| -------------------------------------------------------------------------------- Nanophase Technologies Announces First Quarter Revenues
 
 ROMEOVILLE, Ill., Apr 5, 2001 /PRNewswire via COMTEX/ -- Nanophase Technologies
 Corporation (Nasdaq: NANX), a leader in nanomaterials and nanoengineered
 products, today announced revenues for the quarter ending March 31, 2001.
 Initial figures for the quarter show the company realized revenue of
 approximately $1,072,000, representing a 73% increase compared to the first
 quarter of 2000. Revenues from product sales accounted for over 90% of the
 current quarter's revenues and represent an increase of over 100% compared to
 the first quarter of 2000.
 
 "Given the backend-loaded 2001 product delivery scheduling for sunscreen
 materials that occurred in late January, we are satisfied with first quarter
 results and the progress the company made in several areas toward meeting its
 overall 2001 goals," stated Joseph Cross, Nanophase's president and CEO. "We
 initially forecasted a 20% revenue reduction from the fourth quarter of 2000 on
 February 6, which included the recently announced catalyst order, due to the
 unexpected delivery reschedules. We were able to increase first quarter revenue
 above those projections by adding new business and keep sequential quarterly
 revenues relatively constant.
 
 "Despite the widespread economic slowdown, our business and application
 development activity remains robust, as evidenced by our recent announcement of
 a new customer for environmental catalyst. We believe that our demonstrated
 ability to continue generating new business should give our investors, and the
 investment community, increased confidence in the demand for nanotechnology
 products and our ability to deliver customer solutions. We currently forecast
 that second quarter 2001 revenue is expected to be 50% above the first quarter
 and remain comfortable with our 2001 revenue forecast of approximately $10
 million, which would be approximately 2.4 times 2000 revenues, or an increase of
 about 140%."
 
 Nanophase expects to release full financial data for the quarter ending March
 31, 2001, on April 25 followed by its normal quarterly conference call on April
 26 at 10:00 am CST, which will be broadcast on the Internet by Vcall. For
 information on how to "attend" this virtual conference, log in at
 vcall.com . The conference call script will also be posted on the
 Nanophase web site at www.nanophase.com on or about April 27, 2001.
 
 Nanophase Technologies Corporation provides engineered solutions utilizing
 nanocrystalline materials for a variety of industrial product applications.
 Using proprietary technology to produce nanocrystalline materials, the company
 creates products with unique performance attributes. The company's global
 customer base includes Fortune 500 companies. Nanophase trades on the Nasdaq NMS
 under the symbol "NANX." Visit the company's web site at www.nanophase.com .
 
 The words "expect", "anticipates, "plans", "forecasts" and similar expressions
 are intended to identify forward looking statements. Statements contained in
 this news release that are not historical facts are forward looking statements
 that are made pursuant to the Safe Harbor Provisions of the Private Securities
 Litigation Reform Act of 1995. These statements reflect the Company's current
 beliefs, and a number of important factors could cause actual results for future
 periods to differ materially from those expressed in this news release. These
 important factors include, without limitation: a decision of the customer to
 cancel a purchase order or supply agreement; demand for, and acceptance of, the
 Company's nanocrystalline materials; changes in development and distribution
 relationships; the impact of competitive products and technologies; and other
 risks indicated in the Company's current Annual Report on Form 10-K, as filed
 with the Securities and Exchange Commission. Nanophase undertakes no obligation
 to update or revise these forward-looking statements to reflect new events or
 uncertainties.
 
 For Additional Information on Nanophase Technologies by fax at no cost, Dial
 1-800-PRO-INFO, Code NANX
 
 SOURCE Nanophase Technologies Corporation
 
 CONTACT:          Joseph Cross, President, CEO, 630-771-6705, or Dan Bilicki, VP,
 Sales & Mktg., 630-771-6728, or Investor Communications, Nancy Baldwin,
 630-771-6707, all of Nanophase Technologies Corporation, or General, Tad Gage,
 312-640-6745, Analysts, Lisa Fortuna, 312-640-6779, or Media, Tim Grace,
 312-274-2240, all at The Financial Relations Board BSMG Worldwide
 
 URL:              vcall.com
 nanophase.com
 http://www.prnewswire.com
 
 (C) 2001 PR Newswire.  All rights reserved.
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