanish Mantener el recipiente herméticamente cerrado.
CS čeština Czech Uchovávejte obal těsně uzavřený.
DA dansk Danish Hold beholderen tæt lukket.
DE Deutsch German Behälter dicht verschlossen halten.
ET eesti Estonian Hoida pakend tihedalt suletuna.
EL ελληνικά Greek Να διατηρείται ο περιέκτης ερμητικά κλειστός.
EN English English Keep container tightly closed.
FR français French Maintenir le récipient fermé de manière étanche.
GA Gaeilge Irish Coimeád an coimeádán dúnta go docht.
HR hrvatski Croatian Čuvati u dobro zatvorenom spremniku.
IT italiano Italian Tenere il recipiente ben chiuso.
LV latviešu Latvian Tvertni stingri noslēgt.
LT lietuvių Lithuanian Talpyklą laikyti sandariai uždarytą.
HU magyar Hungarian Az edény szorosan lezárva tartandó.
MT Malti Maltese Żomm il-kontenitur magħluq sew.
NL Nederlands Dutch In goed gesloten verpakking bewaren.
PL polski Polish Przechowywać pojemnik szczelnie zamknięty.
PT português Portuguese Manter o recipiente bem fechado.
RO română Romanian Păstrați recipientul închis etanș.
SK slovenčina Slovak Nádobu uchovávajte tesne uzavretú.
SL slovenščina Slovenian Hraniti v tesno zaprti posodi.
FI suomi Finnish Säilytä tiiviisti suljettuna.
SV svenska Swedish Behållaren ska vara väl tillsluten.

Source: CELEX:02008R1272-20260501, Annex IV. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic. Irish is one of the 24 official languages and its H and P texts are printed inside the multilingual Annex tables, but no consolidated CLP has ever been published in Irish — which is why an Irish-primary label cannot be built here.

Where P233 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.

JurisdictionBasisStatus of P233
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

04 · On a label

P233 usually appears combined

CLP Annex IV defines combined statements as single label elements. P233 is a component of one of them — this is how you will actually see it printed.

CodeCombined statement
P403+P233 Store in a well-ventilated place. Keep container tightly closed.

Substances carrying P233

Every entry whose harmonised CLP Annex VI classification includes this precautionary statement. Substances with a reference page here open on this site; the rest open on ghssymbols.com. Of these, 8 are group entries such as “beryllium compounds” or “salts of hydrazine” — Annex VI gives them no CAS number, so they are listed by Index No and have no page of their own.

453 of 453 shown

Nothing matches that filter.

All precautionary statements

The full list of P-codes with the jurisdiction switch lives on the precautionary statements hub. For the hazard side, see hazard statements (H-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.

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