MATERIAL SAFETY DATA SHEET

SECTION I � Product/Company Identification



                                            REPROSIL® Impression Material

1.1 Product Trade Name:

1.2 Part (Item) Number:                     626000 � 626999 All Package Configurations

1.3 Division Name:                          DENTSPLY Caulk

1.4 Address:                                38 West Clarke Avenue

    City State Zip:                         Milford DE 19963-0359

    Internet Address:                       http://www.caulk.dentsply.com

1.5 Emergency Telephone Number:             (800) 424-9300 (Chemtrec)

1.6 Telephone Number for Information:       (302) 422-4511 (8:00 AM � 4:30 PM Eastern Time)

1.7 Date Prepared:                          8/4/99 Date Revised: 08/03/02



SECTION II - Hazardous Ingredients/Identity Information

Hazardous Components                 OSHA PEL          ACGIH TLV CAS #                     Percent

                                      1.2 mg/m3        10 mg/m3

Silicon Dioxide (Amorphous )                                             7631-86-9          5 � 30 %

                                      0.05 mg/m3       0.05 mg/m3

Silicon Dioxide (Crystalline)                                            14464-46-1         5 - 30 %

                                      10 mg/m3         10 mg/m3

Titanium Dioxide                                                         13463-67-7         less than 5 %

                                                3

                                                       10 mg/m3

Calcium Sulfate                       10 mg/m                            7778-18-9          less than 10 %

Non-Hazardous Components

Vinyl dimethyl polydimethylsiloxane   N. E.            N. E.             68083-19-2         30 � 60 %

Organic Plasticizer                   N. E.            N. E.             68515-40-2         less than 5 %

Polymethylhydrogen siloxane           N. E.            N. E.             68037-59-2         less than 10 %

Phenolic Surfactant                   N. E.            N. E.             9016-45-9          less than 5 %

Fluorescent organic dye               N. E.            N. E.             39277-28-6         less than 2 %

Ultramarine pigments                  N. E.            N. E.             12769-96-9         less than 2 %

Other Information: The Chemical structure of all Ultramarine pigments, regardless of color, are Sodium Aluminosulfosilicate Other

colorants are inorganic iron oxides.



SECTION III - Physical/Chemical Characteristics

                         >200oC                              3.6 Specific Gravity: Varies from 1.2 g/cm3

3.1 Boiling point:

                                                                      to 1.45 g/cm3 depending upon viscosity

3.2 Vapor pressure:      N.E.

3.3 Vapor density:       N. A.                               3.7 Melting Point:       N.E.

3.4 Solubility in water: Not Soluble                         3.8 Evaporation rate: <1

3.5 Appearance and odor:Various colored pastes with faint sweet odor.



SECTION IV - Fire and Explosion Hazard Data

                                        > 415oF (Pensky Martin CC ASTM 093)

4.1 Flash point (method used):

4.2 Flammability (explosive limits):    LEL: N.E.                         UEL: N.E.

4.3 Extinguishing media:                Sand, foam, carbon dioxide, or dry chemical.

4.4 Special fire fighting procedures:   Fire fighter should wear full protective clothing including a self-contained breathing

                                        apparatus.

4.5 Unusual fire and explosion hazards: During a fire, irritating gasses from the decomposition of the silicone resins may be

                                        present.



SECTION V � Reactivity Data

5.1 Stability:                                   Unstable:              Stable: X

5.2 Conditions to avoid (stability):             Heat greater than 60°C (140°F)

5.3 Incompatibility (materials to avoid):        Condensation silicones, tin and sulfur, amines and peroxides.

5.4 Hazardous decomposition or byproducts:       N.E.

5.5 Hazardous polymerization:                    May occur:             Will not occur: X

5.6 Conditions to avoid (polymerization):        Extreme heat.

SECTION VI - Health Hazard Data

6.1 Route(s) of entry:                  Inhalation?: No Skin?: Yes Ingestion?: Yes

6.2 Health hazards (acute and chronic): Contact with eyes and skin may cause irritation. In susceptible persons, skin reactions

                                        may occur. This is short term and should go away after washing with soap and water.

6.3 Carcinogenicity:                    NTP?: Not listed     IARC monographs?: Not listed           OSHA Regulated?: No

                                        All components of this product are in compliance with the inventory listing requirements

                                        of the U. S. Toxic Substances Control Act (TSCA) Chemical Substance Inventory.



6.4 Signs and symptoms of exposure:          Product may irritate the eyes and skin. Eye contact: irritation and possible corneal

                                             damage. Skin contact: irritation or possible allergic response. Reddish rashes may be

                                             seen on the skin. Ingestion: Low order of toxicity is expected when large amounts of

                                             material are ingested. Acute toxicology study in rats LD50 >2,000mg/kg.

6.5 Medical conditions generally

 aggravated by exposure:                     Possible skin rashes.

6.6 Emergency first aid procedures:          In case of eye contact, flush with flowing water for 15 minutes and get medical

                                             attention. Skin: Flush with flowing water for 15 minutes, then wash area with mild

                                             soap and water. Call physician.



SECTION VII - Precautions for Safe Handling and Use

7.1 Steps to be taken in case material is

     released or spilled:                     Spread vermiculite on paste to absorb any resin. Scoop up and place in an appropriately

                                              marked container.

7.2 Waste disposal methods:                   Dispose of in accordance with Federal, State and Local regulations.

7.3 Precautions to be taken in handling

    and storage:                              Store away from food and beverages. Store away from extreme heat.

7.4 Other precautions:                        Avoid contact with skin. Observe normal warehouse handling procedures. Handling of

                                              this product should be by trained dental healthcare professionals only.



SECTION VIII � Control Measures / Personal Protection

8.1 Respiratory protection:                       None required during normal use of this product.

8.2 Ventilation:                                  Local exhaust recommended.

8.3 Protective gloves:                            Vinyl gloves. Latex or Rubber gloves may inhibit set.

8.4 Eye protection:                               Protective goggles.

8.5 Other protective clothing or equipment:       Apron.

8.6 Work/Hygienic practices:                      Observe normal care when working with chemicals. Avoid eye and skin

                                                  contact, inhalation and ingestion. Do not eat, drink or smoke when using.

         NFPA HAZARD

       CLASSIFICATIONS

Health                0                     NFPA - National Fire Protection Association

Flammability          1                     N.A. - Not Applicable

Reactivity            0                     N.E. - Not Established

Specific Hazard     N. A.



                                                                                                          526385 (R-08/03/02)