“…The ear and neurotoxicity of chemical agents from dust, oils and solvents, for example, toluene, benzene, styrene and others, may cause damage both to the peripheral and central hearing systems, in general being absorbed by the respiratory system and skin, also being able to cause cochlear dysfunction 4,31,32 . The gases and toxic smokes, such as carbon monoxide, carbon disulfide and pesticides with high toxicity levels, have ototoxic effects and induce deleterious changes to hearing, especially when the prolongs exposure of the worker to this risk factor occurs 16,19,28 .…”