Features

• 2,4-D is a chlorophenoxy herbicide -- a synthetic form of plant hormone -- that is water and oil soluble. It is sold in an odorless, white to yellow crystal powder form. Historically, it was one component of Agent Orange, which was used to defoliate regions during military initiatives.
  
  

Toxicity

• When used according to product label directions for dosage and handling, 2,4-D is generally regarded as a moderately toxic compound or moderately hazardous. It's suspected of being an endocrine inhibitor if introduced into the body. Moreover, as a chlorophenoxy, it potentially is carcinogenic, especially if used in a manner inconsistent with label directions.
  
  

Modes of Exposure

• Humans should avoid inhaling, eating and eye or skin contact with both the dry powder and solution forms of 2,4-D. Once wet, the chemical powder can be absorbed through the skin.
  
  

Effects

• Excessive exposure to 2,4-D without proper precautions or safety protection equipment can cause dermatitis, severe eye irritation, central nervous system problems, liver or kidney failure or death in exceptional circumstances according to the U.S. Department of Labor, Occupational Safety and Health Administration.