1 of 4









                        MATERIAL SAFETY DATA SHEET

                        Gypsum Wallboard Panels







                                          SECTION I

                                    PRODUCT IDENTIFICATION



                      Gypsum (Calcium Sulfate DihydrateCaS04 �2H20)

Chemical Family:



DATE PREPARED:

       July 3, 2008



MANUFACTURE NAME AND CONTACT INFORMATION:

      American Gypsum

      3811 Turtle Creek Blvd., #1200

      Dallas, TX 75219

      Product Safety: 1-800-545-6302 ext. 5608

      Contact Name: Mike Danks



PRODUCTS:

      EAGLEROC® REGULAR GYPSUM BOARD                    FIREBLOC® TYPE X GYPSUM BOARD

      FIREBLOC® “TYPE C� GYPSUM BOARD                   AQUABLOC® GYPSUM BOARD

      EXTERIOR GYPSUM SHEATHING                         INTERIOR CEILING BOARD

      EXTERIOR SOFFIT BOARD                             VENEER PLASTER GYPSUM BOARD

      SHAFT LINER                                       SMOOTHROC® GYPSUM BOARD

      M-BLOC® SHAFT LINER                               EAGLEROC® LAMINATE BASE GYPSUM BOARD

      M-BLOC® GYPSUM BOARD                              M-BLOC® TYPE X GYPSUM BOARD



                                          SECTION II

                                    HAZARDOUS INGREDIENTS





                                                     TLV (mg/m3)        PEL (mg/m3)

       MATERIAL                            WT%                                        CAS Number

       Gypsum (Calcium Sulfate)            80-100          10           15(T)/5(R)    13397-24-5

       Paper (Cellulose)                   1-10            10           15(T)/5(R)    9004-34-6

       Starch                              0-1             10           15(T)/5(R)    9005-25-8

       Boric Acid                          0-1             NE               NE        10043-35-3

       Potassium Sulfate                   0-1             NE               NE        7778-80-5

       Vermiculite                         0-1             5            15(T)/5(R)    01318-00-9

       Glass Fiber                         0-1             NE               NE        65944-17-3

       Paraffin Wax                        0-2             2(fume)        2(fume)     8002-74-2

       Crystalline Silica                  0-0.5           0.1(R)           0.1(R)    14808-60-7

       (T) - Total      (R) � Respirable       (NE) - Not Established

       Contains No Asbestos. HMIS Hazard Class Number 1, 0, 0.

                                                                                                     2 of 4



                                     SECTION III

                         PHYSICAL/CHEMICAL CHARACTERISTICS



PHYSICAL DATA

  �   Boiling Point - Not Applicable

  �   Specific Gravity - Not Applicable

  �   Vapor Pressure (MM OF Mercury) - Not Applicable

  �   Vapor Density (Air = 1) - Not Applicable

  �   Evaporation Rate - Not Applicable

  �   Solubility in H2O (% by wt.) - 0.241 gs/100cc

  �   Appearance - White, chalky material between face and back paper(s) or foil.

  �   Odor - No Odor





                                        SECTION IV

                             FIRE AND EXPLOSION HAZARD DATA



  �   Flash point - None

  �   Lower Explosion Limit - None

  �   Upper Explosion Limit - None

  �   Auto Ignition Temperature - Not Combustible

  �   Extinguishing Media - Not Combustible

  �   Special Fire Fighting Procedures - None. Although, gypsum panels pose no fire related hazards, a self-

      contained breathing apparatus is recommended to limit exposure to combustion product when fighting any

      fire.

  �   Hazardous combustion products - None

  �   Unusual fire and explosion hazards - None





                                            SECTION V

                                         REACTIVITY DATA



  �   Stability - Product is stable.

  �   Conditions to Avoid - High relative humidity will cause panels to deteriorate.

  �   Incompatible Materials and Conditions to Avoid - Reaction with strong acids will generate carbon

      dioxide.

  �   Hazardous Polymerization - Does not occur

  �   Hazardous Decomposition - Above 1450° F could produce SO2 and CaO.

                                                                                                             3 of 4





                                             SECTION VI

                                         HEALTH HAZARD DATA



American Gypsum wallboard panels do not present an inhalation, ingestion or contact health hazard. It is not

recommended that sawing, sanding, grinding, or machining be performed on the product. Scoring and snapping

method is recommended to avoid creating dust. If sawing is absolutely necessary, dust collection systems,

vacuuming, and the utilization of side shield safety glasses, NIOSH approved respirator, etc., may be necessary.

