EPA officials have tentatively agreed to allow the pesticide to remain available to eradicate mosquitoes, fleas and other insects as long as the Newport Beach, Calif., manufacturer—Amvac Chemical Corp.—agrees to labeling that restricts its uses, the Los Angeles Times reported in May.

DDVP has been used to kill gypsy moths in traps that monitor the pest. DDVP is also used in pet collars, pest strips and aerosol sprays and is sold under a variety of names.

Environmental groups are concerned about risks associated with the chemical, which is related to World War II-era nerve agents.

DDVP is listed by California as a known carcinogen and is part of a class of chemicals that has been linked to developmental damage in children, the report said. Exposure to DDVP can cause flu-like symptoms, including headaches, nausea and vomiting. In large doses, the chemical is fatal.

Environmental groups say DDVP is one of the most dangerous pesticides on the market. The organizations accuse the EPA of consulting with company officials in “illegal” meetings that did not allow public participation, The Times reported.