We investigate the sensitivity to changes in the interior opacities of a number of solar parameters commonly inferred from standard solar models. In particular we discuss the sensitivity of the central temperature, the radius at the base of the convective zone, and the degree of lithium depletion to changes in the opacity prescription. We examine the impact of the new OPAL opacities on these quantities, and we find that further interior opacity increases concentrated around 2 × 10 6 K are indicated from the solar oscillation data. We provide some additional OPAL opacities needed to produce accurate standard solar models