But they didn’t know this chemical’s molecular formula or structure. Now the mystery molecule has been identified as the chloronitramide anion. Little is known about this anion or its toxicity.

For more than four decades, scientists have noticed a mysterious chemical in the treated drinking water of millions of people in the United States, but no one’s been able to pinpoint exactly ...

Isotopologues are molecules that have the same chemical formula and whose atoms bond in similar arrangements, ... For example, a water molecule (H 2 O) ...

A newly identified chemical byproduct may be present in drinking water in about a third of U.S. homes, a study found. Scientists think it might be toxic but do not yet know.