What a PCN is
A Poison Centre Notification, usually shortened to PCN, is the submission of harmonised information on a hazardous mixture to the bodies appointed by Member States to support emergency health response. The legal basis is set out in Article 45 of Regulation (EC) No 1272/2008, the CLP Regulation, with the technical detail in Annex VIII.
The purpose is very important. When someone is exposed to a hazardous chemical mixture, whether a worker, a consumer or a child, the treating clinician needs to know within minutes what the product contains, in what proportions, and with what toxicological profile. PCN makes that information available to poison centres and the emergency services they advise, no matter where in the European Union the exposure occurred and no matter where the product was originally placed on the market.
The information required is comprehensive, and a complete notification covers:
- The full chemical composition of the mixture down to the concentration thresholds specified in Annex VIII
- The toxicological information available on the components
- The intended use category, distinguishing consumer, professional and industrial uses
- The packaging type, size and physical form of the product as placed on the market
- The product identifiers, including trade names, used in each Member State of supply
- The Unique Formula Identifier, or UFI, which links the product on the shelf to the dossier held by the appointed body
The dossier itself is prepared in the harmonised PCN format inside IUCLID Cloud or IUCLID 6, then exported as an i6z file and submitted through the ECHA Submission Portal to each Member State where the mixture is sold.
Who holds the obligation
The duty to notify falls on the European Union legal entity placing the mixture on the market, which covers importers and downstream users in the first instance. The November 2024 revision of CLP through Regulation (EU) 2024/2865 has widened that scope, and distributors who relabel, rebrand or further distribute hazardous mixtures across Member State borders are now duty holders in their own right, unless they can show that the same information has already been submitted upstream by the importer or downstream user.
A supplier based outside the European Union cannot discharge the obligation on behalf of the European duty holder. The duty holder may, however, appoint a competent third party to prepare and submit the dossier on their behalf, which is where consultancies such as LIRK NOR come in.
Where the system stands today
All Annex VIII transition periods have now closed:
- 1 January 2021 for hazardous mixtures intended for consumer and professional use
- 1 January 2024 for hazardous mixtures intended for industrial use
- 1 January 2025 as the final cut-off for legacy notifications previously made under national systems
Enforcement is now active across the Member States. The ECHA Enforcement Forum's pilot project, published in March 2026, found that around nineteen percent of hazardous mixtures sampled across the participating Member States had not been notified to poison centres at all. The REF-14 enforcement project, focused on consumer-facing hazardous mixtures including air fresheners and electronic cigarettes, was prepared during 2025 and inspections are running through 2026.
Non-compliance can result in product withdrawal and administrative penalties under each Member State's implementing legislation. The commercial damage of a withdrawal during a peak season often hurts more than the formal sanction itself.
A word on the United Kingdom
The UK splits into two distinct positions. Northern Ireland continues to operate under EU CLP through the Windsor Framework, so full Annex VIII notifications in i6z format are mandatory and go directly to the National Poisons Information Service in Birmingham as the appointed body, with UFI on label required.
Great Britain occupies a more ambiguous legal position. Annex VIII was inadvertently retained in GB CLP at the end of the transition period, which technically keeps the obligation alive, while NPIS actually operates the GB system as voluntary, accepting either a safety data sheet submission or a full Annex VIII dossier. The UK government has consulted on whether to formally revoke Annex VIII from GB law, and the position remains under review. Our guidance to clients is to treat GB as effectively voluntary today, while keeping a full Annex VIII dossier on standby for when the regulator asks or the legal position is clarified.
How LIRK NOR supports your PCN obligations
PCN is a continuous regulatory function that runs across product development, classification, labelling, safety data sheet authoring, commercial launch planning and downstream supply chain management. We support clients at a depth that matches the size of the in-house regulatory team and the complexity of the portfolio.
Strategic scoping and portfolio screening
Before any dossier is opened in IUCLID, the right first question is which mixtures actually require notification, under which use category, and in which Member States. We map portfolios systematically against the Article 45 scope and clarify the use category that drives deadlines, dossier content and label content.
Where notifications are already in place, gap analyses pick up dossiers prepared under earlier national systems that have not yet been brought into the harmonised format, dossiers that have fallen out of step with subsequent composition or classification changes, and cases where the UFI on the label no longer matches the formulation being supplied. The output is a prioritised compliance roadmap that distinguishes what needs immediate attention, what can be sequenced into the normal commercial cycle, and what carries latent risk that senior management should know about.
