Registration Rights Agreement

REGISTRATION RIGHTS AGREEMENT

REGISTRATION RIGHTS AGREEMENT (this " Agreement "), dated as of July 31, 2006, by and among Itronics Inc., a Texas corporation with its headquarters located at 6490 South McCarran Boulevard, Building C, Suite 23, Reno, NV 89509 (the " Company "), and each of the undersigned (together with their respective affiliates and any assignee or transferee of all of their respective rights hereunder, the " Initial Investors ").

WHEREAS:

A. In connection with the Securities Purchase Agreement by and among the parties hereto of even date herewith (the "Securities Purchase Agreement"), the Company has agreed, upon the terms and subject to the conditions contained therein, to issue and sell to the Initial Investors secured convertible notes in the aggregate principal amount of up to Five Hundred Thousand Dollars ($500,000) (the "Notes") that are convertible into shares of the Company92s common stock (the "Common Stock"), upon the terms and subject to the limitations and conditions set forth in such Notes and warrants (the "Warrants") to acquire an aggregate of 20,000,000 shares of Common Stock, upon the terms and conditions and subject to the limitations and conditions set forth in the Warrants; and

B. To induce the Initial Investors to execute and deliver the Securities Purchase Agreement, the Company has agreed to provide certain registration rights under the Securities Act of 1933, as amended, and the rules and regulations thereunder, or any similar successor statute (collectively, the " 1933 Act "), and applicable state securities laws;

NOW, THEREFORE, in consideration of the premises and the mutual covenants contained herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Company and each of the Initial Investors hereby agree as follows:

1. DEFINITIONS.

a. As used in this Agreement, the following terms shall have the following meanings:

(i) " Investors " means the Initial Investors and any transferee or assignee who agrees to become bound by the provisions of this Agreement in accordance with Section 9 hereof.

(ii) " register ," " registered ," and " registration " refer to a registration effected by preparing and filing a Registration Statement or Statements in compliance with the 1933 Act and pursuant to Rule 415 under the 1933 Act or any successor rule providing for offering securities on a continuous basis (" Rule 415 "), and the declaration or ordering of effectiveness of such Registration Statement by the United States Securities and Exchange Commission (the " SEC ").

(iii) " Registrable Securities " means the Conversion Shares issued or issuable upon conversion or otherwise pursuant to the Notes including, without limitation, Damages Shares (as defined in the Notes) issued or issuable pursuant to the Notes, shares






of Common Stock issued or issuable in payment of the Standard Liquidated Damages Amount (as defined in the Securities Purchase Agreement), shares issued or issuable in respect of interest or in redemption of the Notes in accordance with the terms thereof) and any shares of capital stock issued or issuable as a dividend on or in exchange for or otherwise with respect to any of the foregoing.

(iv) " Registration Statement " means a registration statement of the Company under the 1933 Act.

b. Capitalized terms used herein and not otherwise defined herein shall have the respective meanings set forth in the Securities Purchase Agreement or the Convertible Note.

2. REGISTRATION.

a. Mandatory Registration . The Company shall prepare, and, on or prior to forty-five (45) days from the date of Closing (as defined in the Securities Purchase Agreement) (the " Filing Date "), file with the SEC a Registration Statement on Form S-3 (or, if Form S-3 is not then available, on such form of Registration Statement as is then available to effect a registration of the Registrable Securities, subject to the consent of the Initial Investors, which consent will not be unreasonably withheld) covering the resale of the Registrable Securities underlying the Notes and Warrants issued or issuable pursuant to the Securities Purchase Agreement, which Registration Statement, to the extent allowable under the 1933 Act and the rules and regulations promulgated thereunder (including Rule 416), shall state that such Registration Statement also covers such indeterminate number of additional shares of Common Stock as may become issuable upon conversion of or otherwise pursuant to the Notes and exercise of the Warrants to prevent dilution resulting from stock splits, stock dividends or similar transactions. The number of shares of Common Stock initially included in such Registration Statement shall be no less than an amount equal to the sum of the number of Conversion Shares that are then issuable upon conversion of the Notes (based on the Variable Conversion Price as would then be in effect and assuming the Variable Conversion Price is the Conversion Price at such time), without regard to any limitation on the Investor92s ability to convert the Notes. The Company acknowledges that the number of shares initially included in the Registration Statement represents a good faith estimate of the maximum number of shares issuable upon conversion of the Notes.

