This is off topic, but it\clears up a point raised: US intelligence classified white phosphorus as 'chemical weapon'

The assessment was published in a declassified report on the American Department of Defence website. The file was headed: "Possible use of phosphorous chemical weapons by Iraq in Kurdish areas along the Iraqi-Turkish-Iranian borders."

In late February 1991, an intelligence source reported, during the Iraqi crackdown on the Kurdish uprising that followed the coalition victory against Iraq, "Iraqi forces loyal to President Saddam may have possibly used white phosphorous chemical weapons against Kurdish rebels and the populace in Erbil and Dohuk. The WP chemical was delivered by artillery rounds and helicopter gunships."