<Page> FORM 8-A SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 CANTEL MEDICAL CORP. ---------------------- (Exact name of registrant as specified in its charter) DELAWARE 22-1260285 - ------------------------------------- ----------------------------------------- (State of incorporation) IRS Employer Identification No.) or organization) 150 CLOVE ROAD, LITTLE FALLS, NEW JERSEY 07424 - -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip Code) Securities to be registered pursuant to Section 12(b) of the Act: <Table> <Caption> Title of each class Name of each exchange on which to be so registered each class is to be registered Common Stock, par value $.10 New York Stock Exchange </Table> Securities to be registered pursuant to Section 12(g) of the Act: NONE <Page> Item 1: DESCRIPTION OF REGISTRANTS SECURITIES TO BE REGISTERED ------------------------------------- COMMON STOCK, PAR VALUE $.10 The Capital Stock of Cantel Medical Corp. (the "Company") to be registered on the New York Stock Exchange, Inc. (the "Exchange") is the Company's Common Stock, par value $.10 per share ("Common Stock"). Holders of Common Stock are entitled to one vote per share at all meetings of stockholders. Dividends that may be declared on the Common stock will be paid in an equal amount to the holder of each share. No pre-emptive rights are conferred upon the holders of such Stock and there are no liquidation or conversion rights. There are no redemption or sinking fund provisions and there is no liability to further calls or to assessments by the Company. Item 2: EXHIBITS 1. All exhibits required by Instruction II to Items 2 will be filed with the Exchange. 2 <Page> SIGNATURES Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned hereunto duly authorized. Dated: May 21, 2002 CANTEL MEDICAL CORP. By: /s/ James P. Reilly --------------------------- James P. Reilly, President and Chief Executive Officer 3