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| Content Provider | OECD iLibrary |
|---|---|
| Organization | OECD |
| Abstract | Cette méthode permet l’estimation de la CL50 avec un intervalle de confiance, et les résultats permettent de classer une substance pour la toxicité aiguë selon le Système Général Harmonisé de Classification et d'Étiquetage des Produits Chimiques. Il est le plus facile de l'appliquer aux substances produisant la mort dans les deux jours. Cette Ligne directrice utilise des rongeurs (de préférence femelle rat). Il y a un essai limite et un essai principal. L'essai limite peut être employé efficacement pour identifier les produits chimiques qui sont susceptibles d'avoir une basse toxicité. La substance d'essai est généralement administrée par une dose unique, par gavage, aux animaux à jeun avant le traitement. Des animaux uniques sont dosés un par un, habituellement toutes les 48h. Le premier animal est dosé un niveau au-dessous des meilleures évaluations préliminaires de la CL50. Le deuxième animal reçoit une dose inférieure (si le premier animal meurt) ou une dose supérieure (si le premier animal survit). On observe les animaux avec une attention particulière pendant les 4 premières heures et quotidienne ensuite, pendant un total de 14 jours généralement. Le poids des animaux devrait être déterminé au moins une fois par semaine. Tous les animaux devraient être soumis à une autopsie générale. La CL50 est calculée suivant la méthode de maximum de vraisemblance. Il est possible de calculer des évaluations d'intervalle pour la CL50. Plus l'intervalle est étroit et meilleure est l'évaluation de la CL50. Logiciel à utiliser pour les essais 425, 432, 455. Cliquer ici . Logiciel non couvert par l’Acceptation Mutuelle des Données. |
| Page Count | 29 |
| ISSN | 20745842 |
| e-ISBN | 9789264071056 |
| Language | French |
| Publisher | OECD Publishing |
| Publisher Date | 2008-10-16 |
| Access Restriction | Open |
| Subject Keyword | Environment |
| Content Type | Text |
| Resource Type | Book |
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