▁reaction ▁may ▁fall ▁into ▁more ▁than ▁one ▁classification ▁above ▁depending ▁on ▁the ▁circumst ance . ▁ ▁For ▁example , ▁i od ate − ars en ous ▁acid ▁reaction ▁can ▁be ▁substr ate - de ple t ive ▁clock ▁reaction , ▁aut oc atal ysis - dri ven ▁clock ▁reaction ▁and ▁cra zy ▁clock ▁reaction . ▁ ▁Ex amples ▁ ▁One ▁class ▁of ▁example ▁is ▁the ▁i od ine ▁clock ▁re actions , ▁in ▁which ▁an ▁i od ine ▁species ▁is ▁mixed ▁with ▁re do x ▁re ag ents ▁in ▁the ▁presence ▁of ▁st arch . ▁After ▁a ▁delay , ▁a ▁dark ▁blue ▁color ▁suddenly ▁appears ▁due ▁to ▁the ▁formation ▁of ▁a ▁tri iod ide - st arch ▁complex . ▁▁▁ ▁Add itional ▁re ag ents ▁can ▁be ▁added ▁to ▁some ▁chemical ▁clock s ▁to ▁build ▁a ▁chemical ▁oscill ator . ▁For ▁example , ▁the ▁Brig gs – R aus cher ▁reaction ▁is ▁derived ▁from ▁an ▁i od ine ▁clock ▁reaction ▁by ▁adding ▁per ch lor ic ▁acid , ▁mal onic ▁acid ▁and ▁mang an ese ▁sul f ate . ▁ ▁See ▁also ▁ ▁Circ ad ian ▁clock ▁ ▁Chem ical ▁oscill ator ▁ ▁References ▁ ▁Category : Ch em ical ▁k inet ics ▁Category : C lock s ▁Category : Non - equ ilib rium ▁therm od ynam ics ▁Category : O sc ill ation ▁Category : Art icles ▁containing ▁video ▁cli ps ▁Category : Ch em ical ▁re actions <0x0A> </s> ▁The ▁disc ography ▁for ▁the ▁American ▁jazz ▁rock ▁band ▁Ste ely