Dossier preparation and submission
Preparing a complete PCN dossier is a technical exercise of some depth. The quality of the underlying composition data, the consistency between the safety data sheet and the dossier, and the correct selection of product categories within the European Product Categorisation System all materially affect whether a submission is accepted, queried or quietly stored as deficient.
We prepare full IUCLID i6z dossiers for hazardous mixtures across the consumer, professional and industrial use categories, manage submissions through the ECHA Submission Portal to each Member State of supply, and handle the more demanding cases including mixtures-in-mixtures, group submissions, standard formulas and fuel notifications.
Where confidentiality of formulation is a commercial concern, particularly for non-European manufacturers supplying European importers, we advise on voluntary upstream notifications. These allow the European importer to make their own mandatory submission while referring to the upstream dossier, so the formulation does not need to be fully disclosed between commercial parties.
Unique Formula Identifier management
The UFI is the operational link between the physical product on the market and the regulatory record held by the appointed body, and it operates under a strict one-UFI-to-one-composition rule. Any meaningful change to the formulation triggers a new UFI, a new dossier and a coordinated update to the label and safety data sheet.
We help clients generate and register UFIs against the correct VAT identifier and formulation number, establish internal governance to prevent inconsistent UFIs spreading across business units, and audit labels and safety data sheets for correct UFI placement and legibility under the revised CLP labelling rules introduced by Regulation (EU) 2024/2865.
Maintenance and lifecycle management
A PCN dossier is a living regulatory record that needs to stay aligned with the product as it actually exists on the market. We provide ongoing maintenance services that monitor for the triggers requiring an update notification, including:
- Changes in composition, whether intentional reformulation or a substitution at the supplier level
- Changes in the classification of the mixture or of any of its hazardous components
- New or updated toxicological information that affects the regulatory profile
- Changes in product identifiers, including trade names and packaging variants
- Changes in the commercial use category, for example when an industrial product is extended to professional users
For clients who prefer a scheduled cycle, we run annual review programmes. Regulatory monitoring across CLP, Annex VIII, IUCLID format updates, ECHA guidance and Member State specific implementation runs in parallel, and the findings are translated into specific portfolio actions for the client.
Distributor obligations under Regulation (EU) 2024/2865
The 2024 CLP revision has brought a group of operators into the PCN regime who had reasonably assumed the obligation belonged elsewhere in the supply chain. Distributors who relabel, rebrand or further distribute hazardous mixtures across Member State borders are now duty holders, and many of these businesses do not have an established regulatory function.
We help distributors assess their obligations under the revised Article 45, decide case by case whether to submit independently or coordinate with upstream importers and downstream users, and design the internal processes and standard operating procedures needed to discharge the new duty without overburdening commercial teams.
Enforcement readiness and remediation
The ECHA Enforcement Forum's findings make the inspection landscape clear. We help clients prepare for inspection, run mock audits against the criteria most likely to be applied under projects like REF-14, and build defence files that document the due diligence applied to each notification.
Where historical non-compliance has surfaced, whether through internal review, due diligence in a commercial transaction or a query from a competent authority, we develop and execute remediation programmes that prioritise corrections by risk, manage retrospective notifications and protect ongoing market access during the remediation period.
Geographic extensions across Northern Ireland, Great Britain and Switzerland
For clients operating across the UK and the European Free Trade Area, we coordinate Northern Ireland notifications under EU CLP via NPIS Birmingham, manage Great Britain voluntary submissions with strategic advice on whether to submit a safety data sheet or a full Annex VIII dossier, and prepare Swiss notifications to Tox InfoSuisse, which runs its own system but accepts UFI codes and EU style PCN files through national adaptations. The aim is one coordinated submission strategy across these closely interconnected markets, so the same product is not being represented inconsistently to three different authorities.
Training and outsourced regulatory function
Not every company managing PCN obligations has a dedicated regulatory affairs team, and even those that do often hit periods of capacity constraint or specialist gaps. We deliver structured training for quality assurance, regulatory affairs and product stewardship teams on the substance of Annex VIII, the workings of IUCLID and the governance of UFIs across a portfolio.
For smaller manufacturers, importers and distributors that prefer a fractional regulatory function on retainer, we act as an outsourced PCN team, handling end-to-end notification management with clear contractual delineation that the legal obligation continues to rest with the EU duty holder.