HOUSTON (April 6, 2006) -- TPC Group, Inc. (the Company) (OTC: TXPI.PK - News) today announced that TPC Group LP has entered into a purchase and sale agreement for the purchase of the assets of the United States butadiene and related MTBE operations of Huntsman Corporation, which includes a manufacturing facility located in Port Neches, Texas. The purchase price is $269 million, subject to customary adjustments.

The two companies signed a letter of intent in February 2006. The transaction is expected to close in mid-2006.

"We are pleased with the execution of the purchase and sale agreement," said Charlie Shaver, president and CEO of TPC Group, Inc. "This is another milestone in the company's long-term business strategy to add value within one of our core businesses, while maintaining a focus on the supplier and customer base we currently serve."

The Port Neches manufacturing facility has a capacity of approximately 900 million pounds of butadiene per year. The addition of these assets creates a business with more than $1.7 billion in revenues on a pro forma basis based on calendar year 2005 results.

Headquartered in Houston, Texas, TPC Group LP is a premier chemical company with more than $1 billion in annual sales. The Company provides quality C4 chemical products and services to both local and global industry companies. The Company has manufacturing facilities in the industrial corridor adjacent to the Houston Ship Channel and operates product terminals in Baytown, Texas and Lake Charles, Louisiana. For more information, visit the Company's web site at www.txpetrochem.com.

Cautionary Information Regarding Forward-Looking Statements

Certain oral and written information that the Company may make publicly available from time to time may constitute forward-looking statements. Such statements may relate to future operating results, existing and expected competition, financing and refinancing sources and availability, and plans related to acquisitions or other future expansion activities and capital expenditures. Forward-looking statements involve a number of risks and uncertainties that may significantly affect the Company's liquidity and results in the future and, accordingly, actual results may differ materially from those expressed in any forward-looking statements. Such risks and uncertainties include, but are not limited to, those related to effects of competition, leverage and debt service, financing and refinancing efforts, litigation and governmental investigations, environmental laws and regulations, general economic conditions and changes in laws or regulations.

CONTACT:
Ruth Dreessen
Chief Financial Officer
PHONE: 713.627.7474

Christopher Artzer
General Counsel
PHONE: 713.627.7474

McCall Keyser
Vice President, Finance and Treasury
PHONE: 713.627.7474