Annex VIII to CLP explained: what the law actually requires

Almost every practical question about poison centre notifications — what to submit, when, for which mixtures, with what on the label — has its answer in one legal text: Annex VIII to the CLP Regulation (Regulation (EC) No 1272/2008). Most of what circulates about it online is paraphrase of paraphrase. This article works from the operative text instead, so you can check every claim against the annex itself.

One orientation point before the detail: the text called “Annex VIII” today is not the text adopted in 2017. The annex was replaced in full in 2020, and reading the original version — still the first result many searches return — will mislead you on composition ranges, group submissions and several definitions. Always work from the consolidated CLP text on EUR-Lex.

Where Annex VIII sits in the CLP Regulation

CLP — classification, labelling and packaging — is the EU’s implementation of the UN GHS system. Within it, Article 45 does two things: it obliges every member state to appoint a body responsible for receiving information relevant to emergency health response, and it obliges importers and downstream users to submit that information for mixtures classified as hazardous based on their health or physical effects.

Article 45 alone would have left 27 national interpretations of “relevant information” — which is exactly what existed before 2021, as a patchwork of national notification schemes. Annex VIII is the harmonisation layer: adopted under the empowerment in Article 45(4), it fixes the data set, the format, the calendar and the UFI mechanism that links a label to a submission. Two related anchors sit elsewhere in CLP: Article 25 governs supplemental label information (where the UFI lives on the label), and Article 47 requires member states to lay down penalties for infringements — which is why sanctions for a missing PCN vary by country.

The amendment chain, 2017–2020

Four Commission acts got the annex to its current shape. If you cite Annex VIII in a compliance file, this is the chain of custody:

Article 1 of 2020/1677 is one sentence: “Annex VIII to Regulation (EC) No 1272/2008 is replaced by the text in the Annex to this Regulation.” That is why citing 2017/542 for anything other than history is a mistake — and why you should be wary of any summary that does. (A related trap: a surprisingly common citation error attributes Annex VIII amendments to “Regulation 2022/1435”, which is in fact a pesticide-residue regulation with no connection to CLP.)

How the annex is structured

The annex is organised into four parts. Knowing which part answers which question saves hours:

• Part A — general requirements. Who must comply and from when (section 1 — the calendar now fully elapsed, see PCN deadlines); scope and definitions, including consumer, professional and industrial use and the limited-submission option for industrial-only mixtures (section 2); submission requirements — before placing on the market, in the official language(s) of the member state unless it provides otherwise, updates without undue delay (section 3); group submissions (section 4); creation and placement of the UFI (section 5); and ECHA’s mandate to maintain the formats and tools (section 6).
• Part B — information requirements. What the dossier contains: identification of mixture and submitter (section 1), hazards and label elements plus toxicological information (section 2), and the long composition section 3 — which components must be declared, exact concentrations versus permitted ranges, tighter precision for components of major concern, interchangeable component groups, standard formulas and fuels. Section 4 lists the update triggers, including Table 4’s concentration-variation bands that determine when a composition change forces a new submission.
• Part C — submission format. The element-by-element format of the submission ECHA must provide — effectively the legal skeleton of the PCN format that the portal and IUCLID implement.
• Part D — standard formulas.Fixed compositions (cements, gypsum and similar construction mixtures) that may be cited in place of full composition data under Part B’s standard-formula provisions.

One piece of Part B deserves quoting rather than summarising, because it is the rule most reformulations trip over. Table 4 of Part B section 4.1 sets the concentration variations that force a submission update when a component was declared with an exact concentration:

Alongside Table 4, the same section requires an update — before the changed mixture is placed on the market — when a declared component is added, replaced or deleted, when a concentration leaves its declared range, when the health or physical hazard classification changes, and when relevant new toxicological information becomes available. If your change-control process does not raise a flag for those events, Annex VIII compliance decays silently with every reformulation.

