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Posted By Kevin_20056
Hello
I made researches on pesticides and found that many of the active ingredients are not assigned with a wel but LD50 are available.
Can I use the the LD50 instead of the wel to inform users on the limit to be used and how do I interprete the LD5o
thanks
kevin
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Posted By Paul Leadbetter
Kevin
Since, by definition, the LD50 kills half of those animals exposed, I think the figures are inappropriate as a substitute for WELs. However, they could be used to rank the materials by toxicity. Are there any occupational exposure limits published elsewhere (TLVs, MAKs, etc.)?
Paul
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Posted By Mike Kevin For checking limit values of other countries this is the best available source at the moment. http://www.hvbg.de/e/bia.../limit_values/index.htmlThe ACGIH TLV list has about 55 pesticides. Pre-2005 UK OES list about 45. Other countries have much the same list. I think the number of permitted pesticides is still about 10 times that number. You will probably draw a blank as there is virtually no independent development of LVs outside the countries in the above database. I know this doesn't answer the general question about pesticides which have no LV but I thought the database info would be useful to some.
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Posted By Mike
I noticed that the ACGIH TLVs are not included in the BGIA database, only the OSHA PELs. Might be a copyright problem.
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