* Adj Q1 profit 84 cts/shr vs. Street 79 cts/shr
* Revenue up 10 percent
NEW YORK, April 22 (Reuters) - Biotechnology company Sigma-Aldrich Corp SIAL.O posted better-than-expected first-quarter profit as volumes improved and higher energy costs were passed on to customers.
The company reported net income of $100 million, or 81 cents per share, compared with $84 million, or 68 cents per share, in the year-ago period.
Excluding restructuring charges, the company earned 84 cents per share.
By that measure, analysts expected earnings of 79 cents per share, according to Thomson Reuters I/B/E/S.
Revenue at the St. Louis, Missouri-company rose 10 percent to $572 million. Analysts expected $570.6 million in revenue.
The company raised its 2010 earnings forecast by 5 cents to a range of $3.05 to $3.20 per share.
Shares fell 10 cents to $56.80 in premarket trading. The stock has traded between $38.79 and $56.91 in the past 52 weeks.
Reporting by Ernest Scheyder, editing by Dave Zimmerman