Name Of Chemical Released In Salem Investigation

At least the chemical poisoning incident was not caused by Phosgene, a military toxic gas. This was reported in the Argus as being the probable agent, but a different, but superficially related material was finally positively identified:

McCook County Emergency Management thinks it has identified the mysterious substance found in the four-plex last Friday. Test results from the South Dakota and Minnesota State Labs point to aluminum phosphide, a toxic chemical often used by farmers. The report also lists traces of the gas version of the chemical, called phosphine, which can be used as a fumigant.

This still leaves question as to the origin of the chemicals in an apartment building:

Authorities say aluminum phosphide is not a chemical that would normally be found inside of a home. But they also won’t comment on if the chemical was put in the building to hurt those inside. “We’re attempting to get results back on many many things until we get all that back we can’t really say one way or the other,” Gerlach said.