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Skocaj M, Filipic M, Petkovic J, et al. Titanium dioxide in our everyday life; is it safe?. Radiol Oncol. 2011;45(4):227-47doi: 10.2478/v10019-011-0037-0.
Skocaj, M., Filipic, M., Petkovic, J., & Novak, S. (2011). Titanium dioxide in our everyday life; is it safe?. Radiology and oncology, 45(4), 227-47. https://doi.org/10.2478/v10019-011-0037-0
Skocaj, Matej, et al. "Titanium dioxide in our everyday life; is it safe?." Radiology and oncology vol. 45,4 (2011): 227-47. doi: https://doi.org/10.2478/v10019-011-0037-0
Skocaj M, Filipic M, Petkovic J, Novak S. Titanium dioxide in our everyday life; is it safe?. Radiol Oncol. 2011 Dec;45(4):227-47. doi: 10.2478/v10019-011-0037-0. Epub 2011 Nov 16. PMID: 22933961; PMCID: PMC3423755.
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Radiol Oncol. 2011 Dec;45(4):227-47. doi: 10.2478/v10019-011-0037-0. Epub 2011 Nov 16.

Titanium dioxide in our everyday life; is it safe?.

Radiology and oncology

Matej Skocaj, Metka Filipic, Jana Petkovic, Sasa Novak

Affiliations

  1. Jožef Stefan Institute, Department for Nanostructured Materials, Ljubljana, Slovenia.

PMID: 22933961 PMCID: PMC3423755 DOI: 10.2478/v10019-011-0037-0

Abstract

BACKGROUND: Titanium dioxide (TiO(2)) is considered as an inert and safe material and has been used in many applications for decades. However, with the development of nanotechnologies TiO(2) nanoparticles, with numerous novel and useful properties, are increasingly manufactured and used. Therefore increased human and environmental exposure can be expected, which has put TiO(2) nanoparticles under toxicological scrutiny. Mechanistic toxicological studies show that TiO(2) nanoparticles predominantly cause adverse effects via induction of oxidative stress resulting in cell damage, genotoxicity, inflammation, immune response etc. The extent and type of damage strongly depends on physical and chemical characteristics of TiO(2) nanoparticles, which govern their bioavailability and reactivity. Based on the experimental evidence from animal inhalation studies TiO(2) nanoparticles are classified as "possible carcinogenic to humans" by the International Agency for Research on Cancer and as occupational carcinogen by the National Institute for Occupational Safety and Health. The studies on dermal exposure to TiO(2) nanoparticles, which is in humans substantial through the use of sunscreens, generally indicate negligible transdermal penetration; however data are needed on long-term exposure and potential adverse effects of photo-oxidation products. Although TiO(2) is permitted as an additive (E171) in food and pharmaceutical products we do not have reliable data on its absorption, distribution, excretion and toxicity on oral exposure. TiO(2) may also enter environment, and while it exerts low acute toxicity to aquatic organisms, upon long-term exposure it induces a range of sub-lethal effects.

CONCLUSIONS: Until relevant toxicological and human exposure data that would enable reliable risk assessment are obtained, TiO(2) nanoparticles should be used with great care.

Keywords: applications; nanoparticles; safety; titanium dioxide; toxicity

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