----

|                     The      undersigned, being the president and the secretary of ACETO CORPORATION,      do hereby certify and set forth:                                                                                                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |   |
|                     (1)   The      name of the corporation is ACETO CORPORATION. The name under which the      corporation was formed is ACETO CHEMICAL CO. INC.                                                                                                                                                                                                     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |   |
|                     (2)   The      date the Certificate of Incorporation was filed by the Department of State      is the 13th day of June, 1947.                                                                                                                                                                                                                    |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |   |
|                     (3)   The      Certificate of Incorporation is hereby amended by the additions of the      following provision fixing the number, designation, relative rights,      preference and limitations of Eighth 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.                                                                                                                                                                                                                                                                                                                                                          |   |
|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |   |
|   | B.     The      said series is designated Eighth Series Preferred Stock.                                                                                                                                                                                                                                                                                                                                                                                                      |   |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |   |
|   | C.     The      holders of said Eighth 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 9% 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. |   |

----

|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |   |
|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |   |
|   | D.     In      any year after said Eighth Series Preferred Stock, and the Seventh Series      Preferred Stock, and the Sixth Series Preferred Stock, and the Fifth      Series Preferred Stock, and the Fourth Series Preferred Stock, and the      Third Series Preferred Stock, 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.                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |   |
|   | 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 share 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. |   |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |   |
|   | F.     The      holders of Eighth 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 may 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 Eighth Series Preferred Stock shall be entitled to      cast.                                                                                                                                                                                          |   |

----

|   | G.     Any      holder of Eighth 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 four and two      tenths (4.2) of Eighth 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.          |   |
|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |   |
|   | 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 Eighth      Series Preferred Stock outstanding at any time pro rata or by lot, by      paying therefor the, sum of $2.50 per share, 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 Eighth Series      Preferred Stock to be redeemed. The notice of such redemption      shall be mailed not less than ninety (90) 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. |   |

----

|                     (4)   The      foregoing amendment of the Certificate of Incorporation was authorized by      the unanimous vote of the Board of Directors of ACETO CORPORATION at a      meeting duly called and held on the 12th day of December,      1990. |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                                                                                                                                                                                                                                                                                                                                  |
|                     IN WITNESS WHEREOF, this      certificate has been subscribed this 4th      day of January 1991, by the undersigned who affirm the statements      made herein are true under the penalties of  perjury.                                                      |

|   | /s/      Robert Parsont         |   |
|--------|---------------------------------|--------|
|   | Robert      Parsont, President  |   |
|   |                            |   |
|   | /s/      Donald Horowitz        |   |
|   | Donald      Horowitz, Secretary |   |