Poison Centre Notification: format and validation rule updates
ECHA updated the XML-based PCN format to Version 8 (27 April 2026, released with IUCLID 6 version 10), the format used to structure Poison Centre Notifications for hazardous mixtures under CLP Article 45 and Annex VIII. This is a format and validation update, not a new legal obligation by itself — but a 2026 ECHA enforcement pilot found 19% of inspected mixtures had no PCN submitted and 15% of labels were missing the UFI, so companies should treat format and UFI/composition consistency as an active compliance risk, not routine housekeeping.
Published16 Sept 2026
EffectiveHarmonised Annex VIII format mandatory EU-wide since 1 January 2025; PCN format Version 8 in effect since 27 April 2026
Compliance deadlineFormat and validation updates apply on an ongoing basis — align internal PCN generation and validation against format Version 8 before your next dossier submission.
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