cathartic corrosive http://sis.nlm.nih.gov/enviro/iupacglossary/glossaryc.html http://sis.nlm.nih.gov/enviro/iupacglossary/glossaryc.html concentration http://sis.nlm.nih.gov/enviro/iupacglossary/glossaryc.html http://sis.nlm.nih.gov/enviro/iupacglossary/glossaryc.html Chemical conversion cacosmia irrational fear of chemicals http://sis.nlm.nih.gov/enviro/iupacglossary/glossaryc.html containment catabolism