The concepts Annex VIII introduced

Six constructs from the annex now dominate day-to-day PCN work:

• UFI — Unique Formula Identifier (Part A section 5). The 16-character code that links the label to the notified composition; created by electronic means made available by ECHA and required on the label — or, for unpackaged and certain industrial supplies, in section 1.1 of the SDS.
• EuPCS — the harmonised product categorisation(Part A section 3.4). Every submission describes the intended use against ECHA’s categorisation system; choosing the category is its own discipline, covered in the EuPCS category guide.
• Mixture in mixture (MiM).Part B section 3 lets a formulator declare a purchased mixture as a component — identified by its supplier’s UFI or, failing that, SDS-based information — rather than reverse-engineering the supplier’s formulation. Details in mixture in mixture.
• Limited submission (Part A section 2.3). Industrial-only mixtures may submit reduced information if a contact point is available 24/7 to provide the rest during an incident.
• Group submission and standard formulas. One submission may cover several mixtures whose composition differs only in defined ways (for example perfumes, within limits), and standard-formula products can reference Part D compositions — both covered in group submissions and standard formulas.
• Components of major concern. For components whose toxicology drives the emergency response, Part B section 3.4 demands tighter concentration precision than for the rest of the formulation — the reason a PCN cannot simply reuse the concentration ranges from your SDS.

What Regulation (EU) 2024/2865 changes

The November 2024 revision of CLP — Regulation (EU) 2024/2865 — is the first structural change to the Article 45 regime since 2020. For poison centre duties, the headline is scope: distributors are brought into Article 45 for certain supply-chain situations. Under the current text, a mixture can move into another member state through a distributor without any actor holding a notification duty for that market; the revision closes that gap.

Timing matters and is often misstated: the regulation entered into force in 2024, but most of its provisions apply from 1 July 2026, while the poison-centre tranche — the Article 45 amendments that create the distributor duties, and the Annex VIII amendments — applies from 1 January 2027. Phrase it as “applies from”, not “in force since 2024” — the distinction decides whether a distributor is a duty holder on a given date.

Practically, two groups should be planning now. Distributors who move hazardous mixtures across member-state borders need to establish whether the markets they supply are covered by an upstream notification — and, where they are not, build the capability to submit. And formulators supplying those distributors should expect questions about market coverage of their existing notifications, because extending a PCN to another country is an update the original submitter can make far more cheaply than anyone downstream. The full analysis, including what it means for existing notifications, is in the 2024/2865 CLP revision explained.

Guidance v6.0 — the interpretive companion

The annex is dense, and several of its rules only make sense with worked examples: who is the duty holder in a toll-manufacturing chain, when a re-brander becomes a submitter, how the concentration bands interact with group submissions. ECHA’s Guidance on Annex VIII, version 6.0, published in 2025, is the document that fills that role — duty-holder scenarios, scope decisions, information-requirement walk-throughs.

A practical reading order

For a compliance manager meeting Annex VIII for the first time, reading front to back is the slow path. This order is faster:

1. Part A, section 2 — scope and definitions. Confirm your mixtures are in scope and classify each as consumer, professional or industrial use; this determines everything downstream.
2. Part A, sections 3–5 — submission requirements, group submission, UFI. This is the operational core: notify before placing on the market, language rules, label rules.
3. Part B, section 3 — composition requirements, read with your actual formulation data beside it. Decide component by component: exact concentration or range, MiM or full disclosure, any interchangeable component groups.
4. Part B, section 4 — update triggers. Build these into change control now; most late findings trace back to a reformulation nobody flagged to the regulatory owner.
5. Part C and Part D — only if you build or validate dossiers yourself; otherwise your software implements them.
6. Guidance v6.0 — targeted chapters as questions arise, not cover to cover.

Keep one distinction straight while reading: the annex fixes the information requirements, while the technical implementation — the PCN format ECHA maintains under Part A section 6, currently version 8, plus the 130+ validation rules the portal applies — is revised roughly annually without any change to the annex itself. Legal text and technical format move on separate clocks; the version history is tracked in PCN format versions.

The annex tells you what a compliant submission contains; it says nothing about how much work producing one should be. That part is a tooling choice — ECHA’s free portal with manual entry, or software that assembles and submits the dossier for you. Ufi Number does the latter for €20 per mixture, with the format kept current as ECHA revises it.