ATSDR - Toxic Substances - Dichloropropenes
Skip directly to search Skip directly to A to Z list Skip directly to site content Skip directly to page options


CAS ID #: 26952-23-8, 542-75-6

Affected Organ Systems: Respiratory (From the Nose to the Lungs)

Cancer Classification: IARC: 1,3-dichloropropene: possibly carcinogenic to humans. NTP: 1,3-dichloropropene: Reasonably anticipated to be a human carcinogen

Please contact NTP, IARC, or EPA’s IRIS Hotline with questions on cancer and cancer classification.

Chemical Classification: Volatile organic compounds


Dichloropropenes are synthetic chemicals made of a chain of three carbon atoms with a double bond connecting the first two carbons. Two chlorine atoms are attached at varying positions on this carbon chain generating five different types or isomers of dichloropropene molecules. The names of the isomers are 1,1-dichloropropene 1,2-dichloropropene 1,3-dichloropropene 2,3-dichloropropene and 3,3-dichloropropene.

1,3-Dichloropropene is a colorless liquid with a sweet smell. It dissolves in water and evaporates easily. It is used mainly in farming as a pesticide. Much less is known about the other dichloropropenes. 2,3-Dichloropropene is used in industry to make other chemicals. No uses were found for 1,1-, 1,2-, or 3,3-dichloropropene.

Because1,3-dichloropropene is produced and used in much higher amounts than the other isomers and because it is released to the environment as a pesticide, most of the data available are for 1,3-dichloropropene. Therefore, the focus of this summary is the 1,3-dichloropropene isomer.

Community Members 

Community Members
  • ToxFAQs

    Fact sheet that answers the most frequently asked questions about a contaminant and its health effects.

  • Public Health Statement

    Summary about a hazardous substance taken from Chapter One of its respective ATSDR Toxicological Profile.

  • Toxicological and Health Professionals 

    Toxicological and Health Professionals
  • Toxicological Profile

    Succinctly characterizes the toxicologic and adverse health effects information for a hazardous substance.

  • ToxGuide (PDF, 120KB*)

    Quick reference guide providing information such as chemical and physical properties, sources of exposure, routes of exposure, minimal risk levels, children's health, and health effects for a substance.

  • Priority List of Hazardous Substances

    Prioritization of substances based on a combination of their frequency, toxicity, and potential for human exposure at National Priorities List (NPL) sites.

  • Minimal Risk Levels (MRL)

    The MRL is an estimate of the daily human exposure to a hazardous substance that is likely to be without appreciable risk of adverse, non-cancer health effects over a specified duration of exposure. The information in this MRL serves as a screening tool to help public health professionals decide where to look more closely to evaluate possible risk of adverse health effects from human exposure.

  • Top of Page

    Contact Us:
    • Agency for Toxic Substances and Disease Registry
      4770 Buford Hwy NE
      Atlanta, GA 30341
    • 800-CDC-INFO
      TTY: (888) 232-6348
    • New Hours of Operation
      8am-8pm ET/Monday-Friday
      Closed Holidays
      Contact CDC-INFO The U.S. Government's Official Web PortalDepartment of Health and Human Services
    Agency for Toxic Substances and Disease Registry, 4770 Buford Hwy NE, Atlanta, GA 30341
    Contact CDC: 800-232-4636 / TTY: 888-232-6348

    A-Z Index

    1. A
    2. B
    3. C
    4. D
    5. E
    6. F
    7. G
    8. H
    9. I
    10. J
    11. K
    12. L
    13. M
    14. N
    15. O
    16. P
    17. Q
    18. R
    19. S
    20. T
    21. U
    22. V
    23. W
    24. X
    25. Y
    26. Z
    27. #