Titanium dioxide (TiO₂),essential in cosmetics, paints, plastics, pharmaceuticals, and once in food, faced a decade-long debate over its safety. The European Union classified certain powdered forms as a possible carcinogen if inhaled. On 1 August 2025, the Court of justice of the European Union (CJEU) reversed this status after multiple legal and scientific challenges.This decision clarifies TiO₂ regulations and confirms that scientific rigor is required before substances are classified in the EU. Products with non-inhalable TiO₂ remain freely available.
Background
Used for its luminous white color and ability to block ultraviolet rays, titanium dioxide is valuable across various industries. Cosmetic brands rely on it as a pigment, sun protection ingredient, and formula mattifier. Its applications also cover paints, plastics, medicines, and previously, food colorings.
As a pigment, TiO₂ presents as a fine, white, opaque powder. It dose not dissolve in water and stays chemically stable. The high refractive index ensures it scatters light strongly, giving products a distinctive brightness.
Growing concerns about inhaling tiny or nano-scale titanium dioxide particles caused an increased focus from EU regulators. Ongoing research, reviews by experts, and legal battles followed concerns about cancer risks. These steps led, at one stage, to the classification of some powdered forms as carcinogenic by inhalation.
This article reviews how TiO₂ regulations shifted, from the early hazard classifications to the final annulment by Europe’s highest court.
Within cosmetics, titanium dioxide provides three primary functions:
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It acts as a pigment (CI 77891), listed in Annex IV of Regulation (EC) No. 1223/2009. This allows its use in foundations,powders,lipsticks,toothpastes,and more.
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As a UV shield, TiO₂ appears in Annex VI, making it an approved sunscreen and skin care filter. It blocks UVA/UVB rays. The nano-sized grade gives clear options, reducing visible whiteness in final products.
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The ingredient improves cosmetic texture and coverage, creating smoother skin tones and mattifying appearance.
Industrial uses for titanium dioxide stretch well beyond beauty and personal care:
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In paints and coatings, TiO₂ is the moast common white pigment, prized for its hiding power and durability in everything from buildings to vehicles.
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In plastic and paper manufacturing,it raises the gloss and lifespan of products.
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Medicine makers use it as an inert coating on pills and capsules for color and stability.
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Used as food colorant E171, titanium dioxide was removed from EU food use in 2022 after possible risks tied to very small particles.
With the popularity of micronized and nano forms, increased scrutiny centered on inhalation risk, especially in workplace settings. Regulatory bodies took a cautious stance, reflecting health-protective priorities.
This summary traces each phase of the legal and regulatory process,sharing insight into current legal status and TiO₂’s evolving reputation.
regulatory Developments and Key Legal Milestones
Regulation Timeline: Hazard Classification and Legal Disputes
On 1 August 2025, the EU’s highest court confirmed the withdrawal of titanium dioxide’s inhalation hazard label for particular powdered forms, ending years of uncertainty for manufacturers.
This resolution marked the end of long debates, technical reviews, and impact assessments, impacting every sector using TiO₂, including personal care, paint, and manufacturing.
Here is how the dispute unfolded over the years.
2016: France’s Proposal to Increase Regulation
In spring 2016, France’s national food and environmental safety agency (ANSES) offered a proposal to the European Chemicals Agency (ECHA) to label titanium dioxide as a category 1B carcinogen (inhalation hazard), citing studies under REACH Regulation (EC) No.1907/2006.
This decision rested on data from rat exposure experiments, in which continuous high doses of tio₂ caused chronic lung burden, inflammation, and tumors.
The mechanism, though, was mechanical accumulation, not a direct chemical carcinogenic effect-a point many researchers argued meant the outcome for humans was less relevant.
2017: ECHA’s RAC Endorses Hazard Label
One year later, the Risk Assessment Committee (RAC) at ECHA supported a more moderate classification-category 2 carcinogen-linking potential risk only to inhalation.
RAC stated the hazard came from particle features: size, form, and how long they linger in lung tissue, not from the material’s chemistry.
2020: TiO₂ Officially Labeled as Hazardous Under 14th ATP
By February 2020, the European Commission issued Regulation (EU) 2020/217, aligning CLP Regulation (EC) no. 1272/2008 with new scientific evidence.
The rule marked powdered TiO₂ with 1% or more particles of 10 μm or less as a category 2 hazard for inhalation, and required warnings on all product labels.
One such warning read:
EUH211: “Warning! In case of perilous dust formation, avoid inhaling the dust.”
