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Information on the Regulatory Treatment of Styrene


In 1987 the International Agency for Research on Cancer (IARC) in Lyon, France upgraded styrene's classification from a Group 3 "not classifiable" to a Group 2B "possibly carcinogenic to humans." This reclassification resulted from revisions to IARC's classification system; no new data prompted the reclassification. It is important to note that IARC specifically states that its classifications are intended for hazard identification only, and should not be used for regulatory purposes.

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