Exhibit 21.1 SUBSIDIARIES OF ACETO CORPORATION State or other jurisdiction of Subsidiary corporation or organization - ---------- --------------------------- Acci Realty Corp. New York Aceto Agricultural Chemicals Corp. New York Aceto Industrial Chemical Corp. New York Arsynco, Inc. New Jersey Larlabs, Inc. New York Roehr Chemicals, Inc. New York CDC Products Corp. New York Aceto Sanitary Corp. New York Aceto Holding GmbH Germany Aceto Pharna GmbH Germany Aceto Finechem GmbH Germany Pharma Waldhof GmbH Germany Aceto Luxembourg S.a.r.L. Luxembourg Aceto (Holding) B.V. The Netherlands Aceto B.V. The Netherlands Aceto France S.A.S France Aceto Ltd. Bermuda Aceto Pharma GmbH - India India Aceto Pte Ltd. Singapore Aceto (Hong Kong) Ltd. Hong Kong Aceto (Shanghai) Ltd. China Aceto Pharmaceutical (Shanghai) Ltd. China Aceto Agricultural Chemical Corporation Limited United Kingdom