Rule 424(b)(3)
File No. 33-38032
NALCO CHEMICAL COMPANY

COMMON STOCK ACQUIRED UNDER THE
NALCO CHEMICAL COMPANY
STOCK OPTION PLAN FOR NON-EMPLOYEE DIRECTORS
APPENDIX DATED MAY 8, 1995
TO 
PROSPECTUS DATED NOVEMBER 30 1990

This Appendix updates certain information in the Prospectus dated November 30,
1990 (the "Prospectus") relating to shares of Common stock which may be
offered by the stockholders listed herein under the caption "Selling 
Stockholders" or by their transferees (or by their donees or pledgees).  The 
Company will furnish without charge to participants additional copies of the 
Prospectus upon request.


SELLING STOCKHOLDERS

The following table sets forth the name and position within the Company for 
the last three years of each Selling Stockholder, the number of shares of 
Common Stock of the Company beneficially owned by him on the date of this 
Prospectus and, the number of shares offered by the Prospectus.


Name of Director      Shares OwnedBeneficially (1)      Shares Offered by 
                                                        This Prospectus (1)(2)
                                                     

J. L. Ballesteros             4,000                         4,000
H. G. Bernthal               24,400                        24,000
H. Corless                   26,000(3)                     24,000
H. M. Dean                   25,000                        24,000
J. P. Frazee, Jr.            26,634                        24,000
A. L. Kelly                  19,075                        16,000
F. A. Krehbiel               28,000                        24,000
W. A. Pogue                  24,905(3)                     24,000
J. J. Shea                   13,000                        12,000

1.  Includes shares which may be acquired by exercise of stock options pursuant 
to the Plan.

2.  This does not constitute a commitment to sell all of the stated 
number of shares.  
The amount of shares offered shall be determined from time to time by each 
selling stockholder in his sole discretion.

3.  Includes beneficial/ownership of shares held indirectly by wife.


Additional selling stockholders will be identified by a subsequent appendix.

One or more of the Selling Stockholders may from time to time make gifts of
any or all of his shares or pledge any or all of his shares as collateral 
for loans.  In the event of such
gift or of a default under any such loan, the donee may elect to sell donated 
shares or the lender may elect to sell shares held as collateral by means of 
the Prospectus as supplemented.