Abstract. We prove an integral version of the Schur-Weyl duality between the specialized Birman-Murakami-Wenzl algebra B n (−q 2m+1 , q) and the quantum algebra associated to the symplectic Lie algebra sp 2m . In particular, we deduce that this Schur-Weyl duality holds over arbitrary (commutative) ground rings, which answers a question of Lehrer and Zhang in the symplectic case. As a byproduct, we show that, as a Z[q, q −1 ]-algebra, the quantized coordinate algebra defined by Kashiwara (which he denoted by A Z q (g)) is isomorphic to the quantized coordinate algebra arising from a generalized Faddeev-Reshetikhin-Takhtajan construction.