Material Safety Data Sheet


SECTION I - Material Identity
SECTION II - Manufacturer's Information
SECTION III - Physical/Chemical Characteristics
SECTION IV - Fire and Explosion Hazard Data
SECTION V - Reactivity Data
SECTION VI - Health Hazard Data
SECTION VII - Precautions for Safe Handling and Use
SECTION VIII - Control Measures
SECTION IX - Label Data
SECTION X - Transportation Data
SECTION XI - Site Specific/Reporting Information
SECTION XII - Ingredients/Identity Information



SECTION I - Material Identity
Item Name                               
Part Number/Trade Name                   OS-20; METHYL SILOXANE
National Stock Number                    6850014120041
CAGE Code                                5D028
Part Number Indicator                    A
MSDS Number                              183880
HAZ Code                                 B


SECTION II - Manufacturer's Information
Manufacturer Name                        DOW CORNING CORPORATION
P.O. Box                                 N/K
Street                                   3901 SOUTH SAGINAW ROAD
City                                     MIDLAND
State                                    MI
Country                                  US
Zip Code                                 48686-5601
Emergency Phone                          517-496-6000/517-496-5900
Information Phone                        517-496-5813/517-496-8577

MSDS Preparer's Information
Street                                   3901 SOUTH SAGINAW ROAD
City                                     MIDLAND
State                                    MI
Zip Code                                 48686-5601
Date MSDS Prepared/Revised               15JUL98
Date of Technical Review                 13DEC94
Active Indicator                         N

Alternate Vendors


SECTION III - Physical/Chemical Characteristics
Hazard Storage Compatibility Code        NR
NRC License Number                       NR
Net Propellant Weight (Ammo)             NR
Appearance/Odor                          COLORLESS LIQUID/SLIGHT ODOR 
Boiling Point                            NR`
Melting Point                            115.60F
Vapor Pressure                           3.88
Vapor Density                            NR
Specific Gravity                         0.81
Decomposition Temperature                NR
Evaporation Rate                         NR
Solubility in Water                      NR
Percent Volatiles by Volume              100
Chemical pH                              NR
Corrosion Rate                           NR
Container Type                           F
Container Pressure Code                  1
Temperature Code                         4
Product State Code                       L


SECTION IV - Fire and Explosion Hazard Data
Flash Point Method                       UNK
Lower Explosion Limit                    0.9
Upper Explosion Limit                    13.8
Extinguishing Media                      ON LARGE FIRES, USE ALCOHOL COMPATIBLE FOAM OR WATER SPRAY. ON SMALL FIRES USE MEDIUM EXPANSION, ALCOHOL COMPATIBLE FOA
Special Fire Fighting Procedures         SCBA, WEAR FULL PROTECTIVE CLOTHING
Unusual Fire/Explosion Hazards           FIRE BURNS MORE VIGOROUSLY THAN WOULD BE EXPECTED. VAPORS ARE HEAVIER THAN AIR AND MAY TRAVEL TO A SOURCE OF IGNITION AND FLASH BACK


SECTION V - Reactivity Data
Stability                                YES
Stability Conditions to Avoid            NONE
Materials to Avoid                       OXIDIZING MATERIAL CAN CAUSE A REACTION
Hazardous Decomposition Products         NR
Hazardous Polymerization                 NO
Polymerization Conditions to Avoid       WILL NOT OCCUR


SECTION VI - Health Hazard Data
Route of Entry: Skin                     YES
Route of Entry: Ingestion                YES
Route of Entry: Inhalation               YES
Health Hazards - Acute and Chronic       [EYES] REDNESS, DISCOMFORT [SKIN] NO SIGNIFICANT IRRITATION FROM A SINGLE SHORT-TERM EXPOSURE [INHAL] NO SIGNIFICANT EFFECTS FROM A SINGLE SHORT-TERM EXPOSURE [INGEST] LOW INGEST HAZARD IN NORMAL USE, SWALLOWING LARGE AMOUNTS MAY CAUSE DROWSINESS
Carcinogenity: NTP                       NR
Carcinogenity: IARC                      NR
Carcinogenity: OSHA                      NR
Explanation of Carcinogenity             NR
Symptoms of Overexposure                 NO KNOWN APPLICABLE INFORMATION
Medical Cond. Aggrevated by Exposure     NONE KNOWN
Emergency/First Aid Procedures           [EYE] IMMED FLUSH W/ WATER [SKIN] REMOVE FROM SKIN AND WASH W/ SOAP AND WATER, GET DR [INHAL] REMOVE TO FRESH AIR, GET DR [INGEST] GET MEDICAL ATTENTION


SECTION VII - Precautions for Safe Handling and Use
Steps if Material Released/Spilled       REMOVE POSSIBLE IGNITION SOURCES, DISPOSE OF SATURATED ABSORBENT OR CLEANING MATERIALS APPROPRIATELY, SINCE SPONTANEOUS HEATING MAY OCCUR. DETERMINE WHETHER TO EVACUATE OR ISOLATE THE AREA. LARGE SPILLS: DIKE, PUMP, STORE RECOVERED MATERIAL IN APPROP CONTAINER
Neutralizing Agent                       NR
Waste Disposal Method                    DISPOSE IAW FEDERAL, STATE, LOCAL REGULATIONS
Handling and Storage Precautions         KEEP CONTAINERS CLOSED
Other Precautions                        NR


SECTION VIII - Control Measures
Respiratory Protection                   USE RESPIRATORY PROTECTION UNLESS ADEQUATE LOCAL EXHAUST VENTILATION IS PROVIDED OR AIR SAMPLING DATA SHOW EXPOSURE ARE WITHIN RECOMMENDED EXPOSURE GUIDELINES 
Ventilation                              LOCAL: RECOMMENDED GENERAL: RECOMMENDED
Protective Gloves                        CHEMICAL GLOVES
Eye Protection                           SAFETY GLASSES AS A MINIMUM
Other Protective Equipment               NR
Work Hygenic Practices                   WASH HANDS AFTER USE
Supplemental Health/Safety Data          NR
Disposal Code                            O


SECTION IX - Label Data
Protect Eye                              YES
Protect Skin                             YES
Protect Respiratory                      YES
Chronic Indicator                        UNKNOWN
Contact Code                             SLIGHT
Fire Code                                UNKNOWN
Health Code                              UNKNOWN
React Code                               UNKNOWN


SECTION X - Transportation Data
Container Quantity                       30
Unit of Measure                          LB


SECTION XI - Site Specific/Reporting Information
Volatile Organic Compounds (P/G)         0
Volatile Organic Compounds (G/L)         0


SECTION XII - Ingredients/Identity Information
Ingredient #                             01
Ingredient Name                          OCTAMETHYLTRISILOXANE (>60%)
CAS Number                               107517
NIOSH Number                             1012055OE
Proprietary                              NO
Percent                                  60
OSHA PEL                                 N/K
ACGIH TLV                                N/K
Recommended Limit                        200 PPM TWA