Exhibit 21.1

SUBSIDIARIES OF MILLIPORE CORPORATION



|                                                     |  |                             
|---------------------------------------------------- |  | ----------------------------
|Company Name                                         |  | Jurisdiction of Organization
|Amicon Ltd.                                          |  | United Kingdom              
|Bioprocessing Corporation Limited                    |  | United Kingdom              
|Bioprocessing Limited                                |  | United Kingdom              
|MicroSafe B.V. Millilux S.a.r.L.                     |  | Netherlands Luxembourg      
|Millipart S.a.r.L.                                   |  | Luxembourg                  
|Millipore Asia Ltd. Millipore Bioscience Caribe Ltd. |  | Delaware Bermuda            
|Millipore Korea Co. Ltd.                             |  | Korea                       
|Millipore Singapore Pte. Ltd.                        |  | Singapore                   
|Millipore Cidra, Inc.                                |  | Delaware                    
|Millipore (Canada) Ltd.                              |  | Canada                      
|Millipore S.A. de C.V.                               |  | Mexico                      
|Millipore GesmbH                                     |  | Austria                     
|Millipore Kft                                        |  | Hungary                     
|Millipore S.R.O.                                     |  | Czech Republic              
|Millipore Sp.z.o.o.                                  |  | Poland                      
|Millipore International Holding Company B.V.         |  | Netherlands                 
|Millipore S.A./N.V.                                  |  | Belgium                     
|Millipore (U.K.) Ltd.                                |  | United Kingdom              
|Millipore S.A.S.                                     |  | France                      
|Millipore Ireland B.V.                               |  | Netherlands                 
|Millipore Dublin International Finance Company       |  | Ireland                     
|Millipore GmbH                                       |  | Germany                     
|Millipore S.p.A.                                     |  | Italy                       
|Millipore AB                                         |  | Sweden                      
|Millipore AS                                         |  | Norway                      
|Millipore AG                                         |  | Switzerland                 
|Millipore A/S                                        |  | Denmark                     
|Millipore Australia Pty. Ltd.                        |  | Australia                   
|Millipore Cork                                       |  | Ireland                     
|Millipore Iberica S.A.                               |  | Spain                       
|Millipore Industria E Comercio Ltda.                 |  | Brazil                      
|Millipore OY                                         |  | Finland                     
|Millipore B.V.                                       |  | Netherlands                 
|Millipore China Ltd.                                 |  | Hong Kong                   
|Millipore S.a.r.L.                                   |  | Luxembourg                  
|Millipore Pacific Limited                            |  | Delaware                    
|Millipore (Shanghai) Trading Company Ltd.            |  | China                       
|Minerva Insurance Co. Ltd.                           |  | Bermuda                     
|MSub                                                 |  | United Kingdom              
|Nihon Millipore K.K.                                 |  | Japan                       
|NovAseptic AB                                        |  | Sweden                      
|NovAseptic France S.A.S.                             |  | France                      
|NovAseptic Innovation A/S                            |  | Norway                      
|NovAseptic Benelux B.V.                              |  | Netherlands                 
|NovAseptic UK Limited                                |  | United Kingdom              
|NovAseptic America Inc.                              |  | New Jersey                  
|NovaSeptum AB                                        |  | Sweden                      
|Protein Separations Ltd.                             |  | United Kingdom