The Telegraph states that one can buy laundry borax at pharmacies or storefronts, such as Boots, Tesco or Wilko. One can also purchase borax online from pharmaceutical or chemical supply stores, such as Greenshop, Mistral Chemicals or Intra Laboratories.
About.com Chemistry explains that borax, or sodium borate, is a white powder that is used in a variety of applications including the creation of cosmetics and laundry detergent. Borax has been used as an insecticide and fungicide. Borax increases the effectiveness of other cleaning agents, such as bleach, by producing a pH buffer in solutions.
Although borax is used in many ways, some agencies such as the European Union have identified borax as a potentially dangerous substance. Wikipedia notes that borax is part of the European Union's Substance of Very High Concern list. Accordingly, any product containing borax must be labeled with "May damage fertility" and "May damage the unborn child." Because borax is on the Substance of Very High Concern list, European consumers often have difficulty finding and purchasing borax. Not all stores in the same grocery chain carry borax. The consumer's best bet is to call a local pharmacy for product availability or to look for borax online at laboratory or chemical suppliers. When using borax, wear safety goggles and gloves and avoid using the powder around food.