Signal Word: The USEPA-assigned signal word indicates approximately how toxic a pesticide product is. Products that are highly toxic must display on the label the signal words DANGER POISON along with a skull and crossbones symbol. Products that display only the signal word DANGER are corrosive and can cause irreversible eye damage or severe skin injury. Products that display the signal word WARNING are moderately toxic or can cause moderate eye or skin irritation. Products that display the signal word CAUTION are slightly toxic or may cause slight eye or skin irritation.
Aquatic toxicology: Data for the effects of the compound on various freshwater organisms. Aquatic toxicity levels are usually reported as LC50, which is the concentration lethal to 50 percent of test organisms.