Titanium Dioxide in Commercial Sunscreens: the Morphological Characterization and the Quantification

Indah Primadona, Fitri Dara, Agustina Ircha Winda Pratiwi, - Indriyati, Fahmi Idzni, - Dedi, Muhamad Nasir

Abstract


Due to nanotechnology's advancement, the application of nanomaterials in commercial products, including in sunscreens, has been increased rapidly. Physical sunscreens employ Titanium dioxide (TiO2) or Zinc oxide (ZnO) nanoparticles as UV filter materials. Indonesian National Agency of Drug and Food Control regulates that TiO2 rutile polymorph, size distribution ≥30 nm, and maximum concentration of 25% are criteria for physical sunscreen marketed in Indonesia. However, most of these products do not indicate the detailed inorganic material information in the product ingredients, resulting in the increasing concern of nanoparticle’s risk to human health and the environment. Therefore, the size, type of crystal structure, and amount of TiO2 or ZnO must be closely monitored. In this work, we investigated the morphological structure of TiO2, including quantified its concentration in some commercial sunscreens marketed in Indonesia. TiO2 was characterized using different characterization techniques. XRD analysis revealed that some studied sunscreens employed anatase TiO2, which is not suggested to be added in a sunscreen product.  HRTEM analysis proved that the sizes of materials in sample S1-S3 are below 50 nm, and silica-coated TiO2 was observed in S4. Quantification of Titanium using GF-AAS yielded Ti's concentration in the range of 1400-7800 µg g-1 (0.14-0.79%). To the best of our knowledge, this is the first study to report the physical properties and the concentration of TiO2 nanoparticles (NPs) in commercial sunscreen marketed in Indonesia.


Keywords


Nanoparticle; nanotechnology; sunscreen; titanium dioxide; UV-blocking materials.

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References


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DOI: http://dx.doi.org/10.18517/ijaseit.11.4.12602

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