Article on occupational health problems resulting from exposure to dinitrophenol and its substituted formulas in California in 1975 and 1976 -- Medical treatment information -- Published articles on health effects of dinitrophenols -- Computer listing of pesticides that contain dinitrophenols that were registered for use in California in 1977 and representative labels -- Occupational illnesses in California in 1975 -- Occupational illnesses in California in 1976. Each year in California, there are approximately 40 occupational exposures to the pesticide dinitrophenol or its substituted forms resulting in illnesses that are reported by physicians. Some of these are serious poisoning episodes. These exposures result in systemic illnesses as well as eye and skin damage. There is a lack of awareness among users of these products of how rapidly they pass through the skin and of their potential to cause serious kidney, liver, and brain damage. This product is slowly excreted and is therefore a strong cumulative toxin. The toxicity is greatly increased in hot weather. Death can occur at a later date and not be attributed directly to the exposure due to the delay in onset of the symptoms. Since the LDb50s (rats) ranges from 30 to 60 mg/kg for dinitrophenol and its substituted forms, they are considered to be highly toxic substances. Most labels need considerable revisions on safe handling, first aid advice, and information for physicians. Pesticides containing the dinitrophenols are sufficiently hazardous that they should be placed on the restricted materials list.