What is Polychlorinated naphthalene?
'''Polychlorated naphtalenes''', or '''PCN''' are the [[Product (chemistry)|products]] that are made when [[Naphthalene|naphtalene]] is treated with [[chlorine]]. In many respects, these substances are similar to [[Polychlorinated biphenyl]]s, or PCBs.<ref>{{Cite web|date=2016-01-05|title=Polychlorinated naphthalenes, Preliminary Risk Profile|url=http://www.unece.org/fileadmin/DAM/env/lrtap/TaskForce/popsxg/2000-2003/pcn.pdf|url-status=live|access-date=2021-05-11|archive-url=https://web.archive.org/web/20160105194451/http://www.unece.org/fileadmin/DAM/env/lrtap/TaskForce/popsxg/2000-2003/pcn.pdf|archive-date=2016-01-05}}</ref> ==Uses== PCNs are used as [[Insecticide|insicticides]] and as [[fungicide]]s. [[Wood]] is often treated with PCNs to make it more resistant. Sometimes, they are used to produce water-resistant [[dye]]s and colors. Sometimes, they replaces PCBs in the form of artificial [[resin]]s.<ref>{{Cite book|url=http://doi.wiley.com/10.1002/14356007.a06_233.pub2|title=Ullmann's Encyclopedia of Industrial Chemistry|last1=Rossberg|first1=Manfred|last2=Lendle|first2=Wilhelm|last3=Pfleiderer|first3=Gerhard|last4=Tögel|first4=Adolf|last5=Dreher|first5=Eberhard-Ludwig|last6=Langer|first6=Ernst|last7=Rassaerts|first7=Heinz|last8=Kleinschmidt|first8=Peter|last9=Strack|first9=Heinz|date=2006-07-15|publisher=Wiley-VCH Verlag GmbH & Co. KGaA|isbn=978-3-527-30673-2|editor-last=Wiley-VCH Verlag GmbH & Co. KGaA|location=Weinheim, Germany|pages=a06_233.pub2|language=en|doi=10.1002/14356007.a06_233.pub2}}{{Dead link|date=January 2022 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> ==Hazards== Like PCBs, they are very [[poison]]ous. They cause [[chloracne]] when they have direct contact with the [[skin]].<ref>{{Cite journal|last=Teleky|date=April 1927|title=Die Pernakrankheit (Chloracne)|url=http://link.springer.com/10.1007/BF01728520|journal=Klinische Wochenschrift|language=de|volume=6|issue=18|pages=845–848|doi=10.1007/BF01728520|issn=0023-2173|s2cid=30035538}}</ref> There are other symptoms, such as being irri