Editing Zyklon B (section)

==Legacy==
[[File:Majdanek Komora Gazowa.JPG|thumb|Interior of Majdanek gas chamber, showing [[Prussian blue]] residue ]]
After World War II ended in 1945, [[Bruno Tesch]] and [[Karl Weinbacher]] of Tesch & Stabenow were tried in a British military court and executed for knowingly providing Zyklon B to the SS for use on humans.{{sfn|Shirer|1960|p=972}} Gerhard Peters, who served as principal operating officer of Degesch and Heli and also held posts in the Nazi government, served two years and eight months in prison as an accessory before being released due to amendments to the penal code.{{sfn|Hayes|2004|pp=297–298}}

Use of hydrogen cyanide as a pesticide or cleaner has been banned or restricted in some countries.{{sfn|United Nations|2002|pp=545, 171, 438}} Most hydrogen cyanide is used in industrial processes, made by companies in Germany, Japan, the Netherlands and the US.{{sfn|Dzombak et al.|2005|p=42}}{{sfn|United Nations|2002|p=545}} Degesch resumed production of Zyklon B after the war. The product was sold as Cyanosil in Germany and Zyklon in other countries. It was still produced as of 2008.{{sfn|BFR|2008}} Degussa sold Degesch to Detia-Freyberg GmbH in 1986. The company is now called Detia-Degesch.{{sfn|Hayes|2004|p=300}} Degussa and one of its subsidiaries controversially supplied materials for Berlin's [[Memorial to the Murdered Jews of Europe]], which was completed in 2004.{{sfn|Leggewie|Meyer|2005|p=204}}{{sfn|Fleishman|2003}}  Up until around 2015, a fumigation product similar to Zyklon B was in production by Lučební závody Draslovka of the [[Czech Republic]], under the trade name Uragan D2. ''Uragan'' means "hurricane" or "cyclone" in Czech.{{sfn|Lučební závody Draslovka}} 

Subsequent use of the word "Zyklon" in trade names has prompted angry reactions in English-speaking countries. The name "Zyklon" on portable roller coasters made since 1965 by [[Pinfari]] provoked protests among Jewish groups in the U.S. in 1993{{sfn|''New York Times''|1993}} and 1999.{{sfn|Katz|1999}} In 2002, British sportswear and football equipment supplier [[Umbro]] issued an apology and stopped using the name "Zyklon", which had appeared since 1999 on the box for one of its [[athletic shoe|trainers]], after receiving complaints from the [[Simon Wiesenthal Center]] and the [[Beth Shalom Holocaust Centre]].{{sfn|BBC News|August 2002}} Also in 2002, [[Siemens]] withdrew its application for an American trademark of the word "Zyklon", which their subsidiary [[BSH Bosch und Siemens Hausgeräte]] had proposed to use for a new line of home appliances in the United States. (The firm was already using the name in Germany for one of their vacuum cleaners.) Protests were lodged by the Simon Wiesenthal Center after the trademark application was reported to [[BBC News Online]] by one of their readers.{{sfn|BBC News|September 2002}} French company IPC's product names used "Cyclone" for [[degreaser]]s and suffix "B" for [[Biodegradation|biodegradable]]: "Cyclone B" was renamed {{lang|fr|"Cyclone Cap Vert"}} ("green cap") in 2013 after protests from Jewish groups.{{sfn|Piérot|2013}}{{sfn|Ouest-France|2013}} A rabbi said the name was "horrible ignorance at best, and a [[Guinness World Record|Guinness record]] in evil and cynicism if the company did know the history of the name of its product."{{sfn|The Jewish Press|2013}}

[[Holocaust denial|Holocaust deniers]] claim that Zyklon B gas was not used in the gas chambers, relying for evidence on the discredited research of [[Fred A. Leuchter]], who found low levels of [[Prussian blue]] in samples of the gas chamber walls and ceilings. Leuchter attributed its presence to general delousing of the buildings. Leuchter's [[scientific control#Negative|negative control]], a sample of gasket material taken from a different camp building, had no cyanide residue.{{sfn|Harmon|Stein|1994}} In 1999, James Roth, the chemist who had analyzed Leuchter's samples, stated that the test was flawed because the material that was sent for testing included large chunks, and the chemical would only be within 10 microns of the surface. The surface that had been exposed to the chemical was not identified, and the large size of the specimens meant that any chemical present was diluted by an undeterminable amount.{{sfn|''Mr. Death'': Transcript|1999}} In 1994, the Institute for Forensic Research in [[Kraków]] re-examined Leuchter's claim, stating that formation of Prussian blue by exposure of bricks to cyanide is not a highly probable reaction.{{sfn|Bailer-Gallanda|1991}} Using microdiffusion techniques, they tested 22 samples from the gas chambers and delousing chambers (as [[scientific control#Positive|positive controls]]) and living quarters (as negative controls). They found cyanide residue in both the delousing chambers and the gas chambers but none in the living quarters.{{sfn|Markiewicz|Gubala|Labedz|1994}}