b. Underwritten Offering . If any offering pursuant to a Registration Statement pursuant to Section 2(a) hereof involves an underwritten offering, the Investors who hold a majority in interest of the Registrable Securities subject to such underwritten offering, with the consent of a majority-in-interest of the Initial Investors, shall have the right to select one legal counsel and an investment banker or bankers and manager or managers to administer the offering, which investment banker or bankers or manager or managers shall be reasonably satisfactory to the Company.

c. Payments by the Company . The Company shall use its best efforts to obtain effectiveness of the Registration Statement as soon as practicable. If the Registration Statement(s) covering the Registrable Securities required to be filed by the Company

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pursuant to Section 2(a) hereof is not filed by the Filing Date or declared effective by the SEC on or prior to one hundred and twenty (120) days from the date of Closing, except that the period shall extend to 180 days in the event that the SEC92s comments cause such delay (as defined in the Securities Purchase Agreement), or after the Registration Statement has been declared effective by the SEC, sales of all of the Registrable Securities cannot be made pursuant to the Registration Statement, or the Common Stock is not listed or included for quotation on the Nasdaq National Market (" Nasdaq "), the Nasdaq SmallCap Market (" Nasdaq SmallCap "), the New York Stock Exchange (the " NYSE ") or the American Stock Exchange (the " AMEX ") after being so listed or included for quotation, or the Common Stock ceases to be traded on the Over-the-Counter Bulletin Board (the "OTCBB" ) or any equivalent replacement exchange prior to being listed or included for quotation on one of the aforementioned markets, then the Company will make payments to the Investors in such amounts and at such times as shall be determined pursuant to this Section 2(c) as partial relief for the damages to the Investors by reason of any such delay in or reduction of their ability to sell the Registrable Securities (which remedy shall not be exclusive of any other remedies available at law or in equity). The Company shall pay to each holder of the Notes or Registrable Securities an amount equal to the then outstanding principal amount of the Notes (and, in the case of holders of Registrable Securities, the principal amount of Notes from which such Registrable Securities were converted) (" Outstanding Principal Amount "), multiplied by the Applicable Percentage (as defined below) times the sum of: (i) the number of months (prorated for partial months) after the Filing Date (180 days if caused by SEC comments) or the end of the aforementioned one hundred and one hundred and twenty (120) day period and prior to the date the Registration Statement is declared effective by the SEC, provided, however, that there shall be excluded from such period any delays which are solely attributable to changes required by the Investors in the Registration Statement with respect to information relating to the Investors, including, without limitation, changes to the plan of distribution, or to the failure of the Investors to conduct their review of the Registration Statement pursuant to Section 3(h) below in a reasonably prompt manner; (ii) the number of months (prorated for partial months) that sales of all of the Registrable Securities cannot be made pursuant to the Registration Statement after the Registration Statement has been declared effective (including, without limitation, when sales cannot be made by reason of the Company92s failure to properly supplement or amend the prospectus included therein in accordance with the terms of this Agreement, but excluding any days during an Allowed Delay (as defined in Section 3(f)); and (iii) the number of months (prorated for partial months) that the Common Stock is not listed or included for quotation on the OTCBB, Nasdaq, Nasdaq SmallCap, NYSE or AMEX or that trading thereon is halted after the Registration Statement has been declared effective. The term " Applicable Percentage " means two hundredths (.02). (For example, if the Registration Statement becomes effective one (1) month after the end of such one hundred and one hundred and twenty (120) day period (or 180 days as set forth above), the Company would pay $5,000 for each $250,000 of Outstanding Principal Amount. If thereafter, sales could not be made pursuant to the Registration Statement for an additional period of one (1) month, the Company would pay an additional $5,000 for each $250,000 of Outstanding Principal Amount.) Such amounts shall be paid in cash or, at the Company92s option, in shares of Common Stock priced at the Conversion Price (as defined in the Notes) on such payment date.

