Assertion: iodide's iodine | /r/HasProperty | discovered by courtois
Facets:
value: in 1811
type: TEMPORAL
Source sentences:
text: The discovery and commercial availability of the halides: iodine, bromine and chlorine a few years earlier (iodine was discovered by Courtois in 1811, bromine by Löwig in 1825 and Balard in 1826 independently, and chlorine by Scheele in 1774) meant that silver photographic processes that rely on the reduction of silver iodide, silver bromide and silver chloride to metallic silver became feasible.