EnerTeck [LOGO]
EnerTeck Chemical Corp.

10701 Corporate Dr. #150
Stafford, TX 77477

phone: 281-240-1787
  Fax: 281-240-1828

  www.enerteck.net


EXHIBIT 99.1
Leon van Kraayenburg Resignation Letter

                                INTER OFFICE MEMO



To: Dwaine Reese                                         Date: February 10, 2005
    CEO & Director

From: Leon van Kraayenburg

CC: Parry Ketchmark, Gary Aman & Jack Cowles
    Directors        Director    Director

Subject: Compensation:

Dear Dwaine:

The writing hereof serves to address the non payment of my compensation pursuant
to my employment agreement, which is now in arrears to the extent of $19,000.00.
I have continued to fulfill my  responsibilities at a great imposition to me and
my family.  Each month I incur out of pocket expenses of roughly  $1,100.00,  in
fuel costs, wear and tear & maintenance on my vehicle,  tolls and lunch expenses
in order to complete the tasks at hand applicable to my job. In addition to this
I have had to borrow over $14,000 form the bank  collateralized  with my home in
order to meet our personal financial obligations.  The cost of this loan is @ 9%
interest and thus I am incurring additional interest expenses of $105 per month.

Furthermore,  as you are aware my wife is undergoing medical treatment, and as a
result of non payment of salaries,  our medical insurance is at jeopardy, if not
already  cancelled,  which could  substantially  impact our  personal  financial
situation.

There has been no effort to pay the outstanding  salaries. In fact all too often
vendors have been placed as a priority over salaries and wages.  I would like to
mention as a reminder that salaries,  wages and commissions are a first priority
expense of any corporation pursuant to both State and Federal laws.

In  visiting  our  auditors  yesterday,  they  have  demanded  that the year end
retainer and all past invoices be paid in full prior to them proceeding with the
year end audit. I can no longer  continue in this fashion.  I cannot approve any
payments to vendors that take precedent over salaries, wages and commissions.  I
am left no  alternative  and am  therefore  unable to  continue  completing  the
yearend  work,  nor will I sign off on the  year  end  financials  until my past
salary  is paid in full.  I can  simply  no  longer  incur  these  out of pocket
expenses with no resolution in sight.




                                INTER OFFICE MEMO

Page -2-
Subject: Compensation:  Continued


In order to comply with the Texas Labor Code and the District  Attorneys office,
the  writing  hereof  also serves to notify you that this letter is a demand for
payment for my salary that is in  arrears.  Once this salary is paid in full,  I
will resume completing the year end financials.

I have done everything I can to assist during these difficult  times, but can no
longer bear the  financial  burden that is placed on me and my family,  yet I am
expected to come to the office and continue working under these conditions.

If my wages are not paid in full by February 24, 2005, I will have no option but
to seek relief through the channels available to me under the Texas Labor Code.

At this time I resign as a Director of both EnerTeck Chemical Corp. and EnerTeck
Corporation,  parent to EnerTeck Chemical Corp. I have been pleased to have been
able to serve on the Board,  however in light of current  conditions do not wish
to be part of any approval  process in which the  corporation is directed to pay
expenses to vendors prior to the payment of salaries, wages and commissions.

I  appreciate  your  understanding  in advance  and look  forward to resuming my
responsibilities  once my salary is current. In the mean time I will be using up
my vacation that I have earned.

Sincerely,



Leon van Kraayenburg
Executive Vice President & CFO