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Q&As since 1989


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Is PARA-DI-CHLORO-BENZEN carcinogenic?

I do research on the taxonomy of Orthoptera, an order of Insecta or Hexapoda. I work in an insect museum. We add a small vial containing PARA-DI-CHLORO-BENZEN to the boxes of dried insects for avoiding the attack of Dermestidae. I wonder if the vapour or smell of this poison is carcinogenic for human or not and to what extend it is dangerous for me?

Mohsen Mofidi-Neyestanak
Plant Pests and Diseases Research Institute,Insect Taxonomy Research Dept. - Tehran, Iran
2003

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According to OSHA, p-dichlorobenzene has a PEL of 75ppm for an 8 hour TWA. It is a respiratory irritant and possibly a skin one too. It is classified as a Category 2B carcinogen, so they rate it as a possible carcinogen. There is however, very little evidence for its carcinogenic properties in real life. p-DCB has a smell similar to mothballs and is used as an insecticide.

Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK
2003