What a UFI is
UFI stands for unique formula identifier. Under EU poison centre rules, it links a hazardous mixture on the market to submitted formula information used for emergency health response. It appears on the label with the prefix UFI, followed by a structured alphanumeric code.
For makers, the important point is that a UFI belongs to a formula, not to a scent collection in general. If you change the formula enough, the old UFI may no longer describe the product correctly. Treat it as part of compliance data, not as a decorative code.
- It is tied to a submitted formula.
- It supports emergency health response.
- It is not the same as SKU, barcode or batch number.
When home-fragrance products may need one
For EU or EEA sale, a UFI is generally relevant for mixtures classified for health or physical hazards that are supplied to consumers or professional users. Scented candles, wax melts and reed diffusers can fall into that area when they have skin sensitisation, eye irritation, flammability, aspiration or other health or physical classifications.
Environmental-only classifications are treated differently, so do not assume every GHS09 label automatically creates a UFI duty. The correct sequence is to classify the finished product first, then check whether the classification triggers poison centre notification and UFI labelling for the market.
Candles versus diffusers
Candles and wax melts are solid or semi-solid wax mixtures, and many are classified mainly because of fragrance allergens or aquatic hazards. Diffusers and room sprays are liquid mixtures and may introduce solvent hazards, eye irritation, flammability or aspiration concerns. That means diffusers more often need deeper poison centre review.
Do not copy a UFI from a fragrance oil supplier onto your finished candle or diffuser unless the supplier explicitly covers your exact mixture and supply chain. The UFI should identify the mixture you place on the market. A neat fragrance oil and a finished candle are not the same formula.
Formula changes and multiple scents
Each scent can need its own formula assessment because each fragrance has a different composition. A lavender candle and a citrus candle made in the same wax base may need different CLP labels and different UFI handling. Changing fragrance percentage, supplier or base can also change the formula identity.
Batch-to-batch manufacturing variation is different from intentional formula change. A normal batch code tracks production. The UFI tracks the composition submitted for emergency response. Keep both systems, and make sure your records connect the label, formula and batch.
- One scent does not automatically share another scent's UFI.
- New fragrance supplier means a new review.
- Batch code and UFI serve different purposes.
GB, Northern Ireland and EU differences
Great Britain does not simply use the EU poison centre portal in the same way for GB-only supply. HSE points GB suppliers to National Poisons Information Service arrangements. Northern Ireland follows EU CLP for products placed on that market, so NI and EU sales need separate attention from a GB-only product.
If your store ships internationally, decide where each product is available before printing labels. A maker can avoid accidental non-compliance by limiting shipping destinations until UFI and notification work is finished for the relevant market.
Where the UFI goes on the label
When required, the UFI must be easy to find and connected to the hazardous product label information. On a small candle or diffuser, that may affect label layout. Do not hide it in decorative text or put it only on a removable price tag.
Plan UFI placement together with pictograms, signal word, H and P statements, supplier details and supplemental information. If the label becomes too crowded, use a larger back label, fold-out label or outer packaging that keeps the required information legible.
Frequently asked questions
Do candles need a UFI code?
For EU or EEA sale, they may need one if the finished candle is classified for health or physical hazards. Check the final classification first.
Do reed diffusers need a UFI?
Often they may, because liquid diffuser mixtures can have health or physical classifications. Confirm based on the finished formula.
Can I use my supplier's UFI?
Only if it correctly covers the exact mixture you place on the market and your supply situation. Usually your finished product needs its own review.
Is a UFI the same as a batch number?
No. A UFI identifies a formula for poison centre information. A batch number identifies a production batch.
Does Great Britain require the same UFI process as the EU?
GB has its own NPIS arrangements. Northern Ireland and EU sales follow EU CLP poison centre rules.