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Radioactive material or ionising radiation symbol: yellow triangle with a black border and the black radiation trefoil: three blades around a central dot
ISO 7010-W003

Sign type set by Directive 92/58/EEC (Annex II) and the UK Health and Safety (Safety Signs and Signals) Regulations 1996 (Schedule 1); pictogram drawn to ISO 7010, which both allow.

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Warning signsSafety and compliance marksSafety signs (ISO 7010)

Radioactive material or ionising radiation

Yellow triangle with a black border and the black radiation trefoil: three blades around a central dot. · also called “W003”, “ionising radiation”, “radiation warning”, “radioactive material”, “trefoil”

What the Radioactive material or ionising radiation symbol means

Radiation hazard

Radioactive material or ionising radiation is present here. Do not enter or handle anything unless you are authorised, and follow the protection rules for the area.

Source · Standard ISO 7010 Graphical symbols — Safety colours and safety signs — Registered safety signs · checked

Where it appears

Warning signs
  • ISO 7010
    —This meaning

Questions about the Radioactive material or ionising radiation symbol

What does the Radioactive material or ionising radiation symbol mean?
Radioactive material or ionising radiation is present here. Do not enter or handle anything unless you are authorised, and follow the protection rules for the area.
What does the Radioactive material or ionising radiation symbol look like?
Yellow triangle with a black border and the black radiation trefoil: three blades around a central dot. It is also called “W003”, “ionising radiation”, “radiation warning”, “radioactive material” and “trefoil”.
Which standard defines the Radioactive material or ionising radiation symbol?
It is listed as ISO 7010-W003.

Checked against the source · · How we verify

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