Exhibit 23.5 CONSENT OF EXPERT We consent to the use of our firm's name, and the references to our reports, in the Registration Statement on Form S-4 of Huntsman International LLC, and any amendments thereto, filed with the Securities and Exchange Commission for the registration of the 10 1/8% Senior Subordinated Notes due 2009. Date: April 6, 2001 /s/ MICHAEL J. KRATOCHWILL ----------------------------------------------- Chem Systems