Document Detail

The fate of dienochlor administered orally and dermally to rats.
MedLine Citation:
PMID:  3764908     Owner:  NLM     Status:  MEDLINE    
Within four days of receiving a single oral dose (1 mg/kg) of [U-ring-14C]dienochlor [bis(pentachloro-2,4-cyclopentadien-1-yl)] female rats excreted 2 and 88% of the applied 14C in urine and feces, respectively. Metabolites could not be identified and the preponderance of the fecal radioactivity consisted of unextractable 14C-labeled residues. Within 1 day virtually all of the dienochlor had been degraded by rats, with only traces of parent dienochlor in excreta and tissues. After four days only 2% of the applied dose remained in tissues (mainly kidney, liver, and gastrointestinal tract). Pharmacokinetic studies with blood plasma and bile showed dienochlor (and/or its metabolites) to be poorly absorbed. Rats were exposed dermally for 24 hr to [14C]dienochlor formulated as Pentac WP miticide both as an aqueous suspension and as an undiluted wettable powder. Half of the dose adhered to the skin and the other half was found in gauze patches used to protect the treated skin. After a 24-hr exposure over 60% of the radiolabel that adhered to skin was removed by washing with an aqueous soap solution and 86% of this rinsing solution was unmetabolized dienochlor. The dienochlor and its metabolites were transported inefficiently from the application site; only 1% of the applied dose was detected in urine plus feces and less than or equal to 0.2% in tissues. With application rates that simulate field exposure by humans, the actual residue of dienochlor and metabolites in skin (i.e., not removable by washing) is about thirteen times higher following exposure to dienochlor as undiluted wettable powder than as an aqueous suspension.
G B Quistad; K M Mulholland; W S Skinner
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Toxicology and applied pharmacology     Volume:  85     ISSN:  0041-008X     ISO Abbreviation:  Toxicol. Appl. Pharmacol.     Publication Date:  1986 Sep 
Date Detail:
Created Date:  1986-10-30     Completed Date:  1986-10-30     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0416575     Medline TA:  Toxicol Appl Pharmacol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  215-20     Citation Subset:  IM    
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MeSH Terms
Administration, Oral
Bile / metabolism
Carbon Radioisotopes / diagnostic use
Feces / analysis
Hydrocarbons, Chlorinated / metabolism*
Insecticides / administration & dosage,  metabolism*
Rats, Inbred Strains
Skin Absorption
Tissue Distribution
Reg. No./Substance:
0/Carbon Radioisotopes; 0/Hydrocarbons, Chlorinated; 0/Insecticides; 2227-17-0/dienochlor

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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