Document Detail


By-side impurities in chloronaphthalene mixtures of the Halowax series: all 19 chlorophenols.
MedLine Citation:
PMID:  15332666     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
All seven Halowax formulations examined were contaminated with chlorophenols (CPhs). The total CPhs content of the CN mixtures ranged from 1050 to 34,200 ng/g. The absolute concentration of CPhs decreased with an increase of degree of chlorination (% Cl) of the Halowax 1031 (27%), 1000 (35%), 1001 (49%), and 1099 (51%), respectively, but remained relatively constant for higher chlorinated Halowax 1099 (51%), 1013 (54%), 1014 (59%), and 1051 (70%). 2,4,6-TrCPh and 2,4-DiCPh did contaminated all seven Halowax formulations and PeCPh remained undetected (<90 ng/g) only in Halowax 1099, while less frequently occurred 2,6-DiCPh and followed by 3-/4-MoCPh, 2,5-DiCPh, 2-MoCPh, 2,3-DiCPh, and 2,3,4,6-TeCPh. The CPh congeners such as 3,4-DiCPh, 3,5-DiCPh, 2,3,4-TrCPh, 2,3,5-TrCPh, 2,3,6-TrCPh, 2,4,5-TrCPh, 3,4,5-TrCPh, 2,3,4,5-TeCPh, and 2,3,5,6-TeCPh were undetected in any of the Halowax formulation examined. The profile (%) of higher chlorinated CPh homologues like PeCPh in the Halowaxes followed somehow a degree of chlorination (Cl %) of the parent mixture, i.e., increased from 14, 22, 43, 55, 52 to 80%, respectively, but exception was free of PeCPh the Halowax 1099. And contrary, for a lower chlorinated DiCPhs and TrCPhs their relative proportions decreased but again an exception was Halowax 1099. The fingerprint profiles of 2,4,6-TrCPh, 2,4-DiCPh, and PeCPh, which were usually the most abundant congeners varied and were less consisted when compared to the CPh homologue group profiles, and also more depended on the type of technical Halowax mixture. Due to absence of 2,4,5-TrCPh but presence of 2,4-DiCPh, 2,6-DiCPh, 2,4,6-TrCPh, and PeCPh, which, respectively, are indicative congeners for CPhs obtained by alkaline hydrolysis of chlorobenzenes or phenol chlorination using gaseous chlorine, just co-occurrence of phenol impurity in technical naphthalene is suggested as a solely source of CPhs in the Halowax mixtures.
Authors:
Y Noma; T Yamamoto; J Falandysz; A Gutfrańska; E Lukaszewicz; S Sakai
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering     Volume:  39     ISSN:  1093-4529     ISO Abbreviation:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Publication Date:  2004  
Date Detail:
Created Date:  2004-08-30     Completed Date:  2004-10-19     Revised Date:  2009-08-14    
Medline Journal Info:
Nlm Unique ID:  9812551     Medline TA:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2023-34     Citation Subset:  IM    
Affiliation:
National Institute for Environmental Studies, Tsukuba, Japan. noma@nies.go.jp
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MeSH Terms
Descriptor/Qualifier:
Chlorophenols / analysis*,  chemistry
Environmental Monitoring
Environmental Pollutants / analysis*
Hazardous Waste
Industrial Waste
Manufactured Materials / standards
Chemical
Reg. No./Substance:
0/Chlorophenols; 0/Environmental Pollutants; 0/Hazardous Waste; 0/Industrial Waste

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


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