What does P233 mean?

What kind of precautionary statement is P233?

Prevention statements (P2xx) describe the measures that stop exposure or an accident before it happens: staying away from heat and ignition sources, wearing personal protective equipment, not breathing vapour or dust, washing hands after work. They are the rules a user applies before starting to work with the product.

Which hazards is it used for?

In the CLP Annex IV assignment table, P233 is assigned to the classes of these hazard statements:

• H224Extremely flammable liquid and vapour.
• H225Highly flammable liquid and vapour.
• H226Flammable liquid and vapour.

Combined statements containing this code

• P403+P233

How many hazard statements is P233 assigned to?

In the CLP Annex IV assignment table, P233 is provided for the classes of 3 H statements in total: 3 physical hazard statements. The lowest-numbered example is H224 and the highest-numbered is H226. Whether a mixture label carries this statement depends on those classes really applying to the mixture.

Neighbouring statements of the same kind

The statements closest in number to P233 in the prevention group:

• P230Keep wetted with…
• P231Handle and store contents under inert gas/…
• P232Protect from moisture.
• P234Keep only in original packaging.
• P235Keep cool.
• P240Ground and bond container and receiving equipment.

How is P233 read?

This statement is a 4-word text. The text is a single instruction without options and is written as it appears in Annex IV.

Where is P233 written in the SDS?

If P233 is on the list of precautionary statements in Section 2.2, it is printed with its code and the text "Keep container tightly closed.". The statement should also agree with the safe handling precautions in Section 7.

How does P233 appear on the label?

P233 shows up on a label only if it is selected: the candidates from Annex IV are reduced to at most 6 under Article 28(3). In the Chemoris selection method, prevention statements are considered in position 2. If the core statements exceed 6, Article 28(3) allows up to 8; when a combined statement is chosen, its individual parts are not repeated on the label. As P233 is on the list of precautionary statements of Annex IV, it can be used in current labels and SDSs; Chemoris writes it into the document only when the relevant prevention candidate is selected.

Which classes and which priority is P233 assigned to?

In the CLP Annex IV assignment table, P233 appears in 3 class/category entries (1 different H statements). Priority split: secondary (priority 2) in 3 entries. Of these entries, 2 carry the signal word “Danger”, 1 carry “Warning” and 0 need no signal word. The pictograms that most often accompany it: GHS02 (3).

The class families it appears in most often: Flam. Liq. (3).

Classes that P233 is assigned to

The first 3 rows of 3 entries in the CLP Annex IV assignment table (by priority and hazard order):

Statements assigned together with P233

The precautionary statements that most often appear with P233 in the same class entries (with entry count):

• P303+P361+P353IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower]. (3)
• P370+P378In case of fire: Use… to extinguish. (3)
• P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. (3)
• P240Ground and bond container and receiving equipment. (3)
• P241Use explosion-proof [electrical/ventilating/lighting/…] equipment. (3)

Where does P233 stand in the prevention group?

P233 is number 12 of the 38 statements in the P2xx group. The group holds 2 combined and 4 withdrawn statements and 33 single valid statements. Combined statements merge several situations on one line; withdrawn statements are replaced by their current equivalents.

Which SDS section does P233 feed?

Because of its number and its prevention kind, P233 relates to Section 7 Handling and storage of the SDS; in Section 2.2 it is written with its code and text. Statements in the same number range feed the same section.

Checklist when writing P233

• P233 is a part of the combined statements P403+P233; when a combined statement is selected, P233 is not repeated on the label.
• P233 should agree with Section 7; in Section 2.2 it is written with its code and text.
• The text is 4 words long; if the label space is narrow, choosing a combined statement can save room.

Official EU wording of P233 in other languages

When a product is exported to the EU, the SDS and label are expected in the official language of the Member State where it is placed on the market (REACH Article 31(5)). The table gives the official wording of P233 from the CLP Annex III/IV language versions published in the Official Journal of the European Union. Source: EUR-Lex CELEX 02008R1272-20260701.

Next steps

To read a statement like P233 correctly on a label and in an SDS, see the guide How to read H and P codes; to pick the class and prepare the label automatically, use the free label tool.

Where does it appear in the safety data sheet?

Precautionary statements are given with their code and full text in Section 2.2 (label elements) of the safety data sheet. Alternatives separated by a slash or in square brackets (e.g. gloves/protective clothing) are narrowed down to suit the product.

Frequently asked questions