2,4-Dichlorophenoxyacetic acid
2,4-Dichlorophenoxyacetic acid (pronounced as two-four-dye-kloro-fen-ox-ee-acetic acid), often abbreviated as 2,4-D, is a common systemic herbicide used in the control of broadleaf weeds. It is the most widely used herbicide in the world, and the third most commonly used in North America.
Etymology
The name 2,4-Dichlorophenoxyacetic acid is derived from its chemical structure, which consists of two chlorine atoms (dichloro), a phenol group (phenoxy), and an acetic acid group.
Chemical Structure and Properties
2,4-D is a white crystalline solid with a slightly sweet smell. It is soluble in water and most organic solvents. It is a weak acid, with a pKa of 2.7. The chemical formula for 2,4-D is C8H6Cl2O3.
Uses
2,4-D is used in many herbicide formulations for the control of broadleaf weeds in crops, pastures, and non-crop areas. It is also used in some types of forestry and aquatic applications.
Health Effects
Exposure to 2,4-D can cause a range of health effects, from minor skin irritation to serious effects on the nervous system. Long-term exposure can potentially lead to cancer and other health problems.
Environmental Impact
2,4-D is highly toxic to aquatic life and can cause long-term adverse effects in the aquatic environment. It is also toxic to bees and other beneficial insects.
Regulation
In many countries, the use of 2,4-D is regulated due to its potential health and environmental impacts. In the United States, it is classified as a Restricted Use Pesticide (RUP) by the Environmental Protection Agency (EPA).
See Also
External links
- Medical encyclopedia article on 2,4-Dichlorophenoxyacetic acid
- Wikipedia's article - 2,4-Dichlorophenoxyacetic acid
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