NEW YORK (AP) - It's the mystery under the kitchen sink.

What's in floor cleaner? What's stain remover made of? And what effects - if any - might they have on human health or the environment?

Environmental advocates want to know. They asked a court Wednesday to use a 1971 New York state law to force manufacturers to reveal exactly what makes up such household staples as Ajax, Ivory soap and Tide.

The cleaning-products industry notes that it recently ramped up voluntary efforts to disclose product ingredients. The Soap and Detergent Association, a trade group, says the activists' legal case is unwarranted and fears about health risks are off-base.

Groups including the American Lung Association and the Sierra Club want the public to know more. They hope the New York case will help fuel nationwide reform.