Diagnostics and Chemical Markers of Exposure
The Organic Analytical Toxicology Branch develops and performs unique laboratory tests to measure organic environmental chemicals in people. Examples of available laboratory tests are shown in the table above. It lists the most common names for these chemicals, and their Chemical Abstracts Service (CAS) Registry Numbers. Many of the chemicals, however, go by alternative names. Please visit the National Library of Medicine ChemID database websiteexternal icon and enter the chemical’s CAS Number. The page displayed after this search will include the chemical’s structure, and alternative names.
Laboratory Methods Panels
CDC’s laboratory methods are intended to evaluate population exposures and to support states in situations considered a public health concern. Please see the “Methods’ Access” tab in the tables found after clicking on each of the listed chemicals for additional information regarding these methods. Currently, CDC’s Organic Analytical Toxicology Branch does not have the capability of generating pilot or preliminary results in support of proposals to obtain public or private funds for a larger project.
CAS No. 3739-38-6
CAS No. 77279-89-1
|cis-3-(2,2-Dibromovinyl)-2,2-dimethylcyclopropane carboxylic acid
CAS No. 53179-78-5
|trans-3-(2,2-Dichlorovinyl)-2,2-dimethylcyclopropane carboxylic acid
CAS No. 55701-05-8
Semi-automated solid phase extraction method for the mass spectrometric quantification of 12 specific metabolites of organophosphorus pesticides, synthetic pyrethroids, and select herbicides in human urine
Davis MD, Wade EL, Restrepo PR, Roman-Esteva W, Bravo R, Kuklenyik P, Calafat AM
Journal article published in Journal of Chromatography B, Analytical Technologies in the Biomedical and Life Sciences, 2013.
Population-based biomonitoring of exposure to organophosphate and pyrethroid pesticides in New York City
McKelvey W, Jacobson JB, Kass D, Barr DB, Davis M, Calafat AM, Aldous KM.
Environ Health Perspect. 2013 Nov-Dec;121(11-12):1349-56. doi: 10.1289/ehp.1206015. Epub 2013 Sep 27.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3855501/pdf/ehp.1206015.pdfpdf iconexternal icon
Urinary Concentrations of Insecticide and Herbicide Metabolites among Pregnant Women in Rural Ghana: A Pilot Study
Wylie BJ, Ae-Ngibise KA, Boamah EA, Mujtaba M, Messerlian C, Hauser R, Coull B, Calafat AM, Jack D, Kinney PL, Whyatt R, Owusu-Agyei S, Asante KP.
Int J Environ Res Public Health. 2017 Mar 29;14(4). pii: E354. doi: 10.3390/ijerph14040354.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5409555/pdf/ijerph-14-00354.pdfpdf iconexternal icon
Urinary pyrethroid and chlorpyrifos metabolite concentrations in Northern California families and their relationship to indoor residential insecticide levels, part of the Study of Use of Products and Exposure Related Behavior (SUPERB)
Trunnelle KJ, Bennett DH, Tulve NS, Clifton MS, Davis MD, Calafat AM, Moran R, Tancredi DJ, Hertz-Picciotto I.
Environ Sci Technol. 2014;48(3):1931-9. doi: 10.1021/es403661a. Epub 2014 Jan 24.
Urinary biomarkers of exposure to insecticides, herbicides, and one insect repellent among pregnant women in Puerto Rico
Lewis RC, Cantonwine DE, Anzalota Del Toro LV, Calafat AM, Valentin-Blasini L, Davis MD, Baker SE, Alshawabkeh AN, Cordero JF, Meeker JD. Environ Health. 2014 Nov 19;13:97. doi: 10.1186/1476-069X-13-97.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4258050/pdf/12940_2014_Article_800.pdfpdf iconexternal icon
Cross-sectional biomonitoring study of pesticide exposures in Queensland, Australia, using pooled urine samples
Heffernan AL, English K, Toms L, Calafat AM, Valentin-Blasini L, Hobson P, Broomhall S, Ware RS, Jagals P, Sly PD, Mueller JF. Environ Sci Pollut Res Int. 2016 Dec;23(23):23436-23448. Epub 2016 Sep 10.
https://link.springer.com/content/pdf/10.1007%2Fs11356-016-7571-7.pdfpdf iconexternal icon
CDC’s laboratory methods are intended to evaluate population exposures and to support states in situations considered a public health concern. CDC does not provide individual health care or assessment unless as part of a broader public health investigation requested by federal or state agencies, such as a health department. Currently, CDC’s Organic Analytical Toxicology Branch does not have the capability of generating pilot or preliminary results in support of proposals to obtain public or private funds for a larger project.
Detecting levels of an environmental chemical in a person’s blood or urine does not necessarily mean the chemical will cause adverse health effects or disease. Advances in analytical methods enable CDC to measure very low levels of environmental chemicals in people, but research studies of varying levels of exposure are needed to determine if specific levels cause health effects. Consulting a clinician with a toxicological background to assist with the interpretation of results is recommended.
Samples to be tested should be processed through a state health department laboratory, and should conform to the laboratory’s reporting procedures. These laboratory methods often require that the sample be collected by a particular method, or sometimes with particular pre-screened collection devices, to minimize external contamination. Following the correct sample collection protocol is necessary for accurate sample measurement. Please contact the laboratory that will be analyzing the sample to learn the sample collection instructions before collecting the samples.
Contact DLSLab@cdc.gov for more information or questions about these laboratory methods.