Term Name:	photosensitizing agent
Synonyms:	photosensitising agent
Definition:	A chemical compound that can be excited by light of a specific wavelength and subsequently transfer energy to a chosen reactant. This is commonly molecular oxygen within a cancer tissue, which is converted to (highly rective) singlet state oxygen. This rapidly reacts with any nearby biomolecules, ultimately killing the cancer cells.
Ontology:	Chebi [CHEBI:47868]