1,3-Dichloropropene
1,3-Dichloropropene, sold under diverse trade names, is an organochlorine compound with the formula. 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 acts non-specifically and is in IRAC class 8A. It is widely used in the US and other countries, but is banned in 34 countries.
Production, chemical properties, biodegradation
It is a byproduct in the chlorination of propene to make allyl chloride.It is usually obtained as a mixture of the geometric isomers, called -1,3-dichloropropene, and -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.
Safety
The TLV-TWA for 1,3-dichloropropene is 1 ppm. It is a contact irritant. A wide range of complications have been reported.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 has determined that 1,3-dichloropropene may reasonably be anticipated to be a carcinogen. The International Agency for Research on Cancer has determined that 1,3-dichloropropene is possibly carcinogenic to humans. The EPA has classified 1,3-dichloropropene as a probable human carcinogen.Use
1,3-Dichloropropene is used as a pesticide in the following crops:| Crop | Pounds | Primary Pesticide? |
| Tobacco | 12,114,887 | Yes |
| Potatoes | 12,044,736 | Yes |
| Sugar Beets | 5,799,613 | Yes |
| Cotton | 3,735,543 | Yes |
| Peanuts | 3,463,003 | Yes |
| Sweet Potatoes | 1,210,872 | Yes |
| Onions | 674,183 | Yes |
| Carrots | 531,752 | Yes |
| Watermelons | 133,801 | No |
| Cantaloups | 121,395 | No |
| Cucumbers | 76,735 | No |
| Strawberries | 71,753 | No |
| Sweet Peppers | 28,247 | No |
| Melons | 12,471 | No |
| Blueberries | 3,090 | No |
| Asparagus | 1,105 | No |
Contamination
The ATSDR has extensive contamination information available.Image:Frequency of npl sites with DCP contam.png|frame|none|Frequency of NPL Sites with 1,3-Dichloropropene Contamination