Members ASASP has 9 member companies representing the majority of synthetic amorphous silica (SAS) producers in Europe. Members Cabot Corporation (B) Evonik Operations GmbH (D) Grace (D) IQE Group (S) PPG Corporation (NL) PQ Corporation (UK) Solvay S.A. (B) Wacker Chemie AG (D) Zeochem AG (CH)