Telone

1,3-Dichloropropene

1,3-Dichloropropene

Chemical compound

Not to be confused with 1,3-dichloropropane.

Quick Facts Names, Identifiers ...

1,3-Dichloropropene, sold under diverse trade names, is an organochlorine compound with the formula C3H4Cl2. It is a colorless liquid with a sweet smell. It is feebly soluble in water and evaporates easily. It is used mainly in farming as a pesticide, specifically as a preplant fumigant and nematicide. It is widely used in the US and other countries, but is banned in 34 countries (including the European Union).[4]

Production, chemical properties, biodegradation

It is a byproduct in the chlorination of propene to make allyl chloride.[5]

It is usually obtained as a mixture of the geometric isomers, called (Z)-1,3-dichloropropene, and (E)-1,3-dichloropropene. Although it was first applied in agriculture in the 1950s, at least two biodegradation pathways have evolved. One pathway degrades the chlorocarbon to acetaldehyde via chloroacrylic acid.[6]

Safety

The TLV-TWA for 1,3-dichloropropene (DCP) is 1 ppm.[7] It is a contact irritant. A wide range of complications have been reported.[8]

Carcinogenicity

Evidence for the carcinogenicity of 1,3-dichloropropene in humans is inadequate, but results from several cancer bioassays provide adequate evidence of carcinogenicity in animals. In the US, the Department of Health and Human Services (DHHS) has determined that 1,3-dichloropropene may reasonably be anticipated to be a carcinogen. In California, the Office of Environmental Health Hazard Assessment has determined that 1,3-dichloropropene is a carcinogen, and in 2022 established a No Significant Risk Level (NSRL) of 3.7 micrograms/day.[9] The International Agency for Research on Cancer (IARC) has determined that 1,3-dichloropropene is possibly carcinogenic to humans. The EPA has classified 1,3-dichloropropene as a probable human carcinogen.[8]

Use

1,3-Dichloropropene is used as a pesticide in the following crops:[10]

More information Crop, Pounds (lb) ...

Contamination

The ATSDR has extensive contamination information available.[11]

Frequency of NPL Sites with 1,3-Dichloropropene Contamination

Market history

Under the brand name Telone, 1,3-D was one of Dow AgroSciences's products until the merger into DowDuPont. Then it was spun off with Corteva, and as of 2020 has been licensed to Telos Ag Solutions and is no longer a Corteva product.[1][2]

References

  1. [1]
    Martin, Frank N. (2003). "Development of Alternative Strategies for Management of Soilborne Pathogens Currently Controlled with Methyl Bromide". Annual Review of Phytopathology. 41 (1). Annual Reviews: 325–350. doi:10.1146/annurev.phyto.41.052002.095514. ISSN 0066-4286. PMID 14527332.
  2. [2]
    "Telone soil fumigant to be distributed by Telos Ag Solutions". Vegetable Growers News. 17 November 2020. Retrieved 6 July 2021.
  3. [3]
    NIOSH Pocket Guide to Chemical Hazards. "#0199". National Institute for Occupational Safety and Health (NIOSH).
  4. [4]
    COMMISSION DECISION of 13 May 2022 concerning the non-approval of the active substance 1,3-dichloropropene, Official Journal of the European Union, 13 May 2022.
  5. [5]
    Krähling, Ludger; Krey, Jürgen; Jakobson, Gerald; Grolig, Johann; Miksche, Leopold (15 June 2000), "Allyl Compounds", Ullmann's Encyclopedia of Industrial Chemistry, Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, doi:10.1002/14356007.a01_425, ISBN 3527306730, retrieved 18 March 2022
  6. [6]
    Poelarends, Gerrit J.; Whitman, Christian P. (1 October 2004). "Evolution of enzymatic activity in the tautomerase superfamily: mechanistic and structural studies of the 1,3-dichloropropene catabolic enzymes". Bioorganic Chemistry. Mechanistic Enzymology. 32 (5): 376–392. doi:10.1016/j.bioorg.2004.05.006. ISSN 0045-2068. PMID 15381403.
  7. [7]
    Robert L. Metcalf "Insect Control" in Ullmann's Encyclopedia of Industrial Chemistry" Wiley-VCH, Wienheim, 2002. doi:10.1002/14356007.a14_263
  8. [8]
    "ToxFAQs – Letter A | Toxic Substance Portal | ATSDR".
  9. [9]
    "Proposition 65: No Significant Risk Level for 1,3-Dichloropropene (1,3-D)". oehha.ca.gov. 21 June 2022. Retrieved 26 October 2022.
  10. [10]
    "National Totals of Pesticide Use (pounds applied and acres treated) by Crop and Compound". United States Geological Survey. Archived from the original on 10 April 2007.
  11. [11]
    "TOXICOLOGICAL PROFILE FOR DICHLOROPROPENES" (PDF). Agency for Toxic Substances and Disease Registry. September 2008.

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