Laboratory safety assessment of candles and wax melts for toxicological risk assessment and UK and EU product compliance.

September 5, 2026 Syed Muhammad Shamuel Shees

Toxicological Risk Assessment for Candles and Wax Melts: What UK and EU Makers Need

The short answer

Candles and wax melts are not cosmetics, so they do not need a CPSR. To sell them legally in the UK or EU you need a Toxicological Risk Assessment (TRA) proving the product is safe under general product safety law, CLP hazard classification and labelling where the fragrance makes the product hazardous, and candle safety labels. Most scented products also need a Safety Data Sheet.

Key takeaways

Candles and wax melts fall under general product safety and chemical labelling law, not cosmetics law, so a CPSR is the wrong document.
A Toxicological Risk Assessment is your evidence that the product is safe as sold and burned, and it drives what your label must say.
Most scented candles and almost all wax melts are hazardous mixtures under CLP because of their fragrance load, which triggers pictograms, hazard statements and precautionary statements on the label.
Candle safety labels, a Safety Data Sheet and, in the EU, a poison centre notification with a UFI code are commonly required alongside the TRA.
Everything starts with your fragrance supplier's IFRA certificate, allergen statement and Safety Data Sheet.

Candle and wax melt making has grown into one of the most popular small businesses in the UK and Europe, and one of the most misunderstood when it comes to compliance. Makers are routinely told they need a CPSR, which is wrong, or that they need nothing at all, which is worse. The truth sits in the middle. A candle is a consumer product, and every consumer product placed on the market must be safe: in Great Britain under the General Product Safety Regulations 2005 and in the EU under the General Product Safety Regulation. A scented candle is also a chemical mixture, so the CLP Regulation on classification, labelling and packaging applies to it, with enforcement by Trading Standards and the Office for Product Safety and Standards.

The document that ties those duties together is the Toxicological Risk Assessment. This guide explains what a TRA for a candle or wax melt actually assesses, why fragrance load matters so much, what CLP labelling you will probably need, how candle safety labels fit in, what to collect from your suppliers, and the mistakes that get products pulled from marketplaces.

Why candles are not cosmetics

The Cosmetics Regulation covers products applied to the human body to clean, perfume, protect or condition it. A candle is burned in a room and a wax melt is warmed in a burner; neither is applied to the body, so neither is a cosmetic, however skin safe the fragrance or however much shea butter is in the wax. That means no CPSR, no Product Information File and no SCPN or CPNP notification. It does not mean no rules. It means a different set of rules, centred on general product safety and chemical hazard labelling, and the TRA is how you demonstrate you have met them.

The one exception. A massage candle, whose melted pool is poured onto the skin, is a cosmetic and needs a CPSR, because the wax is intended to be applied to the body. Everything else in this article is about ordinary candles and melts that are burned or warmed for fragrance.

What a candle or wax melt TRA assesses

A Toxicological Risk Assessment for a home fragrance product identifies every substance in the finished product, gathers the hazard data for each, and models how people are realistically exposed to it. For a candle that exposure is unusual: nobody eats or rubs in a candle, but everyone in the room breathes what it gives off. So the assessment looks at the fragrance materials evaporating from the melt pool and released through combustion, the room size and ventilation a typical user has, how long a candle burns in a session, and how often. For a wax melt the exposure is evaporation from a warmer, with the added consideration that melts are handled in the hand before use, so skin contact with concentrated fragrance is foreseeable.

Substance identification. Wax type and grade, every fragrance or essential oil constituent from the supplier documentation, dyes, additives such as vybar or stearin, and the wick and any metal core.
Hazard profile. Skin sensitisation and irritation of fragrance allergens, aquatic toxicity, aspiration hazards for certain carriers, flammability, and any substances of concern in the fragrance.
Exposure scenarios. Inhalation during burning or warming, skin contact when handling melts or trimming wicks, accidental ingestion by a child, and contact with the melt pool.
Conclusion and controls. Whether the product is safe as intended, the maximum fragrance load the assessor is comfortable with, the CLP classification of the finished mixture, and the warnings and instructions that must appear on the label and packaging.

Phoenix prepares these as a Toxicological Risk Assessment for fragranced products, and the same report supports the CLP label and, where needed, the Safety Data Sheet.

Fragrance load: the number that decides everything

The single most important variable in a candle or melt TRA is the percentage of fragrance in the finished product. Fragrance oils are complex mixtures, and many of their components are classified as skin sensitisers, aquatic toxins or both. A candle at six percent fragrance and a wax melt at ten percent contain those classified substances at very different concentrations, and CLP classification works on concentration thresholds. Below a threshold the finished product may carry no hazard statement; above it the product itself becomes classified and must be labelled as hazardous. This is why wax melts, which routinely run at eight to twelve percent fragrance, are classified far more often than candles, and why a fragrance that is fine in a candle can push a melt into needing pictograms.

