NEW YORK (

TheStreet

) -- The ex-dividend date for

Sigma-Aldrich Corporation

(Nasdaq:

SIAL

) is tomorrow, May 30, 2012. Owners of shares as of market close today will be eligible for a dividend of 20 cents per share. At a price of $71.94 as of 9:30 a.m. ET, the dividend yield is 1.1%.

The average volume for Sigma-Aldrich has been 561,700 shares per day over the past 30 days. Sigma-Aldrich has a market cap of $8.6 billion and is part of the

basic materials

sector and

chemicals

industry. Shares are up 13.8% year to date as of the close of trading on Friday.

Sigma-Aldrich Corporation, a life science and high technology company, develops, manufactures, purchases, and distributes various chemicals, biochemicals, and equipment worldwide. The company has a P/E ratio of 19.2, equal to the average chemicals industry P/E ratio and above 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 revenue growth, largely solid financial position with reasonable debt levels by most measures, expanding profit margins, notable return on equity and solid stock price performance. We feel these strengths outweigh the fact that the company shows weak operating cash flow. You can view the full

Sigma-Aldrich Ratings Report

.

See our

dividend calendar

or

top-yielding stocks list

.

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