摘要: |
The National Toxicology Program (NTP) and the National Institute of Environmental Health Sciences (NIEHS) established the NTP Center for the Evaluation of Risks to Human Reproduction (CERHR) in June 1998. The purpose of the Center is to provide timely, unbiased, scientifically sound evaluations of human and experimental evidence for adverse effects on reproduction and development caused by agents to which humans may be exposed. Styrene was selected for expert panel evaluation because of public concern for the possible health effects of human exposures and recently available exposure data. Styrene (ethenylbenzene; CAS RN: 100-42-5) is a high production volume chemical used in the production of polystyrene resins and as a co-polymer with acrylonitrile and 1,3-butadiene. Styrene is found in items such as foam cups, dental fillings, matrices for ion exchange filters, construction materials, and boats. It is also used in protective coatings, reinforced glass fiber, agricultural products, and as a food additive. In addition to occupational exposures, the general public can be exposed to styrene by ingesting food or drink that has been in contact with styrene polymers or through inhalation of polluted air or cigarette smoke. |