**CERTIFICATION**

I,Geoffery E. Merszei, Executive Vice President and Chief Financial Officer ofAlcan Inc. (''Alcan''), certify that:

| 1. | I have reviewed this annual report on Form10‐K of Alcan;                                                                                                                                                                                                                                          |
|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2. | Based on my knowledge,this report does not contain any untrue statement of a material fact or omit tostate a material fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleading withrespect to the period covered by this report;  |
| 3. | Based on my knowledge, the financial statements, and otherfinancial information included in this report, fairly present in all materialrespects the financial condition, results of operations and cash flows of theregistrant as of, and for, the periods presented in this report;                    |

| 4. | The registrant's other certifyingofficers and I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a‐15(e) and15d‐15(e)) and internal control over financial reporting (as defined inExchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:  |
|----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| a) | Designed such disclosure controlsand procedures, or caused such disclosure controls and procedures to bedesigned under our supervision, to ensure that material information relating tothe registrant, including its consolidated subsidiaries, is made known to us byothers within those entities, particularly during the period in which thisreport is being prepared;           |
|----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| b) | Designed such internal controlover financial reporting, or caused such internal control over financialreporting to be designed under our supervision, to provide reasonable assuranceregarding the reliability of financial reporting and the preparation of financialstatements for external purposes in accordance with generally acceptedaccounting principles;                  |
| c) | Evaluated the effectiveness of theregistrant's disclosure controls and procedures and presented in this reportour conclusions about the effectiveness of the disclosure controls andprocedures, as of the end of the period covered by this report based on suchevaluation; and                                                                                                     |
| d) | Disclosed in this report anychange in the registrant's internal control over financial reporting thatoccurred during the registrant's most recent fiscal quarter (the registrant'sfourth fiscal quarter in the case of an annual report) that has materiallyaffected, or is reasonably likely to materially affect, the registrant'sinternal control over financial reporting; and  |

| 5. | The registrant's other certifying officers and Ihave disclosed, based on our most recent evaluation of internal control overfinancial reporting, to the registrant's auditors and the audit committee ofregistrant's board of directors (or persons performing the equivalent function):  |
|----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| a)  
Allsignificant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely toadversely affect the registrant's ability to record, process, summarize andreport financial information; and 

b)  
Anyfraud, whether or not material, that involves management or other employees whohave a significant role in the registrant's internal control over financialreporting. 
Date: 14 March 2005
/s/ Geoffery E. Merszei              
 
Geoffery E. Merszei
 
Executive Vice President and
 
ChiefFinancial Officer

  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|