According to the AP reports of a CDC study, a chemical used in rocket fuel was found in samples of powdered baby formula, and could exceed what is considered a safe dose for adults if mixed with water also contaminated with the ingredient, a government study has found. The study by scientists looked for the chemical, perchlorate, in different brands of powdered baby formula. The chemical has turned up in several cities’ drinking water supplies. It can occur naturally, but most perchlorate contamination has been tied to defense and aerospace sites.