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d. Piggy-Back Registrations . Subject to the last sentence of this Section 2(d), if at any time prior to the expiration of the Registration Period (as hereinafter defined) the Company shall determine to file with the SEC a Registration Statement relating to an offering for its own account or the account of others under the 1933 Act of any of its equity securities (other than on Form S-4 or Form S-8 or their then equivalents relating to equity securities to be issued solely in connection with any acquisition of any entity or business or equity securities issuable in connection with stock option or other bona fide , employee benefit plans), the Company shall send to each Investor who is entitled to registration rights under this Section 2(d) written notice of such determination and, if within fifteen (15) days after the effective date of such notice, such Investor shall so request in writing, the Company shall include in such Registration Statement all or any part of the Registrable Securities such Investor requests to be registered, except that if, in connection with any underwritten public offering for the account of the Company the managing underwriter(s) thereof shall impose a limitation on the number of shares of Common Stock which may be included in the Registration Statement because, in such underwriter(s)92 judgment, marketing or other factors dictate such limitation is necessary to facilitate public distribution, then the Company shall be obligated to include in such Registration Statement only such limited portion of the Registrable Securities with respect to which such Investor has requested inclusion hereunder as the underwriter shall permit. Any exclusion of Registrable Securities shall be made pro rata among the Investors seeking to include Registrable Securities in proportion to the number of Registrable Securities sought to be included by such Investors; provided , however , that the Company shall not exclude any Registrable Securities unless the Company has first excluded all outstanding securities, the holders of which are not entitled to inclusion of such securities in such Registration Statement or are not entitled to pro rata inclusion with the Registrable Securities; and provided , further , however , that, after giving effect to the immediately preceding proviso, any exclusion of Registrable Securities shall be made pro rata with holders of other securities having the right to include such securities in the Registration Statement other than holders of securities entitled to inclusion of their securities in such Registration Statement by reason of demand registration rights. No right to registration of Registrable Securities under this Section 2(d) shall be construed to limit any registration required under Section 2(a) hereof. If an offering in connection with which an Investor is entitled to registration under this Section 2(d) is an underwritten offering, then each Investor whose Registrable Securities are included in such Registration Statement shall, unless otherwise agreed by the Company, offer and sell such Registrable Securities in an underwritten offering using the same underwriter or underwriters and, subject to the provisions of this Agreement, on the same terms and conditions as other shares of Common Stock included in such underwritten offering. Notwithstanding anything to the contrary set forth herein, the registration rights of the Investors pursuant to this Section 2(d) shall only be available in the event the Company fails to timely file, obtain effectiveness or maintain effectiveness of any Registration Statement to be filed pursuant to Section 2(a) in accordance with the terms of this Agreement.

e. Eligibility for Form S-3, SB-2 or S-1; Conversion to Form S-3 . The Company represents and warrants that it meets the requirements for the use of Form S-3, SB-2 or S-1 for registration of the sale by the Initial Investors and any other Investors of the Registrable Securities. The Company agrees to file all reports required to be filed by the Company with the SEC in a timely manner so as to remain eligible or become eligible, as the case may be, and thereafter to maintain its eligibility, for the use of Form S-3. If the Company is not currently eligible to use Form S-3, not later than five (5) business days after the Company

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first meets the registration eligibility and transaction requirements for the use of Form S-3 (or any successor form) for registration of the offer and sale by the Initial Investors and any other Investors of Registrable Securities, the Company shall file a Registration Statement on Form S-3 (or such successor form) with respect to the Registrable Securities covered by the Registration Statement on Form SB-2 or Form S-1, whichever is applicable, filed pursuant to Section 2(a) (and include in such Registration Statement on Form S-3 the information required by Rule 429 under the 1933 Act) or convert the Registration Statement on Form SB-2 or Form S-1, whichever is applicable, filed pursuant to Section 2(a) to a Form S-3 pursuant to Rule 429 under the 1933 Act and cause such Registration Statement (or such amendment) to be declared effective no later than sixty (60) days after filing. In the event of a breach by the Company of the provisions of this Section 2(e), the Company will be required to make payments pursuant to Section 2(c) hereof.

