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2-Butanone (methyl ethyl ketone). Inhalation of 2-butanone can cause <br /> conjunctiva irritation and unspecified effects on the nose and respiratory <br /> system It is a strong irritant The current OSHA PEL for 2-butanone is <br /> 200 ppm <br /> Benzene. Benzene is a known human carcinogen that can cause leukemia <br /> via chronic exposure It is a severe eye and moderate skin irritant <br /> Human effects by inhalation and ingestion include euphoria, changes in <br /> sleep and motor activity, nausea and vomiting, other blood effects, <br /> dermatitis, and fever In industry, inhalation is the primary route of <br /> chronic benzene poisoning Poisoning by skin contact has also been <br /> reported Although the current Occupational Safety and Health <br /> Administration (OSHA) Permissible Exposure Limit (PEL) for benzene is 1 <br /> ppm, recent research (1987) indicates that effects are seen at less than 1 <br /> ppm over extended periods <br /> Ethylbenzene. Ethylbenzene is mildly toxic by inhalation and skin <br /> contact Inhalation can cause eye, sleep, and pulmonary changes It is an <br /> eye and skin irritant at levels as low as 01% (1,000 ppm) of the vapor in <br /> air At higher concentrations, it is extremely irritating at first, then can <br /> cause dizziness, irritation of the nose and throat, and a sense of <br /> constriction in the chest The current OSHA PEL is listed as 100 ppm <br /> Toluene Human systemic effects of exposure to toluene include central <br /> nervous system changes, hallucinations or distorted perceptions, motor <br /> activity changes, psychophysiological changes and bone marrow changes <br /> It is a severe eye irritant and an experimental teratogen The current <br /> OSHA PEL is Iisted as 100 ppm <br /> Xylene. Xylene exhibits the general chlorinated hydrocarbon central <br /> nervous system effects and olfactory (smell) changes, eye irritation and <br /> pulmonary changes It is a severe skin irritant Irritation can start at 200 <br /> ppm The current OSHA PEL is listed as 100 ppm for all three isomers <br /> (ortho, meta and para) <br /> Vinyl chloride. Vinyl chloride is a known human carcinogen which <br /> causes liver and blood tumors It is a poison by inhalation It is also a <br /> severe skin and eye irritant and can cause skin burns by rapid evaporation <br /> and consequent freezing Chronic exposure has also shown liver injury <br /> The current OSHA PEL is listed as 1 ppm due to its known carcinogenicity <br /> 3 <br />