Exhibit 21.1

SUBSIDIARIES OF MILLIPORE CORPORATION



|                                               |  |                             
|---------------------------------------------- |  | ----------------------------
|Company Name                                   |  | Jurisdiction of Organization
|                                               | 
|Bioprocessing Corporation Limited              |  | United Kingdom              
|                                               | 
|Bioprocessing Limited                          |  | United Kingdom              
|                                               | 
|Celliance Lawrence, Inc.                       |  | Delaware                    
|                                               | 
|Celliance Limited                              |  | United Kingdom              
|                                               | 
|Celliance Toronto, Inc.                        |  | Canada                      
|                                               | 
|Chemicon Australia                             |  | Australia                   
|                                               | 
|Chemicon Europe Limited                        |  | United Kingdom              
|                                               | 
|Millilux S.a.r.L.                              |  | Luxembourg                  
|                                               | 
|Millipart S.a.r.L.                             |  | Luxembourg                  
|                                               | 
|Millipore (Canada) Ltd.                        |  | Canada                      
|                                               | 
|Millipore (Shanghai) Trading Company Ltd.      |  | China                       
|                                               | 
|Millipore (U.K.) Ltd.                          |  | United Kingdom              
|                                               | 
|Millipore A/S                                  |  | Denmark                     
|                                               | 
|Millipore AB                                   |  | Sweden                      
|                                               | 
|Millipore AG                                   |  | Switzerland                 
|                                               | 
|Millipore AS                                   |  | Norway                      
|                                               | 
|Millipore Asia Ltd.                            |  | Delaware                    
|                                               | 
|Millipore Australia Pty. Ltd.                  |  | Australia                   
|                                               | 
|Millipore B.V.                                 |  | Netherlands                 
|                                               | 
|Millipore Bioscience Caribe Ltd.               |  | Bermuda                     
|                                               | 
|Millipore China Ltd.                           |  | Hong Kong                   
|                                               | 
|Millipore Cork                                 |  | Ireland                     
|                                               | 
|Millipore Dublin International Finance Company |  | Ireland                     
|                                               | 
|Millipore GesmbH                               |  | Austria                     
|                                               | 
|Millipore GmbH                                 |  | Germany                     
|                                               | 
|Millipore Iberica S.A.                         |  | Spain                       
|                                               | 
|Millipore Industria E Comercio Ltda.           |  | Brazil                      
|                                               | 
|Millipore International Holding Company B.V.   |  | Netherlands                 
|                                               | 
|Millipore Ireland B.V.                         |  | Netherlands                 
|                                               | 
|Millipore Kft                                  |  | Hungary                     
|                                               | 
|Millipore Korea Ltd.                           |  | Korea                       
|                                               | 
|Millipore Newco Ireland Limited                |  | Ireland                     
|                                               | 
|Millipore OY                                   |  | Finland                     
|                                               | 
|Millipore Pacific Limited                      |  | Delaware                    
|                                               | 
|Millipore S.A. de C.V.                         |  | Mexico                      
|                                               | 
|Millipore S.A./N.V.                            |  | Belgium                     
|                                               | 
|Millipore S.p.A.                               |  | Italy                       
|                                               | 
|Millipore S.R.O.                               |  | Czech Republic              
|                                               | 
|Millipore SAS                                  |  | France                      
|                                               | 
|Millipore Singapore Pte. Ltd.                  |  | Singapore                   
|                                               | 
|Millipore Sp.z.o.o.                            |  | Poland                      
|                                               | 
|Minerva Insurance Co. Ltd.                     |  | Bermuda                     
|                                               | 
|Nihon Millipore K.K.                           |  | Japan                       
|                                               | 
|Protein Separations Ltd.                       |  | United Kingdom              
|                                               | 
|Serologicals European Holdings Limited         |  | United Kingdom              
|                                               | 
|Serologicals Global Holdings Company Limited   |  | United Kingdom              
|                                               | 
|Serologicals UK Holdings Company Limited       |  | United Kingdom              
|                                               | 
|Upstate Ion Channel Discovery Group Limited    |  | United Kingdom              
|                                               | 
|Upstate Limited                                |  | United Kingdom              
|                                               | 
|Upstate USA, Inc.                              |  | New York