Union Carbide 10-Q 2006 Q2 Quarterly report

EXHIBIT 23

Analysis, Research & Planning Corporation’s Consent

Union Carbide Corporation:

Analysis, Research & Planning Corporation (“ARPC”) hereby consents to the use of ARPC’s name and the reference to ARPC’s reports dated January 9, 2003, January 26, 2004, January 26, 2005 and January 3, 2006 in this Quarterly Report on Form 10-Q of Union Carbide Corporation for the quarter ended June 30, 2006.

/s/ B. THOMAS FLORENCE

B. Thomas Florence

President

Analysis, Research & Planning Corporation

July 28, 2006

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