What does P406 mean?

What kind of precautionary statement is P406?

Storage statements (P4xx) set the conditions for keeping the product safely: locked up, in a cool, well-ventilated place or in the original container, protected from sunlight. Warehouse layout and container choice follow from these statements.

Which hazards is it used for?

In the CLP Annex IV assignment table, P406 is assigned to the classes of these hazard statements:

• H290May be corrosive to metals.

How many hazard statements is P406 assigned to?

In the CLP Annex IV assignment table, P406 is provided for the classes of 1 H statements in total: 1 physical hazard statement. The lowest-numbered example is H290 and the highest-numbered is H290. 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 P406 in the storage group:

• P403Store in a well-ventilated place.
• P404Store in a closed container.
• P405Store locked up.
• P407Maintain air gap between stacks or pallets.
• P410Protect from sunlight.
• P411Store at temperatures not exceeding … o C/… o F.

How is P406 read?

The text of P406 is 10 words long. It contains options separated by a slash; the preparer keeps the option that fits the product and deletes the others.

Where is P406 written in the SDS?

In the SDS, P406 is written in Section 2.2 (label elements) with its code and the text "Store in a corrosion-resistant/… container with a resistant inner liner.". Being a storage statement, it sits among the storage lines. The statement should also agree with the safe storage conditions in Section 7.2.

How does P406 appear on the label?

On the label P406 appears together with its text; under CLP Article 28(3) a label usually carries at most 6 precautionary statements. In the Chemoris selection method, storage statements are considered in position 3. 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 P406 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 storage candidate is selected.

Which classes and which priority is P406 assigned to?

In the CLP Annex IV assignment table, P406 appears in 1 class/category entries (1 different H statements). Priority split: secondary (priority 2) in 1 entries. Of these entries, 0 carry the signal word “Danger”, 1 carry “Warning” and 0 need no signal word. The pictograms that most often accompany it: GHS05 (1).

The class families it appears in most often: Met. Corr. (1).

Classes that P406 is assigned to

The first 1 rows of 1 entries in the CLP Annex IV assignment table (by priority and hazard order):

Statements assigned together with P406

The precautionary statements that most often appear with P406 in the same class entries (with entry count):

• P390Absorb spillage to prevent material damage. (1)
• P234Keep only in original packaging. (1)

Where does P406 stand in the storage group?

P406 is number 6 of the 19 statements in the P4xx group. The group holds 6 combined and 2 withdrawn statements and 12 single valid statements. Combined statements merge several situations on one line; withdrawn statements are replaced by their current equivalents.

Which SDS section does P406 feed?

Because of its number and its storage kind, P406 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 P406

• The text contains options separated by a slash; the preparer keeps only the option that fits the product.
• The text ends with “…”; the supplier supplies the completion.
• P406 should agree with Section 7; in Section 2.2 it is written with its code and text.
• The text is 10 words long; if the label space is narrow, choosing a combined statement can save room.

Official EU wording of P406 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 P406 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 P406 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