UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 5, 2011

ARCH CHEMICALS, INC.

(Exact name of registrant as specified in its charter)

Virginia	1-14601	06-1526315
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)
501 Merritt 7, Norwalk, CT		06851
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (203) 229-2900

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

INFORMATION TO BE INCLUDED IN THE REPORT

ITEM 2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On August 5, 2011, Arch Chemicals, Inc. (the “Company”) released the results of operations and financial condition for the three and six months ended June 30, 2011. Attached as Exhibit 99, and incorporated herein by reference, is a copy of the Company’s earnings press release dated August 5, 2011.

Included in Exhibit 99 is a reference to the Company’s second quarter 2011 income and earnings per share from continuing operations which, as noted in such Exhibit, excludes a charge related to relocation costs. The Company believes that this non-GAAP financial measure provides a comparison of results to prior year and to the Company’s earnings guidance provided on May 4, 2011, and therefore is useful to the investment community. A reconciliation of this non-GAAP financial measure to what the Company believes is the most directly comparable U.S. GAAP financial measure is provided in such Exhibit.

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ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS

(d) Exhibits

99. Press Release, dated August 5, 2011.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: August 5, 2011

ARCH CHEMICALS, INC.
By:	/s/ Steven C. Giuliano
Name:	Steven C. Giuliano
Title:	Senior Vice President and Chief Financial Officer

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Exhibit Index

Exhibit	Description
99.	Press Release, dated August 5, 2011.

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