Lyondell Chemical (LYO) 10-Q 2007 Q3 Quarterly report

Exhibit 4.15(e)

FOURTH SUPPLEMENTAL INDENTURE

dated as of July 5, 2007

among

LYONDELL CHEMICAL COMPANY,

as Company

LYONDELL EUROPE HOLDINGS INC.,

as Subsidiary Guarantor

and

THE BANK OF NEW YORK,

as Trustee

_________________________

10½% Senior Secured Notes due 2013

THIS FOURTH SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), entered into as of July 5, 2007 among LYONDELL CHEMICAL COMPANY, a Delaware

corporation (the “Company”) LYONDELL EUROPE HOLDINGS INC., a Delaware corporation (the “Undersigned”) and THE BANK OF NEW YORK, as trustee (the “Trustee”).

RECITALS

WHEREAS, the Company, the Subsidiary Guarantors party thereto and the Trustee entered into the Indenture, dated as of May 20, 2003 (as may be amended, supplemented or

otherwise modified, the “Indenture”), relating to the Company’s 10½% Senior Secured Notes due 2013 (the “Notes”);

WHEREAS, as a condition to the Trustee entering into the Indenture and the purchase of the Notes by the Holders, the Company agreed, subject to certain exceptions, pursuant

to Section 4.22 of the Indenture to cause any Restricted Subsidiary that has guaranteed or secured Indebtedness of the Company or any of its Restricted Subsidiaries to provide

Subsidiary Guarantees.

AGREEMENT

NOW, THEREFORE, in consideration of the premises and mutual covenants herein contained and intending to be legally bound, the parti es hereto hereby agree as follows:

Section 1.  Capitalized terms used herein and not otherwise defined herein are used as defined in the Indenture.

Section 2.  The Undersigned, by its execution of this Supplemental Indenture, agrees to be a Subsidiary Guarantor under the Indenture and to be bound by the terms of the

Indenture applicable to Subsidiary Guarantors, including, but not limited to, Article 13 thereof.

Section 3.  This Supplemental Indenture shall be governed by and construed in accordance with the internal laws of the State of New York.

Section 4.  This Supplemental Indenture may be signed in various counterparts which together shall constitute one and the same instrument.

Section 5.  This Supplemental Indenture is an amendment supplemental to the Indenture and said Indenture and this Supplemental Indenture shall henceforth be read together.

IN WITNESS WHEREOF, the parties have duly executed and delivered this Supplemental Indenture or have caused this Supplemental Indenture to be duly executed on their

respective behalf by their respective officers thereunto duly authorized, as of the day and year first above written.

LYONDELL CHEMICAL COMPANY

By: /s/ Karen A. Twitchell                                                              

 Karen A. Twitchell

        Vice President and Treasurer

LYONDELL EUROPE HOLDINGS INC.

By: /s/ Francis P. McGrail                                                              

        Francis P. McGrail

        President and Treasurer

THE BANK OF NEW YORK, as Trustee

By: /s/ Robert A. Massimillo                                                              

Name:  Robert A. Massimillo

Title:    Vice President