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American Chemistry Council Files Lawsuit to Remove DINP from Prop 65 List


Contact: Lisa Dry (202) 249-6523
Email: Lisa_Dry@americanchemistry.com

Listing is unwarranted—DINP is not a human carcinogen

WASHINGTON (June 11, 2014) – The American Chemistry Council (ACC) Monday filed a lawsuit challenging the state of California’s listing of diisononyl phthalate (DINP) under the Safe Drinking Water and Toxic Enforcement Act of 1986, also known as Proposition 65. The state’s listing of DINP as “known to cause cancer” is unwarranted and defies the state of the science which demonstrates that DINP does not cause cancer in humans.

In its filing in Sacramento County Superior Court, ACC asks that the Court order California Environmental Protection Agency’s (Cal/EPA) Office of Environmental Health Hazard Assessment (OEHHA) to remove DINP from the Proposition 65 list.

Last December, OEHHA’s scientific panel, the Carcinogen Identification Committee (CIC), recommended that DINP be listed as a “carcinogen.” At that time, ACC challenged the scientific basis of California’s proposal to list DINP, provided documentation of extensive scientific data that demonstrates that DINP does not cause cancer in humans, and commented that the basis provided by OEHHA to the CIC for listing failed to identify important aspects of the animal studies that should have been taken into account and that were contrary to the conclusion that the studies provide sufficient evidence of carcinogenicity in humans.

DINP is one of the most thoroughly studied compounds in the world. DINP has been reviewed by numerous international scientific panels over decades and the conclusions are essentially the same each time: DINP used in commercial and consumer products does not pose a risk to human health at typical exposure levels. This conclusion was confirmed most recently by the European Commission (January 2014) following a four-year in-depth evaluation by the European Chemical Agency (ECHA), which did not conclude that DINP is a human carcinogen.

DINP is primarily used to make polyvinyl chloride (PVC) or vinyl flexible and pliant and is therefore used in hundreds of products in our homes, hospitals, cars and businesses. DINP is widely selected because of its strong performance, durability and stability. 

» Learn more about DINP and Prop 65

» Additional information on phthalates

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