Borax may prove useful in a lot more than laundry detergent. DaimlerChrysler engineers believe a variant of the innocuous white powder provides a safe, compact way to contain hydrogen. The lack of such storage for the notoriously flammable gas has been a key obstacle to the development of fuel-cell-powered cars. Borax's first performance is in a concept minivan called the Chrysler Town & Country Natrium (Latin for sodium, an element in borax).