3. OBLIGATIONS OF THE COMPANY.

In connection with the registration of the Registrable Securities, the Company shall have the following obligations:

a. The Company shall prepare promptly, and file with the SEC not later than the Filing Date, a Registration Statement with respect to the number of Registrable Securities provided in Section 2(a), and thereafter use its best efforts to cause such Registration Statement relating to Registrable Securities to become effective as soon as possible after such filing but in no event later than one hundred and one hundred and twenty (120) days from the date of Closing or 180 days if applicable), and keep the Registration Statement effective pursuant to Rule 415 at all times until such date as is the earlier of (i) the date on which all of the Registrable Securities have been sold and (ii) the date on which the Registrable Securities (in the opinion of counsel to the Initial Investors) may be immediately sold to the public without registration or restriction (including, without limitation, as to volume by each holder thereof) under the 1933 Act (the " Registration Period "), which Registration Statement (including any amendments or supplements thereto and prospectuses contained therein) shall not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein, or necessary to make the statements therein not misleading.

b. The Company shall prepare and file with the SEC such amendments (including post-effective amendments) and supplements to the Registration Statements and the prospectus used in connection with the Registration Statements as may be necessary to keep the Registration Statements effective at all times during the Registration Period, and, during such period, comply with the provisions of the 1933 Act with respect to the disposition of all Registrable Securities of the Company covered by the Registration Statements until such time as all of such Registrable Securities have been disposed of in accordance with the intended methods of disposition by the seller or sellers thereof as set forth in the Registration Statements. In the event the number of shares available under a Registration Statement filed pursuant to this Agreement is insufficient to cover all of the Registrable Securities issued or issuable upon conversion of the Notes and exercise of the Warrants, the Company shall amend the Registration Statement, or file a new Registration Statement (on the short form available therefor, if applicable), or both, so as to cover all of the Registrable Securities, in each case, as soon as practicable, but in any event within fifteen (15) days after

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the necessity therefor arises (based on the market price of the Common Stock and other relevant factors on which the Company reasonably elects to rely). The Company shall use its best efforts to cause such amendment and/or new Registration Statement to become effective as soon as practicable following the filing thereof, but in any event within thirty (30) days after the date on which the Company reasonably first determines (or reasonably should have determined) the need therefor. The provisions of Section 2(c) above shall be applicable with respect to such obligation, with the one hundred and one hundred and twenty (120) days running from the day the Company reasonably first determines (or reasonably should have determined) the need therefor.

c. The Company shall furnish to each Investor whose Registrable Securities are included in a Registration Statement and its legal counsel promptly (but in no event more than two (2) business days) after the same is prepared and publicly distributed, filed with the SEC, or received by the Company, one copy of each Registration Statement and any amendment thereto, each preliminary prospectus and prospectus and each amendment or supplement thereto, and, in the case of the Registration Statement referred to in Section 2(a), each letter written by or on behalf of the Company to the SEC or the staff of the SEC, and each item of correspondence from the SEC or the staff of the SEC, in each case relating to such Registration Statement (other than any portion of any thereof which contains information for which the Company has sought confidential treatment), and promptly (but in no event more than two (2) business days) after the Registration Statement is declared effective by the SEC, such number of copies of a prospectus, including a preliminary prospectus, and all amendments and supplements thereto and such other documents as such Investor may reasonably request in order to facilitate the disposition of the Registrable Securities owned by such Investor. The Company will immediately notify each Investor by facsimile of ...