Do not exceed the IFRA limit for the category. Your fragrance supplier's IFRA certificate gives a maximum percentage for candles and a separate one for wax melts and air fresheners. Those are hard ceilings for skin sensitisation and other endpoints, and a TRA cannot approve a product that breaches them.

CLP: will your candle need a hazard label?

If the TRA and the classification calculation show the finished mixture meets CLP hazard criteria, the product must carry a CLP label. For scented candles and melts the most common outcomes are a skin sensitisation statement (may cause an allergic skin reaction), aquatic hazard statements, and occasionally eye irritation, each with its pictogram, signal word and the precautionary statements that go with them. The label must also carry the product identifier, the names of the substances driving the classification, your business name, address and telephone number, and the nominal quantity. For a wax melt in a small clamshell this is a real design challenge, which is why it needs to be planned before the packaging is ordered.

Where the label goes. On the immediate packaging or the container. For a container candle, a label on the base or side of the vessel; for a melt, on the clamshell or box.
Minimum sizes. CLP sets minimum label and pictogram dimensions by package size; tiny fold over labels that shrink the pictogram below the minimum are a common enforcement finding.
Unclassified products. If the finished product is not classified, no hazard label is required, but the TRA should record why, and you still need candle safety labelling and a supplier of record on the pack.

The HSE guidance on chemical classification is the authoritative starting point for GB, and the classification is derived from the same supplier data the TRA uses, so it makes sense to have both done together.

Candle safety labels

Separate from CLP, candles carry the familiar safety pictograms and text: never leave a burning candle unattended, keep away from things that catch fire, keep out of reach of children and pets, trim the wick, burn on a heat resistant surface, and so on. These come from the European candle safety standard on product safety labels, and while a standard is not itself law, following it is the accepted way to show your candle meets the general product safety duty, and retailers and marketplaces expect it. Wax melts have their own sensible equivalents: use in a suitable burner, do not add water, do not touch hot wax, keep away from children and pets. The TRA will typically recommend the exact set of statements for your product.

Safety Data Sheets and poison centre notification

A Safety Data Sheet is required for any hazardous mixture supplied to another business, and most trade customers, fulfilment houses and marketplaces will ask for one whether or not you technically supply consumers only. If your candle or melt is classified, have an SDS prepared alongside the TRA; the two are built from the same data. In the EU, a mixture classified for health or physical hazards also falls within poison centre notification, which means submitting the formulation to the ECHA portal and printing a UFI code on the label before sale. Great Britain does not operate the EU system, so a UK only seller is not required to submit to ECHA, but a maker selling into the EU must plan for it.

Documents to collect before you order an assessment

Fragrance oil documents. The Safety Data Sheet, the IFRA conformity certificate showing the category limits, and the allergen declaration for every fragrance you use.
Essential oils. SDS and, ideally, a batch specific allergen or constituent breakdown, since natural oils vary.
Wax and additives. SDS or technical data sheet for the wax, any dye, and any additive.
The formulation. Fragrance percentage by weight for each product, and the finished product weight.
Packaging and use. Vessel type, wick type, burn instructions, intended burner type for melts, and a photo of the product.

If your fragrance supplier cannot provide an IFRA certificate and allergen statement, that is a red flag in itself, and our allergen compliance review can help you establish what is actually in the oil before you commit to it.

A worked example: why the same fragrance behaves differently in a candle and a melt

Suppose a fragrance oil contains a constituent classified as a skin sensitiser, present at ten percent of the oil. In a candle loaded at six percent fragrance, that constituent is at 0.6 percent of the finished product. In a wax melt loaded at ten percent, it is at one percent. If the CLP threshold for that sensitiser is one percent, the candle is not classified for that hazard and the melt is, so the melt needs the pictogram, the signal word and the hazard statement while the candle does not. Now add aquatic toxicity, where thresholds can be lower, and the candle may be classified on that ground alone. This is the calculation the TRA and the classification perform for every constituent, and it is why guessing is not an option and why a change of fragrance supplier, even for the same scent name, means reassessing.

Essential oil candles and natural claims

Candles scented with essential oils are not exempt from any of this. Essential oils are complex natural mixtures rich in classified constituents such as limonene, linalool and citral, and a lavender or citrus candle is often classified more readily than one made with a synthetic fragrance. Natural does not mean unclassified. The TRA needs a constituent breakdown for each essential oil, ideally batch specific because natural oils vary, and the label may need to name the allergens. Keep marketing claims factual as well: a candle can be described as scented with essential oils, but claims that it purifies the air, relieves stress or treats anything move into territory the assessment does not support.

