Grouping of nanomaterials to read-across hazard endpoints: from data collection to assessment of the grouping hypothesis by application of chemoinformatic techniques

Table 4 Squared loadings of PC1 and PC2 of the PCA of the source analogues

Property	(PC1 loadings)²	Property	(PC2 loadings)²
Biodurability 24 h Gambles solution (Al content)	0.90	Specific surface area (mean)	0.77
Impurity(Al)	0.89	Mean of total pore volume (ml/g)	0.74
Crystal type (Rutile)	0.89	Primary particle diameter (mean)	0.73
Crystal type (Anatase)	0.89	Crystallite size (mean)	0.67
Surface coating	0.87	Micropore volume (ml/g)	0.63
Impurity(Mg)	0.87	Impurity(Fe)	0.63

ISSN: 1743-8977