News Release Details

TIANJIN, China and BOSTON, MA, USA, June 30 /PRNewswire-FirstCall/ -- Cabot Corporation (NYSE: CBT) announced today it will build a new specialty carbon black unit at its plant in the Tianjin Economic and Technological Development Area (TEDA). Cabot Performance Products (Tianjin) Company, Ltd, a joint venture with Shanghai Coking Chemical Company will invest nearly US$30 million to build the special blacks unit that will have an annual nameplate capacity of approximately 20,000 metric tons. The unit will use the most advanced energy recovery and environmental technologies available and is scheduled to begin production in the second half of 2006.

At the official press conference today in Tianjin, Sean Keohane, vice president and general manager, Performance Products Business Group at Cabot said, "With the rapidly growing market in China and the Asia Pacific region, local manufacturing facilities that produce high quality performance products are in great demand. This joint venture is a continuation of our long-term commitment to China and to our partners, further strengthening Cabot's position as a global leader in the production of carbon black."

"We appreciate the support of the local government officials and Shanghai Coking in developing this carbon black facility in Tianjin," said Mr. Xinsheng Zhang, vice president of Cabot Corporation and president of Cabot China Ltd. "We are looking forward to adding the special black component to our Tianjin carbon black plant. When completed, the Tianjin facility will constitute one of the largest carbon black production facilities in the world."

Mr. Hu Gongming, chairman of Shanghai Coking, said, "The cooperation between Shanghai Coking and Cabot has been very successful. We are working together to utilize the energy in carbon black production, contribute to local environmental protection, and create added value to our businesses. We look forward to expanding our production base in TEDA."

Cabot Corporation is a global specialty chemicals and materials company headquartered in Boston, Massachusetts, USA. Cabot's major products are carbon black, fumed silica, inkjet colorants, capacitor materials, and cesium formate drilling fluids. The website address is: http://www.cabot-corp.com.

Founded in 1958, Shanghai Coking Chemical Co., Ltd. is one of the largest manufacturers of coking and methanol in China. The website address is: http://www.shcoking.com.cn

Contact:
Ethel Shepard
Corporate Affairs Manager
617-342-6254
ethel_shepard@cabot-corp.com

Susannah Robinson
Director, Investor Relations
617-342-6129
susannah_robinson@cabot-corp.com