This section establishes four Toxicity Categories for acute hazards of pesticide products, Category I being the highest toxicity category. Most human hazard, precautionary statements, and human personal protective equipment statements are based upon the Toxicity Category of the pesticide product as sold or distributed. In addition, toxicity categories may be used for regulatory purposes other than labeling, such as classification for restricted use and requirements for child-resistant packaging. In certain cases, statements based upon the Toxicity Category of the product as diluted for use are also permitted. A Toxicity Category is assigned for each of five types of acute exposure, as specified in the table in this paragraph.
Acute Toxicity Categories for Pesticide Products----------------------------------------------------------------------------------------------------------------
Hazard Indicators I II III IV----------------------------------------------------------------------------------------------------------------Oral LD50....................... Up to and 50 thru 500 5,000
including 50 mg/ 500 mg/kg thru 5,000 mg/kg mg/kg
kgDermal LD50..................... Up to and 200 2000 20,000
including 200 mg/ thru 2000 mg/kg thru 20,000 mg/kg mg/kg
kgInhalation LC50................. Up to and 0.2 2 thru 20 mg/
including 0.2 mg/ thru 2 mg/liter 20 mg/liter liter
literEye irritation.................. Corrosive; corneal Corneal opacity No corneal No irritation
opacity not reversible within opacity;
reversible within 7 days; irritation
7 days irritation reversible within
persisting for 7 7 days
daysSkin irritation................. Corrosive Severe irritation Moderate Mild or slight
at 72 hours irritation at 72 irritation at 72
hours hours----------------------------------------------------------------------------------------------------------------