NEW YORK (

TheStreet

) -- The ex-dividend date for

Sigma-Aldrich Corporation

(Nasdaq:

SIAL

) is tomorrow, August 30, 2011. Owners of shares as of market close today will be eligible for a dividend of 18 cents per share. At a price of $62.44 as of 9:30 a.m. ET, the dividend yield is 1.2%.

The average volume for Sigma-Aldrich has been 797,900 shares per day over the past 30 days. Sigma-Aldrich has a market cap of $7.3 billion and is part of the

basic materials

sector and

chemicals

industry. Shares are down 7.3% year to date as of the close of trading on Friday.

Sigma-Aldrich Corporation, together with its subsidiaries, develops, manufactures, purchases, and distributes a range of chemicals, biochemicals, and equipment worldwide. The company has a P/E ratio of 17.7, equal to the average chemicals industry P/E ratio and equal to the S&P 500 P/E ratio of 17.7.

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TheStreet Ratings rates Sigma-Aldrich as a

buy

. The company's strengths can be seen in multiple areas, such as its growth in earnings per share, revenue growth, largely solid financial position with reasonable debt levels by most measures, increase in net income and solid stock price performance. We feel these strengths outweigh the fact that the company has had somewhat disappointing return on equity. You can view the full

Sigma-Aldrich Ratings Report

.

See our

dividend calendar

or

top-yielding stocks list

.

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