Disclaimer

IMPORTANT NOTICE

NOT FOR DISTRIBUTION TO ANY PERSON LOCATED OR RESIDENT IN ANY JURISDICTION IN WHICH SUCH DISTRIBUTION IS UNLAWFUL.

IMPORTANT:  You must read the following disclaimer before continuing.  The following disclaimer applies to the Offer to Purchase and you are therefore required to read this disclaimer page carefully before accessing, reading or making any other use of the Offer to Purchase.  By accessing, reading or making any other use of the Offer to Purchase, you agree (in addition to giving the representations below) to be bound by the following terms and conditions, including any modifications to them from time to time, each time you receive any information from Celanese US Holdings LLC, a Delaware limited liability company (the “Company,” “we,” “us” and the “Offeror”) and J.P. Morgan Securities LLC and J.P. Morgan Securities plc (the “Lead Dealer Managers” and, together with BofA Securities, Inc., HSBC Securities (USA) Inc. and any additional dealer managers appointed by the Offeror, the “Dealer Managers”) and/or D.F. King & Co., Inc. (the “Tender and Information Agent”), as a result of such access.  Capitalized terms used but not otherwise defined in this disclaimer shall have the meaning given to them in the Offer to Purchase.

THE OFFER TO PURCHASE MAY NOT BE FORWARDED TO ANY OTHER PERSON AND MAY NOT BE REPRODUCED IN ANY MANNER WHATSOEVER.  ANY FORWARDING, DISTRIBUTION OR REPRODUCTION OF THE OFFER TO PURCHASE IN WHOLE OR IN PART IS UNAUTHORIZED.  FAILURE TO COMPLY WITH THESE REQUIREMENTS MAY RESULT IN A VIOLATION OF APPLICABLE LAWS.

Confirmation of your representation:  In order to be eligible to view the Offer to Purchase or make an investment decision with respect to the Tender Offers (as defined below), you must be able to participate lawfully in one or more of the separate invitations by the Offeror to Holders of Notes (as defined below) to tender their Notes for purchase for cash (the “Tender Offers”) on the terms and subject to the conditions set out in the Offer to Purchase, including the offer and distribution restrictions set out therein (the “Offer and Distribution Restrictions”).  The Offer to Purchase was made available to you at your request and by accessing the Offer to Purchase you shall be deemed to have represented to the Offeror, the Dealer Managers and the Tender and Information Agent that:

(i)      you are a Holder or a beneficial owner of 4.777% Senior Notes due 2026 (ISIN: XS2497520705) issued by the Company (the “EUR Notes”) or 6.165% Senior Notes due 2027 (CUSIP: 15089QAM6 / ISIN: US15089QAM69) issued by the Company (the “USD Notes”);

(ii)    you are not a EUR Sanctions Restricted Person, with respect to the Tender Offer for EUR Notes, or a USD Sanctions Restricted Person, with respect to the Tender Offer for USD Notes , and you are a person to whom it is lawful to send (or make available) the attached Offer to Purchase or to make an invitation pursuant to the Tender Offers under all applicable laws, including the Offer and Distribution Restrictions; and

(iii)  you consent to delivery of the Offer to Purchase to you by electronic transmission.

The Offer to Purchase has been made available to you in an electronic form.  You are reminded that documents transmitted via this medium may be altered or changed during the process of transmission and consequently none of the Offeror, the Dealer Managers, the Tender and Information Agent or any person who controls, or any director, officer, employee, agent or affiliate of, any such person accepts any liability or responsibility whatsoever in respect of any difference between the Offer to Purchase distributed to you in electronic format and the hard copy version available to you on request from the Dealer Managers or the Tender and Information Agent.

The Offer to Purchase has been made available to you on the basis that you may not, nor are you authorized to, deliver or make available the Offer to Purchase to any other person or to reproduce the Offer to Purchase in any manner whatsoever.

Any materials relating to the Tender Offers do not constitute, and may not be used in connection with, any form of offer or solicitation in any place where such offers or solicitations are not permitted by law.  In those jurisdictions where securities or other laws require any Tender Offers to be made by a licensed broker or dealer and any of the Dealer Managers or, where the context so requires, any of their respective affiliates is such a licensed broker or dealer in that jurisdiction, the Tender Offers shall be deemed to be made on behalf of the Offeror by such Dealer Manager or affiliate (as the case may be) in such jurisdiction (but only to any Holder that is a Relevant Holder (as defined in the Offer to Purchase)).

Nothing in this electronic transmission constitutes an offer to buy or the solicitation of an offer to sell securities in any jurisdiction in which such offer or solicitation would be unlawful.

The distribution of the Offer to Purchase in certain jurisdictions may be restricted by law.  Persons into whose possession the Offer to Purchase comes are required by the Offeror, the Dealer Managers and the Tender and Information Agent to inform themselves about, and to observe, any such restrictions.

You are responsible for protecting against viruses and other destructive items.  Your use of this electronic communication is at your own risk.  It is your responsibility to take precautions to ensure that this electronic communication is free from viruses and other items of a destructive nature.