UPDATE 2-Medical-services provider Chem Rx files for bankruptcy

* Five affiliates also part of Chapter 11 petition

* Lists assets of $169.7 mln, debt of $178.3 mln

* AmerisourceBergen named largest unsecured creditor (Recasts, adds details)

May 11 (Reuters) - Medical-services provider Chem Rx Corp CHRX.PK filed for Chapter 11 protection on Tuesday, a day after the company's lenders filed an action in a New York state court to prohibit its use of cash that was subject to the lenders' liens.

Chem Rx has been in default under certain loans since the beginning of 2009 and has operated without an effective forbearance agreement since the end of June, Chief Financial Officer Gary Jacobs said in court papers.

Jacobs said talks with its lenders over a viable restructuring had failed and it would be unable to continue operations if the use of its cash was enjoined by the court.

In its Chapter 11 petition, which also included five affiliates, Chem Rx listed assets of $169.7 million and total debt of $178.3 million.

Drug wholesaler AmerisourceBergen Corp (ABC.N) was listed as the largest unsecured creditor with a claim of about $9.56 million.

Jacobs said although Chem Rx's businesses remained strong, the company was too highly leveraged and lacked adequate liquidity to sustain operations over the long term without a restructuring.

Long Beach, New York-based Chem Rx is the third-largest long-term-care pharmacy in the United States, according to the company's website.

The case is In re: Chem Rx Corp, U.S. Bankruptcy Court, District of Delaware, No:10-11567. (Reporting by Santosh Nadgir in Bangalore; Editing by Vinu Pilakkott)