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WikiProject Chemistry (Rated C-class, Mid-importance)
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Clean Up

The introduction section[edit]

The introduction section is rather long, providing detailed information that would be better as (a) new section(s). There is also explanation of related substances that could very easily be removed, instead just having the link to the article for more information.

Example: The sodium channel consists of a membrane protein with a hydrophilic interior; this interior is effectively a tiny hole which is shaped exactly right to strip away the partially charged water molecules from a sodium ion and create a thermodynamically favorable way for sodium ions to pass through the membrane, enter the axon, and propagate an action potential.

The previous sentence has a link to the article for sodium channels.

I would make changes but I don't trust my own sense of formatting and descriptive helpfulness. -- (talk) 08:40, 2 May 2010 (UTC)


This article contains a contradiction or error. Allethrin was the first pyrethroid. It was first synthesized in 1949 in the United States by Milton S. Schechter at the Agricultural Research Service in Beltsville, Maryland —Preceding unsigned comment added by Steve8009 (talkcontribs) 19:07, 18 May 2010 (UTC)

Also, the first reported use of piperonyl butoxide as a synergist for pyrethrum was in work at U.S. Industrial Chemicals in Baltimore around 1947. Merritt Sarles and Walter E. Dove led that project ( (talk) 21:14, 11 February 2011 (UTC)

Toxity to cats[edit]

Some internet sources suggest that it may be more toxic to cats than, say, humans or dogs. If this is true, some information on such toxicity should be incorporated as being of general importance (given the popularity of cats as pets) I am not an expert and if anyone has authoritative information on this, please incorporate it in the article. Saurabh.jaywant (talk) 11:40, 8 October 2010 (UTC)

Breakdown in sunlight[edit]

The statement that pyrethroids breakdown in sunlight after two days is not supported by the citation. Indeed elsewhere the US EPA has stated that pyrethroids have a half life of 30 days in the soil, and there is strong evidence that microbial action is the primary means of breakdown. Recyclotron (talk) 11:28, 16 October 2010 (UTC)

Unstable in sunlight are the 1-st generation pyrethroids, developed in the 1960s (bioallethrin, tetramethrin, resmethrin etc.). The other ones are much more stable. Krasss (talk) 19:25, 17 October 2010 (UTC)

Orphaned references in Pyrethroid[edit]

I check pages listed in Category:Pages with incorrect ref formatting to try to fix reference errors. One of the things I do is look for content for orphaned references in wikilinked articles. I have found content for some of Pyrethroid's orphans, the problem is that I found more than one version. I can't determine which (if any) is correct for this article, so I am asking for a sentient editor to look it over and copy the correct ref content into this article.

Reference named "Kolb2009":

I apologize if any of the above are effectively identical; I am just a simple computer program, so I can't determine whether minor differences are significant or not. AnomieBOT 20:52, 13 January 2016 (UTC)