No definitive explanation has been given for the whiskering, though it is known to be mitigated by the presence of some lead, gold, antimony or indium. Gold has been cited as the most successful additive besides lead in controlling whiskering, but it adds to the cost of the component and has not been used widely. For the most part, RoHS-compliant components use pure tin. Some in the components industry say that only electroplated tin will grow electrically conductive tin whiskers. Yet many engineers insist that any form of pure tin will grow whiskers.