Exhibit 23.1
CONSENT OF INDEPENDENT AUDITORS
We consent to the incorporation by reference, in the following registration statements:
| 1. | Registration Statement (Form S-8 Nos. 333-172019) pertaining to the 2011 Ashland Inc. Incentive Plan, |
| 2. | Registration Statements (Forms S-8 Nos. 333-54766-99 and 333-127348) pertaining to the Amended and Restated Ashland Inc. Incentive Plan, |
| 3. | Registration Statement (Form S-8 No. 333-131792) pertaining to the 2006 Ashland Inc. Incentive Plan, |
| 4. | Registration Statement (Form S-8 No. 33-62091-99) pertaining to the Ashland Inc. Deferred Compensation Plan, |
| 5. | Registration Statement (Form S-8 No. 33-52125-99) pertaining to the Ashland Inc. Deferred Compensation Plan for Non-Employee Directors, |
| 6. | Registration Statement (Form S-8 No. 333-122269-99) pertaining to the Ashland Inc. Deferred Compensation Plan for Employees (2005), |
| 7. | Registration Statement (Form S-8 No. 333-122270-99) pertaining to the Ashland Inc. Deferred Compensation Plan for Non-Employee Directors (2005), |
| 8. | Registration Statements (Forms S-8 Nos. 33-32612-99 and 333-157040) pertaining to the Ashland Inc. Employee Savings Plan, |
| 9. | Registration Statement (Form S-8 No. 33-49907-99) pertaining to the Ashland Inc. Leveraged Employee Stock Ownership Plan, |
| 10. | Registration Statement (Form S-8 No. 333-155386) pertaining to the Hercules Incorporated Amended and Restated Long Term Incentive Compensation Plan and the Hercules Incorporated Omnibus Equity Compensation Plan for Non-Employee Directors, and |
| 11. | Registration Statement (Form S-8 No. 333-155396) pertaining to the Amended and Restated Ashland Inc. Union Employee Savings Plan; |
of our report dated March 25, 2011, with respect to the consolidated financial statements of ISP Chemco LLC, included in this Current Report on Form 8-K/A of Ashland Inc.
/s/ Ernst&Young LLP
New York, New York
October 28, 2011