**Exhibit31.2**

**CERTIFICATION**

 

I,Michael Hanley, Executive Vice President and Chief Financial Officer of AlcanInc. (''Alcan''), certify that:

| 1.     | I have reviewed this		quarterly report on Form 10‐Q of Alcan;                                                                                                                                                                                                                                                                                  |
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| 2.     | Based on my		knowledge, this report does not contain any untrue statement of a		material fact or omit to state a material fact necessary to make the		statements made, in light of the circumstances under which such		statements were made, not misleading with respect to the period covered		by this report;                                      |
|   |                                                                                                                                                                                                                                                                                                                                                 |   |   |
| 3.     | Based on my knowledge, the financial statements, and other financial		information included in this report, fairly present in all material		respects the financial condition, results of operations and cash flows		of the registrant as of, and for, the periods presented in this report;                                                           |
|   |                                                                                                                                                                                                                                                                                                                                                 |   |   |
| 4.     | The registrant's other certifying officer and I are responsible for		establishing and maintaining disclosure controls and procedures (as		defined in Exchange Act Rules 13a‐15(e) and 15d‐15(e)) and internal		control over financial reporting (as defined in Exchange Act Rules		13a-15(f) and 15d-15(f)) for the registrant and have: |
|   |                                                                                                                                                                                                                                                                                                                                                 |   |   |
|   | a)                                                                                                                                                                                                                                                                                                                                                   | Designed such disclosure controls and procedures, or caused such		disclosure controls and procedures to be designed under our supervision,		to ensure that material information relating to the registrant,		including its consolidated subsidiaries, is made known to us by others		within those entities, particularly during the period in which this		report is being prepared; |
|   |                                                                                                                                                                                                                                                                                                                                                 |   |   |
|   | b)                                                                                                                                                                                                                                                                                                                                                   | Designed such internal control over financial reporting, or caused such		internal control over financial reporting to be designed under our		supervision, to provide reasonable assurance regarding the reliability		of financial reporting and the preparation of financial statements for		external purposes in accordance with generally accepted accounting		principles; |
|   |                                                                                                                                                                                                                                                                                                                                                 |   |   |
|   | c)                                                                                                                                                                                                                                                                                                                                                   | Evaluated the		effectiveness of the registrant's disclosure controls and procedures and		presented in this report our conclusions about the effectiveness of the		disclosure controls and procedures, as of the end of the period covered		by this report based on such evaluation; and     d)
Disclosed in this report		any change in the registrant's internal control over financial reporting		that occurred during the registrant's most recent fiscal quarter (the		registrant's fourth fiscal quarter in the case of an annual report) that		has materially affected, or is reasonably likely to materially affect,		the registrant's internal control over financial reporting; and    5.
The registrant's other		certifying officer and I have disclosed, based on our most recent		evaluation of internal control over financial reporting, to the		registrant's auditors and the audit committee of registrant's board of		directors (or persons performing the equivalent function):     a)
All significant		deficiencies and material weaknesses in the design or operation of		internal control over financial reporting which are reasonably likely to		adversely affect the registrant's ability to record, process, summarize		and report financial information; and     b)Any fraud,		whether or not material, that involves management or other employees who		have a significant role in the registrant's internal control over		financial reporting.
 

 

 

 

 

Date: 10May 2006         

                                                                                               /s/ MichaelHanley                                           

                                                                                               Michael Hanley

Executive Vice President and 

Chief Financial Officer |