MATERIAL SAFETY DATA SHEET

SECTION I � Product/Company Information

                                                      ®

                                     TYLOK -PLUSâ„? Radiopaque Polycarboxylate Cement

1.1 Product Trade Name:

1.2 Part (Item) Number:              620200 � 620201

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.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:                   12/03/97 Date Revised 12/03/00



SECTION II � Hazardous Ingredients/Identity Information

Hazardous Components              OSHA PEL                ACGIH TLV        CAS #           Percent

                                  10 mg/mm3               10 mg/mm3

Zinc oxide                                                                 1314-13-2      Greater than 75%

Polyacrylic acid                  N. A.                   N. A.            9003-01-4      < 10 %

                                  2.5 mg\m3               2.5 mg\m3

Stannous Fluoride                                                          7783-47-3      < 15 %



SECTION III � Physical/Chemical Characteristics

                                                             3.6 Specific Gravity: 4.5 g/cm3

3.1 Boiling point:       N. A.

3.2 Vapor pressure:      N. A.                               3.7 Melting Point:      N. A.

3.3 Vapor density:       N. A.                               3.8 Evaporation rate: N. A.

3.4 Solubility in water: Slightly Soluble

3.5 Appearance and odor: Light pink, free flowing powder with free acidic odor.



SECTION IV - Fire and Explosion Hazard Data

4.1 Flash point (method used):           N. A.

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 polyacrylic

                                         acid may be present.



SECTION V � Reactivity Data

5.1 Stability:                             Unstable:                 Stable: X

5.2 Conditions to avoid (stability):       Strong acids, water or moisture (relative humidity >50%)

                                           will cause the material to harden.

5.3 Incompatibility (materials to avoid):  Strong acids, strong oxidizing agents.

5.4 Hazardous decomposition or byproducts: Oxides of Zinc

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

5.6 Conditions to avoid (polymerization):  Strong acids and water.

SECTION VI - Health Hazard Data

6.1 Route(s) of entry:                  Inhalation?: Yes Skin?: Yes Ingestion?: Yes

6.2 Health hazards (acute and chronic): Ingestion may cause local irritation to soft tissue. Eyes: severe irritation

                                        caused by reaction of powder with water. May adhere to tissue. May dry the

                                        skin causing irritation.

6.3 Carcinogenicity:                    NTP?: Not listed IARC monographs?: Not listed

                                        OSHA Regulated?: No

6.4 Signs and symptoms of exposure: Redness or irritation of eyes or skin.

6.5 Medical conditions generally

     aggravated by exposure:            Open wounds or sores of the skin.

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

                                        physician. 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:                     Sweep up spilled powder 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.

7.4 Other precautions:                        Observe normal warehouse handling procedures.



SECTION VIII - Control Measures / Personal Protection

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

                                                  ventilation or approved nuisance dust mask, if in large quantities.

8.2 Ventilation:                                  Local exhaust.

8.3 Protective gloves:                            Rubber gloves.

8.4 Eye protection:                               Close fitting protective goggles.

8.5 Other protective clothing or equipment:       Rubber apron.

8.6 Work/Hygienic practices:                      Observe normal care when working with chemicals.







         NFPA HAZARD

       CLASSIFICATIONS

Health                1                     NFPA � National Fire Protection Association

Flammability          0                     N.A. - Not Applicable

Reactivity            1                     N.E. - Not Established

Specific Hazard     N. A.



                                                                                                520898 (R-12/03/00)