Chinese specialty chemicals company Chemspec International Ltd.'s initial public offering of 8 million American depository shares priced at $9 per ADS Tuesday, within the expected per-share price range of $7 to $9.

The company will offer 6.33 million ADSs, and some shareholders will offer 1.76 million ADSs, according to an amended prospectus filed with the Securities and Exchange Commission. Each ADS represents 60 ordinary shares, the filing said.

Several analysts said demand from investors appears strong for Chemspec's ADSs, expected to trade on the New York Stock Exchange under the symbol CPC. However, Morningstar panned the deal as "toxic," given growing competition, soft end-markets, and related-party transactions between the company and its founder, among other criticisms.

Chemspec is one of four companies expected to launch initial public offerings this week; the others are Medidata Solutions Inc., Duoyuan Global Water Inc. and Invesco Mortgage Capital Inc. If all are completed, it would be the most active week for IPO issuance in the U.S. since May 2008.

Chemspec plans to use about $45 million of the proceeds to expand its manufacturing capacity and for acquisitions and other general corporate purposes.

The Shanghai-based company bills itself as the largest manufacturer of fluorinated specialty chemicals in China, based on sales. Its chemicals are used in a variety of industries, including electronics and pharmaceuticals.

Established in 1996, Chemspec counts Eli Lilly & Co. (LLY) and Merck KGaA (MKGAF) among its customers. Sales and profit have been growing steadily, although income tax expenses dragged the company's first-quarter profit 38% below a year earlier, when it booked income tax gains.

Chemspec has suffered from the drop in demand for electronic devices, though sales of chemicals for the pharmaceutical and agrochemical industries more than compensated for a slowdown on the electronics side in the first quarter, when sales grew 23% to $29 million.

The company is expanding its manufacturing capacity, which is expected to double from its first-quarter level by the end of this year and nearly quadruple through the end of 2011.

The company's outlook is upbeat; it believes demand for specialty chemicals has been recovering and will grow later this year, particularly closer to the holiday season.

Underwriters Credit Suisse Group (CS), Citigroup Inc. (C), Oppenheimer & Co. and Piper Jaffray Cos. (PJC) have an option to purchase up to 1.22 million more ADSs to cover overallotments.

-By Kathy Shwiff, Dow Jones Newswires; 201-938-5975; Kathy.Shwiff@dowjones.com

(Lynn Cowan contributed to this report.)