Environmental organizers say Maine regulators are reviewing more than 500 letters in support of new regulations about household chemicals.

The public comment period on new regulations of phthalates closed Monday. Organizers say Maine Department of Environmental Protection got the letters from residents and activists.

Phthalates are used in products like raincoats, vinyl flooring and personal care items. The U.S. Centers for Disease Control and Prevention says some types of phthalates have affected reproductive systems in lab animals. A proposed change would elevate four phthalates from “high concern” to “priority chemical” status under state rules. Manufacturers would need to report the use of the chemicals in products sold in the state.

Maine Department of Environmental Protection officials say Commissioner Patricia Aho has until Jan. 27 to rule on the proposal.

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