Interpolatory product quadratures for Cauchy principal value integrals with Freud weights

We prove convergence results and error estimates for interpolatory product quadrature formulas for Cauchy principal value integrals on the real line w ith Freud-type weight functions. The formulas are based on polynomial inter polation at the zeros of orthogonal polynomials associated with the weight function under consideration. As a by-product, we obtain new bounds for the derivative of the functions of the second kind for these weight functions.