[QSAR] herbicide or pesticide database

[List for Members of Cheminformatics and QSAR Society]

Hi Hatice

The reference to TD50 in CPDB can be of help for a rough preliminary 
comparisonm, in terms of relative ranks. TD50 are measures of 
carcinogenic toxicity, and not of general toxicity: however it 
appears that they are often correlated to LD50. But -and this is 
important- only in terms of ranks. The real LD50 values can be 
different in numerical terms. If you go into the literature, there 
are studies that correlate TD50 and LD50. For the chemicals 
bioassayed by NTP, you may find useful toxicity measures in the 
technical reports.

regards

At 04:23 PM 1/31/2008, you wrote:
>Dear all,
>I have to find out the lethal dose 50 values of some herbicides.If 
>somene knows the database of herbicide lethal dose 50, please sent 
>the web address or literature sources.
>Many thanks and kind regards
>
>Hatice Can
>
>
> 
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Romualdo Benigni

Experimental and Computational Carcinogenesis Unit
Environment and Health Department
Dipartimento di Ambiente e connessa Prevenzione Primaria
Istituto Superiore di Sanita'
Viale Regina Elena 299
00161  Rome  Italy

tel +39 06 4990 2579
fax +39 06 4938 7139
e-mail: rbenigni at iss.it