2,4-Dichlorophenoxyacetic acid (2,4-D)

Black and white chemical structure of 2,4-D

CAS Number: 94-75-7

2,4-Dichlorophenoxyacetic acid (2,4-D) is widely used to control weeds in agriculture, recreational areas, lawns and gardens, and along roadsides and railroad tracks.

2,4-Dichlorophenoxyacetic acid (2,4-D) is part of the group of Herbicides. Click here to learn more about this group of chemicals.

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24D_FactSheet.pdf

Fact Sheet

2,4-D is found in

Some home lawn products labeled as weed killers and for “weed and feed” use.
Commercial weed control products used along roadsides and railroad tracks, and in recreational areas such as golf courses, athletic fields, and parks.
Some herbicides for crops such as wheat, almonds, and some citrus and stone fruits.

Possible health concerns of 2,4-D

Scientists are still studying how 2,4-D might affect people’s health. There is concern that 2,4-D:

May interfere with the body’s natural hormones.
May harm the developing fetus.
May increase cancer risk.

Possible ways to reduce exposure to 2,4-D

Use non-chemical methods to control weeds, such as regular mowing and hand-weeding.
If you choose to use a weed killer, spot-treat problem areas and follow warning statements on the label. After application:
- Remove shoes before entering your house; remove clothes that are soiled during application and launder them separately.
- Limit access to 2,4-D treated areas, at least until the product has completely dried; for children and pets, limit access for one to two days or longer if possible.
- Look for posted notices that indicate an area (such as a park or athletic field) has been treated with a weed killer and follow any precautions on the notice.