Inhalation of dust generated from sawing and sanding could irritate nasal and throat tissues.



Potential Health Effects:

    �   Eye contact: With airborne dust may cause irritation to the eye.

    �   Skin contact: May cause dryness, itching and irritation.

    �   Ingestion: Large amounts may cause intestinal discomfort or distress.

    �   Inhalation: Dust from cutting or sawing may cause irritation of nose, throat, or lungs. Prolonged

        inhalation of the dust may cause lung disease such as silicosis. Gypsum panels may contain small amounts

        of free crystalline silica. Prolonged exposure to respirable free crystalline silica may aggravate other lung

        conditions and may cause lung disease. (See “Carcinogenic Potential� below).

    �   Carcinogenic Potential: Gypsum panels are not listed as a carcinogen by NTP, OSHA, or IARC. They

        may, however, contain trace amounts of substance listed as carcinogens by these organizations.

    �   Crystalline Silica: A potential trace level contaminant in gypsum panels is now classified by IARC as a

        known human carcinogen (Group 1). NTP has characterized respirable silica as “Reasonably anticipated to

        be a carcinogen�.

    �   California Proposition 65: Crystalline silica (CAS #14808-60-7) is considered to be a carcinogen by the

        state of California.



First Aid

    �   Eyes: Remove contact lenses. Flush eyes thoroughly with water, including under eyelids to remove all

        particles. Call physician immediately.

    �   Skin: Wash affected skin gently with soap and water.

    �   Inhalation of airborne dust: Remove to fresh air. Seek medical help if coughing and other symptoms do

        not subside.

    �   Ingestion: Not applicable for product in its supplied form.





                                         SECTION VII

                            PRECAUTIONS FOR SAFE HANDLING AND USE



    �   General - Keep material dry. Stack or store all panels flat. Panels are heavy and can fall over, causing

        serious injury or death. Use proper lifting methods and equipment. Do not move unless authorized.

    �   Storage Temperature - Should not be stored or used where temperatures exceed 125 F for extended

        periods or in areas of high humidity.

    �   Precautions and safe handling - Safety glasses should be worn when handling and installing the product.

        Gloves or protective clothing are usually not necessary but may be desirable in certain situations. Scoring

        and snapping is the method to be used when cutting the panels in order to reduce the potential for the

        creation of dust.

    �   Waste disposal � Not a hazardous material Dispose of in accordance with local, state, and federal

        regulations.

    �   Transportation Data - Gypsum panels are not hazardous under U.S. Department of Transportation (DOT)

        Regulations.

                                                                                                                  4 of 4



                                                SECTION VIII

                                             CONTROL MEASURES



    �    Ventilation - Use local exhaust to control exposure within applicable limits.

    �    Skin Protection - Gloves or protective clothing are usually not necessary but may be desirable in certain

         situations.

    �    Eye Protection - Wear safety glasses with side shields or goggles. Do not wear contact lenses in dusty

         environments.

    �    Respiratory Protection - Not required for normal handling and use of product. However, the wearing of

         NIOSH approved breathing protection may be necessary for exposure to dust generated from snapping,

         sawing, or remanufacturing this product.





                                             SECTION IX

                                       REGULATORY INFORMATION



    �    OSHA Hazard Communication Rule, 29 CFR 1910.1200 - This product is considered by OSHA to be a

         hazardous chemical and should be included in the employer's hazard communication program.

    �    CERCLA/SUPERFUND, 40 CFR 302 - Not listed.

    �    SARA TITLE III, Sections 311-312 Hazard Category - This product contains substances classified as a

         delayed (chronic) health hazard according to the EPA Hazard Categories promulgated under the Superfund

         Amendment and Reauthorization Act of 1986.

    �    SARA Section 313 Information - This product contains none of the substances subject to the reporting

         requirements of Section 313 of Title III of the Superfund Amendments and Reauthorization Act of 1986

         and 40 CFR Part 372.

    �    Toxic Substance Control Act (TSCA) - This product complies with the TSCA Inventory requirements.

    �    California Proposition 65 - Crystalline silica (CAS - 14808-60-7) is considered to be a carcinogen by the

         State of California.



Note � American Gypsum Company believes the information contained in this MSDS to be accurate at the time of

publication and has been compiled using sources believed to be reliable. However American Gypsum Company

makes no warrant, either expressed or implied concerning the accuracy or completeness of the information

presented. It is the responsibility of the user to comply with local, state, or federal regulations concerning use of this

product. It is the further responsibility of the buyer to research and understand safe methods of use, storage,

handling and disposal of this product.