This new label led to concern across paint, plastics, ink, paper, and cosmetic firms relying on TiO₂ as a key ingredient.
2021: Rules Shift for Cosmetics – Ban and Exemptions
Cosmetic products containing TiO₂ for color or sun protection were at the center of regulatory changes.
The ingredient was recognized in two spots under Regulation (EC) No. 1223/2009:
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Annex IV for use as a permitted pigment (CI 77891)
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Annex VI as a recognized UV blocker, with use restrictions for safety
After reclassification, Regulation (EU) 2021/850 updated the Cosmetics regulation Annex II to reflect new hazard findings.
Titanium dioxide forms deemed dangerous for inhalation were restricted,though exceptions were permitted for non-inhalable products.
The derogation meant creams, pastes, and similar formulations could still use the ingredient, provided they did not disperse airborne powder during use.
This patchwork approach led to confusion-TiO₂’s legality depended on its form and particle size in each specific product.
2022: General Court Strikes Down the Classification
Groups representing producers, importers, and users of TiO₂ brought cases (T-279/20 and others) before the General court of the EU, arguing against the hazard label’s scientific foundation and regulatory logic.
Their main claims:
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The scientific studies used to justify the hazard were flawed or misinterpreted.
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The mechanism seen in animal studies was irrelevant for human health risk.
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CLP rules do not support classification based merely on particle shape or size alone.
On 23 November 2022, the General Court set aside the hazard label, identifying a serious error by the Commission and the ECHA RAC’s assessment.
The Court focused on reliability issues in the key studies and found incomplete review of important scientific evidence.
2023-2025: Appeals and CJEU’s Definitive Ruling
France and the European Commission challenged the verdict at the CJEU under joint cases C-71/23 and C-82/23.
On 1 August 2025, the CJEU affirmed the General Court’s conclusions, sealing the annulment.
Key findings included:
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Not all available scientific evidence was considered in the risk assessment by RAC.
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Major methodological flaws existed in the evaluation of that evidence.
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Application of the precautionary principle is not valid without robust scientific support under CLP requirements.
Outcomes: Scientific Scrutiny and Public Health
This ruling sets a high bar for regulatory action and judicial review in the European Union.
Three main messages emerge:
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Hazard classification under CLP is limited when hazard is shaped by physical exposure,not inherent toxicity.
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Broader use of substances demands disciplined scientific analysis and review.
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Courts play an essential role in checking regulatory judgments across the EU.
For cosmetics, this case renews attention to where safety, regulatory clarity, and business needs intersect. There is now a greater focus on evidence-driven decision-making and transparent processes in risk assessment.
Titanium Dioxide in the EU: Main Points
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Titanium dioxide continues to be present in cosmetics, surface coatings, polymer goods, printing inks, paper, medicines, and formerly as a food colorant.
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France initiated the suspected carcinogen classification in 2016 based on animal trial results.
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From 2020, powder TiO₂ with small particles was reclassified in the EU as possibly causing cancer if inhaled, by the 14th ATP of the CLP rulebook.
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Cosmetic products were affected, with restricted use in powders but not in creams, gels, or pastes.
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Legal review led to the annulment of this classification-first by the General Court (2022),and afterward confirmed by CJEU (2025).
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After August 2025, these powdered forms of TiO₂ are no longer labeled as suspected inhalation carcinogens, but EU monitoring continues.
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This growth underscores the priority of exposure-based, evidence-first review in the EU’s chemical oversight.
Regulatory FAQ: TiO₂ in Europe
Is titanium dioxide still considered carcinogenic under EU law?
As of 1 August 2025, titanium dioxide is not classed as a suspected inhalation carcinogen for powder forms in the EU. this reverses its 2020 classification for powders below 10 µm particle size.
What caused the original carcinogen classification?
It was based on findings from animal studies, where high levels of dust exposure in rats produced lung issues and tumors.
Does the classification affect all versions of TiO₂?
No, it applied only to powder forms with particles 10 micrometres and smaller, and only for inhalation concerns.
Can cosmetic brands still use titanium dioxide?
Yes, it remains authorized as a pigment and UV blocker in the EU, with limitations on products that might create respirable dust.
Why did courts overturn the hazard label?
The courts concluded that scientific studies had not been fully evaluated and that errors were made in the risk assessment process.
what is the standing regulation for titanium dioxide in the EU?
as August 2025, TiO₂ is not regulated as a suspected cancer hazard by inhalation. Ongoing monitoring by regulators remains in place for all uses.
