EXHIBIT 5.1
                                                           [JENNER & BLOCK LOGO]

October 27, 2004                        Jenner & Block LLP        Chicago
                                        One IBM Plaza             Dallas
                                        Chicago, IL 60611         Washington, DC
                                        Tel  312-222-9350
                                        www.jenner.com


Viskase Companies, Inc.
625 Willowbrook Centre Parkway
Willowbrook, Illinois 60527

Ladies and Gentlemen:

         We have acted as counsel to Viskase Companies, Inc., a Delaware
corporation (the "Company"), in connection with the Registration Statement on
Form S-4 (the "Registration Statement") filed by the Company with the Securities
and Exchange Commission (the "Commission") under the Securities Act of 1933, as
amended, relating to the issuance by the Company of $90,000,000 aggregate
principal amount of 11 1/2% Senior Secured Notes due 2011 (the "Exchange
Notes"). The Exchange Notes will be issued under an indenture dated as of June
29, 2004 (the "Indenture") among the Company and LaSalle Bank National
Association, as Trustee (the "Trustee"). The Exchange Notes will be offered by
the Company in exchange for all outstanding $90,000,000 11 1/2% Senior Secured
Notes due 2011 of the Company (the "Outstanding Notes"), issued under the same
Indenture.

         We have examined the Registration Statement, the Indenture, and the
form of the Exchange Notes, which is set forth as an exhibit to the Registration
Statement. We also have examined the originals, or duplicates or certified or
conformed copies, of such records, agreements, instruments and other documents
and have made such other and further investigations as we have deemed relevant
and necessary in connection with the opinions expressed herein. As to questions
of fact material to this opinion, we have relied upon certificates of officers
and representatives of the Company.

         In rendering the opinion that follows, we have assumed: (i) the
genuineness of all signatures; (ii) the legal capacity of natural persons; (iii)
the authenticity of all documents submitted to us as originals; (iv) the
conformity to the original documents of all documents submitted to us as
duplicates or certified or conformed copies; and (v) the authenticity of the
originals of such latter documents. We have also assumed that the Indenture is a
valid and legally binding obligation of the Trustee.

         Based upon the foregoing, and subject to the qualifications and
limitations stated herein, we are of the opinion that when the Exchange Notes
have been duly executed, authenticated, issued and delivered in accordance with
the provisions of the Indenture in exchange for the



Outstanding Notes, the Exchange Notes will constitute valid and legally binding
obligations of the Company.

         Our opinions set forth above are subject to the effects of: (1)
bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and
other similar laws relating to or affecting creditors' rights generally; (2)
general equitable principles (whether considered in a proceeding in equity or at
law); (3) the implied covenant of good faith and fair dealing; and (4) public
policy.

         We do not express any opinion herein concerning any law other than the
General Corporation Law of the State of Delaware, the law of the State of
Illinois and the Federal law of the United States.

         We hereby consent to the filing of this letter as Exhibit 5.1 to the
Registration Statement and the use of our name under the caption "Legal Matters"
in the Prospectus included in the Registration Statement.



                                        Very truly yours,

                                        /s/  Jenner & Block LLP

                                        Jenner & Block LLP



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