What marketplaces and retailers will ask for

Amazon, Etsy, Not On The High Street and most independent retailers now ask candle and wax melt sellers for evidence of compliance before or shortly after listing. The typical request is the TRA or safety assessment, the CLP classification and label artwork, a Safety Data Sheet for classified products, and confirmation of who the responsible business is. Having these ready as one consistent package avoids the scramble of a listing suspension, and it is exactly what a Trading Standards officer would ask for in a market inspection. Keep the documents together, dated, and updated whenever a fragrance or supplier changes.

Common mistakes that get candles delisted

Selling with a CPSR. A CPSR does not assess combustion or inhalation and does not produce a CLP classification. Marketplaces and Trading Standards know the difference.
No assessment at all. Under general product safety law the burden is on you to show the product is safe. Without a TRA you have nothing to show.
Ignoring the wax melt IFRA category. Using the candle limit for a melt, which is often lower, is a frequent error.
Shrinking the CLP label. Pictograms below the minimum size, missing supplier details or missing hazard statements are the most common label failures.
Changing fragrance without reassessing. Every new fragrance, and every change of supplier for the same fragrance, changes the classification and needs the TRA updated.
Guessing the classification. The classification is a calculation from constituent concentrations against CLP thresholds, not an opinion.

How long it takes and what it costs

A candle or wax melt TRA is usually faster and less expensive than a cosmetic CPSR because there is no PIF, notification or Responsible Person chain around it, and assessors can often cover a whole fragrance range in one engagement. The pacing item is almost always supplier paperwork. If your IFRA certificates and SDS are complete, an assessment with CLP classification and label wording can typically be turned around in days rather than weeks. Ask for the TRA, the CLP classification and the SDS as one package so the documents agree with each other.

If you are not sure whether a product in your range is a candle, a cosmetic or something else, our regulatory consultation settles that first, so you never pay for the wrong report.

Phoenix services mentioned in this article

Official sources and legislation

About the author

Phoenix Safety Consultants is a cosmetic compliance consultancy with offices in London, Estonia and Pensacola, Florida. Our safety assessors and toxicologists prepare Cosmetic Product Safety Reports, Toxicological Risk Assessments, Product Information Files, Safety Data Sheets and UK and EU notifications for brands of every size. Talk to the team on WhatsApp at +44 7346 009332 or at compliance@phoenixsco.com.

Disclaimer: This article is general information, not legal advice. Regulations change and product decisions depend on your exact formulation, claims and market. Have your product assessed by a qualified professional before sale.

Frequently Asked Questions

Do candles need a CPSR in the UK?

No. Candles are not cosmetics, so a CPSR does not apply. They need a Toxicological Risk Assessment to show they are safe under general product safety law, CLP hazard labelling if classified, and candle safety labels.

Do wax melts need a safety assessment?

Yes. Wax melts are consumer products and chemical mixtures. A TRA demonstrates they are safe, and because melts carry a high fragrance load they are very often classified under CLP and need a hazard label.

What is CLP and does it apply to my candle?

CLP is the Regulation on classification, labelling and packaging of chemical mixtures. A scented candle or wax melt is a mixture, so if its fragrance content makes it meet hazard criteria it must carry a CLP label with pictograms, hazard and precautionary statements and your supplier details.

Do I need a Safety Data Sheet for candles?

If the finished product is classified as hazardous and you supply it to another business, yes. In practice most marketplaces and trade customers ask for one regardless, so it is sensible to have an SDS prepared with the TRA.

What is a UFI code and do I need one?

A UFI is a unique formula identifier printed on the label of hazardous mixtures notified to EU poison centres. It applies to products sold in the EU that are classified for health or physical hazards. Great Britain does not require the EU notification, but EU sales do.

Can I use the same fragrance percentage in candles and wax melts?

Not automatically. The IFRA certificate gives separate maximum levels for candles and for wax melts or air fresheners, and the melt limit is often lower. The TRA also assesses each product's exposure separately.

Do I need a new TRA for every fragrance?

Every distinct fragrance changes the substances present and therefore the classification, so each needs to be assessed. Many assessors will cover a range of fragrances in one engagement, which keeps the cost down.

Filed in: Candle Compliance, candle compliance uk, candle safety assessment uk, candle safety labels, Candles, CLP, clp for candles, clp wax melts, do candles need a cpsr, Home Fragrance, IFRA, Product Safety, Safety Labels, TRA, tra for wax melts, UK EU Regulation, wax melt safety assessment, Wax Melts