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![]() Under the U.S. Labeling of Hazardous Art Materials Act (LHAMA) of 1990, all art materials sold in the United States must be evaluated by a qualified toxicologist and labeled, if necessary, for chronic toxicity according to the Chronic Hazard Labeling Standard, ASTM D4236. Product formulations are first reviewed by a toxicologist who determines what analyses need to be performed. Once the results are obtained, the toxicologist evaluates the results for toxicity. |