NIOSH recommends in this document that worker exposure to arsenic (7440382) and its inorganic compounds, with the exception of arsine and lead-arsenate, be controlled so that no worker is exposed to a concentration of arsenic greater than 0.05mg/m3 determined as a time weighted average exposure for up to a 10 hour workday, 40 hour workweek. Recommendations were given for medical surveillance, labeling of hazardous materials, use of personal protective equipment and clothing, selection of respirators, instructing employees of hazards, effective work practices, sanitation practices, monitoring and record keeping requirements. Occupations with potential arsenic exposure included alloy makers, aniline color makers, metal workers, boiler operators, cattle dip workers, ceramics industry, smelters, defoliant applicators, drug makers, dyeing industry, farmers, enamelers, fireworks makers, glass manufacturing industry, refineries, tanning industry, insecticide makers, chemical manufacturing industry, lead shot makers, leather workers, painters, petroleum refineries, printers, semiconductor industry, taxidermists, textiles industry, type metal workers, weed sprayers, wood preservative makers, and wood workers. Various signs and symptoms associated with arsenic poisoning included nausea, vomiting, diarrhea, dermatitis, peripheral neuropathy, changes in the electrocardiogram, anemia, leukopenia, liver damage, and skin cancer. Occupational exposures have been linked with hyperpigmentation, palmar and plantar hyperkeratoses, warts, contact dermatitis, and sensitization, ulceration and perforation of the nasal septum, conjunctivitis, cirrhosis of the liver and cardiovascular disease.