Editing Toxicity (section)

====Other methods of exposure and severity====
Skin corrosion and irritation are determined through a skin patch test analysis, similar to an [[Patch test|allergic inflammation patch test]]. This examines the severity of the damage done; when it is incurred and how long it remains; whether it is reversible and how many test subjects were affected.

'''Skin corrosion''' from a substance must penetrate through the epidermis into the dermis within four hours of application and must not reverse the damage within 14 days. '''Skin irritation''' shows damage less severe than corrosion if: the damage occurs within 72 hours of application; or for three consecutive days after application within a 14-day period; or causes [[inflammation]] which lasts for 14 days in two test subjects. '''Mild skin irritation''' is minor damage (less severe than irritation) within 72 hours of application or for three consecutive days after application.

Serious '''[[Human eye|eye]] damage''' involves tissue damage or degradation of vision which does not fully reverse in 21 days. Eye irritation involves changes to the eye which do fully reverse within 21 days.