To downplay the political impact of revelations that U.S. forces used deadly white phosphorus rounds against Iraqi insurgents in Falluja last year, Pentagon officials have insisted that phosphorus munitions are legal since they aren’t technically “chemical weapons.”
The media have helped them. For instance, the New York Times ran a piece today on the phosphorus controversy. On at least three occasions, the Times emphasizes that the phosphorus rounds are “incendiary muntions” that have been “incorrectly called chemical weapons.”
But the distinction is a minor one, and arguably political in nature. A formerly classified 1995 Pentagon intelligence document titled “Possible Use of Phosphorous Chemical” describes the use of white phosphorus by Saddam Hussein on Kurdish fighters:
IRAQ HAS POSSIBLY EMPLOYED PHOSPHOROUS CHEMICAL WEAPONS AGAINST THE KURDISH POPULATION IN AREAS ALONG THE IRAQI-TURKISH-IRANIAN BORDERS. <…>
IN LATE FEBRUARY 1991, FOLLOWING THE COALITION FORCES’ OVERWHELMING VICTORY OVER IRAQ, KURDISH REBELS STEPPED UP THEIR STRUGGLE AGAINST IRAQI FORCES IN NORTHERN IRAQ. DURING THE BRUTAL CRACKDOWN THAT FOLLOWED THE KURDISH UPRISING, IRAQI FORCES LOYAL TO PRESIDENT SADDAM ((HUSSEIN)) MAY HAVE POSSIBLY USED WHITE PHOSPHOROUS (WP) CHEMICAL WEAPONS AGAINST KURDISH REBELS AND THE POPULACE IN ERBIL (GEOCOORD:3412N/04401E) (VICINITY OF IRANIAN BORDER) AND DOHUK (GEOCOORD:3652N/04301E) (VICINITY OF IRAQI BORDER) PROVINCES, IRAQ.
In other words, the Pentagon does refer to white phosphorus rounds as chemical weapons — at least if they’re used by our enemies.
http://thinkprogress.org/2005/11/21/phosphorus-chemical/