Cabot Corporation to Present at Chemical Heritage Foundation Conference

June 17, 2005
                     Change to Previously Announced Time

BOSTON, June 23 /PRNewswire-FirstCall/ -- Cabot Corporation (NYSE: CBT) announced today that Kennett F. Burnes, Chairman and CEO, will address Chemical Heritage Foundation's 2nd Annual Chemical Industry Conference in Philadelphia on Tuesday, June 28, 2005 at 10:00am (ET). This is a change to the previously announced time.

(Logo: http://www.newscom.com/cgi-bin/prnh/20000323/CABOTLOGO )

The presentation will be webcast live on Cabot's website at http://investor.cabot-corp.com.

If you are unable to participate during the live webcast, the event will be archived on the Company's website at http://investor.cabot-corp.com. A replay will be available for 30 days.

Cabot Corporation is a global specialty chemicals and materials company headquartered in Boston, MA. Cabot's major products are carbon black, fumed silica, inkjet colorants, capacitor materials, and cesium formate drilling fluids.

    Contact:
     Susannah Robinson
     Director, Investor Relations
     (617) 342-6129
SOURCE  Cabot Corporation
    -0-                             06/23/2005
    /CONTACT: Susannah Robinson, Director, Investor Relations of Cabot
Corporation, +1-617-342-6129/
    /Photo:  NewsCom:  http://www.newscom.com/cgi-bin/prnh/20000323/CABOTLOGO
                       AP Archive: http://photoarchive.ap.org
                       PRN Photo Desk photodesk@prnewswire.com /
    /Web site:  http://www.cabot-corp.com/
    (CBT)

CO:  Cabot Corporation; Chemical Heritage Foundation
ST:  Massachusetts, Pennsylvania
IN:  CHM
SU:  TDS MAV

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