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| CERTIFICATE      OF AMENDMENT                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
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| CERTIFICATE      OF INCORPORATION                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
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| ACETO      CORPORATION                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
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| Under Section 805 of the Business Corporation      Law                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
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|                           The undersigned, being the president and the secretary of ACETO      CORPORATION, do hereby certify and set forth:                                                                                                                                                                                                                                                                |
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|                            (1)     The name of the      corporation is ACETO CORPORATION. The name under which the corporation was      formed is ACETO CHEMICAL CO. INC.                                                                                                                                                                                                          |
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|                            (2)     The date the Certificate of      Incorporation was filed by the Department of  State is the 13th      day of  June, 1947.                                                                                                                                                                                                   |
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|                       (3)     The      Certificate of Incorporation is hereby amended by the addition of the      following provision fixing the number, designation, relative rights,      preferences and limitations of Fourth Series Preferred Stock as fixed by      the Board pursuant to authority vested in it by the Certificate of      Incorporation, to wit: |

|   | A.           The number of shares in said series is      40,000 shares of preferred stock, par value $2.50 per    share.                                                                                                                                                                                                                                                                                                                                                 |   |
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|   | B.     The      said series is designated Fourth Series Preferred Stock.                                                                                                                                                                                                                                                                                                                                                                                                 |   |
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|   | C.     The      holders of said Fourth Series Preferred stock shall be entitled to receive      cumulative dividends, as and when declared by the Board of Directors, out      of the annual net profits of the Corporation, at the rate of 8% per annum      payable semi-annually on June 15th and December 15th of each year before      any dividends shall be declared or paid upon or set apart for the common      stock, or any other series of preferred stock. |   |

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|   | D.     In      any year after said fourth series. Preferred, and the Third Series      Preferred and the Second Series Preferred Stock and the First Series      Preferred Stock which is issued and outstanding has received its      stipulated dividends and any arrearages thereof that may be due and      unpaid, the directors may elect to make any further distributions of      dividends to holders of the shares of common stock.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |
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|   | E.     In      case of any liquidation, dissolution, or winding up of the affairs of the      corporation, whether voluntary or involuntary, and after payment of all of      the debts of the corporation, the assets shall be distributed among the      holders of any series of preferred stock in accordance with the      preferences and limitations of the series and the remainder among the      holders of  the common stock, share and share alike, subject      to  the limitation that, if the stated dividends and amounts      payable on liquidation are not paid in full, the shares of all series of      the same class shall share ratably in the payment of dividends including      accumulations, if any, in accordance with the sums which would be payable      on such shares if all dividends were declared and paid in full, and in any      distribution of assets other than by way of dividends in accordance with      the sums which would be payable on such distribution if all sums payable      were discharged in full. |   |
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|   | F.     The      holders of Fourth Series Preferred Stock shall have voting power and shall      entitle such holders to cast a number of  votes which is equal      to the number of such holder’s shares, shall have the right to participate      in any meeting of stockholders, shall be entitled to notice of any such      meeting, and shall be considered stockholders for the purpose of any      election, meeting, consent, or waiver of notice, under the provisions of      any law now in force or which any hereafter be enacted. If there shall be      an increase in the common stock of the Corporation through stock split,      stock distribution, stock dividend or the like, appropriate adjustment      shall be made in the number of votes which the holders      of  Fourth Series Preferred Stock shall be entitled to      cast.                                                                                                                                                                                           |   |

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|   | G.     Any      holder of Fourth Series Preferred Stock may at any time, subject as      hereinafter set forth with respect to the redemption of such stock,      convert all or any of the shares of such stock held by such holder into      the shares of common stock of the Corporation as hereinafter specified, by      the surrender to the Corporation for cancellation of the certificate or      certificates representing the preferred stock so to be converted, and upon      such surrender shall be entitled to receive therefor one or more      certificates for the number of shares of common stock which on said      conversion, as hereinafter specified, the Corporation shall be required to      issue. The basis for said conversion shall be at the rate of six and four      tenths (6.4) shares of Fourth Series Preferred Stock for one (1) share of      common stock, without any adjustments for current dividends. If there      shall be any change in the stock of the Corporation through merger,      consolidation, reorganization, stock split, stock distribution, stock      dividend or other change in the corporate structure of the corporation,      appropriate adjustment shall be made in the basis for      conversion.                                                                                                                                                                                                                                                             |   |
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|   | H.     The      Corporation at its option may, pursuant to Sections 512 and 513 of the      Business Corporation Law, redeem the whole or any part of the Fourth      Series Preferred Stock outstanding at any time pro rata or by lot; by      paying therefor the greater of $2.50 per share or an amount equal to the      difference between $16.00 and the market price of the number of shares of      common stock into which such number of preferred shares would have been      convertible pursuant to the provisions of paragraph (3)G hereof, together      with any accumulated dividends due thereon on the date specified for      redemption thereof by mailing notices of such redemption to the holders of      the Fourth Series Preferred Stock to be redeemed. The notice of such      redemption shall be mailed not less than fifteen (15) days prior to the      date upon which the stock is to be redeemed to each holder of stock so to      be redeemed, at such holder’s address as it appears on the books of the      Corporation. On and after the date fixed for such redemption, the holders      of shares so called for redemption shall cease to be entitled to any      further dividends, and the respective holders thereof shall have no right      or interest thereon or therein, by reason of the ownership of such shares,      except to receive the      said redemption price, as a debt without interest, upon presentation and      surrender of their certificates therefor. |   |

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|   | /s/      Seymour Mann          |   |
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|   | Seymour      Mann, President   |   |
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|   | /s/      Arnold Frankel        |   |
|   | Arnold      Frankel, Secretary |   |