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

P201 — Obtain special instructions before use.

Prevention statements describe how to keep the harm from happening at all. 1,258 substances with a harmonised EU classification carry this code.

EU CLP: currentUS OSHA HazCom: currentUS HazCom 2012: currentUN GHS: withdrawn

01 · Wording

What P201 says

Official

Obtain special instructions before use.

Category

Prevention · GHS revision 9

Where P201 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 P201
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UN GHS Rev.11 (2025) UN GHS Rev.11, Annex 3 withdrawn Deleted without a direct replacement.

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

Substances carrying P201

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, 33 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.

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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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