*3.2. Qualitative Assessment*

3.2.1. Control Banding Nanotool 2.0

As mentioned before, CB Nanotool 2.0 was one of the methods used to qualitatively assess the risk of exposure to incidental nanoparticles during the tasks understudy. Table 5 summarizes the considerations and results of the application of this qualitative method.


**Table 5.** Results of the application of CB Nanotool version 2.0.

<sup>1</sup> Considering the lowest OEL recommended in Portugal: Nickel inorganic compounds (Portuguese Institute of Quality, 2014). <sup>2</sup> Carc. 2, H351 according to the material safety data sheet. <sup>3</sup> Skin Sens. 1, H317 according to the material safety data sheet.
