TABLE 1.

List of two reference chemicals defined in the OECD performance standard Test No. 439 (in vitro Skin Irritation: Reconstructed Human Epidermis Test Method) to assess the predictive capacity of the skin models.

Test substances	Supplier	Physical state	UN GHS category
2-Propanol	Brenntag	Liquid, clear, colorless	No category (non-irritant)
Heptanal	Thermo Fisher Scientific	Liquid, clear, colorless	Category 2 (irritant)