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Nano-TiO2– feasibility and challenges for human health risk assessment based on open literature
Abstract
This study aims at investigating feasibility and challenges associated with conducting a human health risk assessment for nano-titanium-dioxide (nano-TiO₂) based on the open literature by following an approach similar to a classical regulatory risk assessment. Gaps in the available data set, both in relation to exposures and hazard, do not allow reaching any definite conclusions that could be used for regulatory decision-making. Results show that repeated inhalation in the workplace and possibly consumer inhalation may cause risks. Also short-term inhalation following spray applications may cause risks. Main future work should focus on generating occupational and consumer inhalation exposure data, as well as toxicity data on absorption following inhalation, repeated dermal contact, and contact with damaged skin. Also relevant seems further information on possible neurotoxicity and genotoxicity/carcinogenicity, as well as establishing a No Observed Adverse Effect Level (NOAEL) for acute inhalation of nano-TiO₂.
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Christensen et al. derived a NOAEL of 0.5 mg/m3 for nano-TiO2.
“Christensen et al. [40] derived a NOAEL of 0.5 mg/m3 for nano-TiO2 (based on a multispecies 90-day inhalation study of Bermudez et al. [35]) which is quite close to CeO2.”
From Effects from a 90-day inhalation toxicity study with cerium oxide and barium sulfate nanoparticles in rats (2017) · cites this paper as [40]
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References 93 · Cited by 141
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Metadata
- Authors
- Christensen, F. M., Johnston, H. J., Stone, V., Aitken, R. J., Hankin, S., Peters, S., & Aschberger, K.
- Affiliations
- European Commission (BE)
- Edinburgh Napier University (GB)
- Institute of Occupational Medicine (GB)
- Corresponding author
- Christensen, Frans M.
- Venue
- Nanotoxicology
- Publisher
- Informa UK Limited
- Published
- 2010-08-23
- Volume
- 5
- Issue
- 2
- Pages
- 110-124
- ISSN
- 1743-5390 (ISSN-L)
- 1743-5404
- OpenAlex
- W2101660988
- Cited by
- 141
- References
- 93
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 2 · 2023: 4 · 2022: 4 · 2021: 7 · 2020: 2 · 2019: 8 · 2018: 5 · 2017: 12 · 2016: 15 · 2015: 11 · 2014: 21 · 2013: 15 · 2012: 19
- FWCI
- 7.39
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Nanotoxicology (publishedVersion)
- PubMed (publishedVersion)
- Joint Research Centre (European Commission) (submittedVersion)
- Funders
- Seventh Framework Programme
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Nanoparticles: synthesis and applications
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Air Quality and Health Impacts
- Keywords
- nano-titanium dioxide, human health risk assessment, inhalation exposure, occupational exposure, consumer exposure, spray application, dermal exposure, neurotoxicity, genotoxicity, carcinogenicity, no-observed-adverse-effect level, regulatory risk assessment, data gaps
- MeSH terms
- Animals, Humans, Risk Factors, Titanium, Occupational Exposure, Risk Assessment, No-Observed-Adverse-Effect Level, Inhalation Exposure, Nanoparticles
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