DOW CORNING CORPORATION
Material Safety Data Sheet
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DOW CORNING(R) TC-5021 THERMALLY CONDUCTIVE COMPOUND
1. IDENTIFICATION OF THE SUBSTANCE AND OF THE COMPANY
24 Hour Emergency Telephone:
Customer Service:
Product Disposal Information:
CHEMTREC:Dow Corning Corporation
South Saginaw Road
Midland, Michigan 48686

MSDS No.: 04044491(989) 496-5900(989) 496-6000(989) 496-6315(800) 424-9300

Revision Date: 2007/04/30

Generic Description:
Physical Form:Color:
Odor:

Silicone compound
GreaseGraySlight odor

NFPA Profile: Health1 Flammability

1 Instability/Reactivity0

Note: NFPA = National Fire Protection Association

2. HAZARDS IDENTIFICATIONPOTENTIAL HEALTH EFFECTS
Acute Effects
Eye:

Direct contact may cause temporary redness and discomfort.

Skin:

No significant irritation expected from a single short-term exposure.

Inhalation:

Irritates respiratory passages very slightly.

Oral:

Low ingestion hazard in normal use.

Prolonged/Repeated Exposure Effects
Skin:

Repeated or prolonged exposure may cause irritation.

Inhalation:

No known applicable information.

Oral:

No known applicable information.

Signs and Symptoms of Overexposure
No known applicable information.
Medical Conditions Aggravated by Exposure
No known applicable information.
The above listed potential effects of overexposure are based on actual data, results of studies performed upon similar compositions,

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DOW CORNING(R) TC-5021 THERMALLY CONDUCTIVE COMPOUND
component data and/or expert review of the product. Please refer to Section 11 for the detailed toxicology information.

3. COMPOSITION/INFORMATION ON INGREDIENTSCAS Number
134971-32-7

Wt %Component Name

3.0 - 7.0

Dimethyl, Methyldecyl Siloxane

The above components are hazardous as defined in 29 CFR 1910.1200.

4. FIRST AID MEASURES
Eye:

Immediately flush with water.

Skin:

Remove from skin and wash thoroughly with soap and water or waterless cleanser. Get
medical attention if irritation or other ill effects develop or persist.

Inhalation:

No first aid should be needed.

Oral:

No first aid should be needed.

Notes to Physician:Treat according to person's condition and specifics of exposure.

5. FIRE FIGHTING MEASURES
Flash Point:

Not applicable.

Autoignition Temperature:

Not determined.

Flammability Limits in Air:

Not determined.

Extinguishing Media:

On large fires use dry chemical, foam or water spray. On small fires use carbon dioxide(CO2), dry chemical or water spray. Water can be used to cool fire exposed containers.

Fire Fighting Measures:

Self-contained breathing apparatus and protective clothing should be worn in fighting large
fires involving chemicals. Use water spray to keep fire exposed containers cool. Determine
the need to evacuate or isolate the area according to your local emergency plan.

Unusual Fire Hazards:

None.

6. ACCIDENTAL RELEASE MEASURESDOW CORNING CORPORATION
Material Safety Data Sheet
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Containment/Clean up:

Observe all personal protection equipment recommendations described in Sections 5 and 8.
Wipe up or scrape up and contain for salvage or disposal. Materials in contact with water,
moisture, acids or bases have the potential to generate hydrogen gas. Recovered material
should be stored in a vented container. Clean area as appropriate since spilled materials,
even in small quantities, may present a slip hazard. Final cleaning may require use of steam,solvents or detergents. Dispose of saturated absorbant or cleaning materials appropriately,
since spontaneous heating may occur. Local, state and federal laws and regulations may
apply to releases and disposal of this material, as well as those materials and items employedin the cleanup of releases. You will need to determine which federal, state and local laws andregulations are applicable. Sections 13 and 15 of this MSDS provide information regarding
certain federal and state requirements.

Note: See section 8 for Personal Protective Equipment for Spills. Call (989) 496-5900, if additional information isrequired.

7. HANDLING AND STORAGE
Use with adequate ventilation. Avoid eye contact. Avoid breathing vapor. Keep container closed.
Product may evolve minute quantities of flammable hydrogen gas which can accumulate. Adequately ventilate tomaintain vapors well below flammability limits and exposure guidelines. Do not repackage. Do not store in glass
containers which may shatter due to pressure build up. Clogged container vents may increase pressure build up. Keep
container closed and store away from water or moisture.

8. EXPOSURE CONTROLS / PERSONAL PROTECTION
Component Exposure Limits
There are no components with workplace exposure limits.
Engineering Controls
Local Ventilation:
General Ventilation:

Recommended.
Recommended.

Personal Protective Equipment for Routine Handling
Eyes:

Use proper protection - safety glasses as a minimum.

Skin:

Washing at mealtime and end of shift is adequate.

Suitable Gloves:

Butyl Rubber. Neoprene Rubber(R). Nitrile Rubber.

Inhalation:

No respiratory protection should be needed.

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Suitable Respirator:

None should be needed.

Personal Protective Equipment for Spills
Eyes:

Use full face respirator.

Skin:

Washing at mealtime and end of shift is adequate.

Inhalation/Suitable
Respirator:

No respiratory protection should be needed.

Precautionary Measures:

Avoid eye contact. Avoid breathing vapor. Keep container closed. Use reasonable care.

Note: These precautions are for room temperature handling. Use at elevated temperature or aerosol/spray applications may require
added precautions.

9. PHYSICAL AND CHEMICAL PROPERTIES
Physical Form: Grease
Color: Gray
Odor: Slight odor
Specific Gravity @ 25°C: 3.4
Viscosity: Not determined.
Freezing/Melting Point: Not determined.
Boiling Point: Not determined.
Vapor Pressure @ 25°C: Not determined.
Vapor Density: Not determined.
Solubility in Water: Not determined.
pH: Not determined.
Volatile Content: Not determined.
Flash Point: Not applicable.
Autoignition Temperature: Not determined.
Flammability Limits in Air: Not determined.
Note: The above information is not intended for use in preparing product specifications. Contact Dow Corning before writingspecifications.

10. STABILITY AND REACTIVITY
Chemical Stability:

Stable.

HazardousPolymerization:
Conditions to Avoid:

Hazardous polymerization will not occur.

Materials to Avoid:

Oxidizing material can cause a reaction.

None.

Hazardous Decomposition Products

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Thermal breakdown of this product during fire or very high heat conditions may evolve the following decomposition
products: Carbon oxides and traces of incompletely burned carbon compounds. Silicon dioxide. Formaldehyde.
Hydrogen. Metal oxides.

11. TOXICOLOGICAL INFORMATION
Component Toxicology Information
Inhalation of fumes may result in metal fume fever, a flu-like illness with symptoms of metallic taste, fever and chills,aches, chest tightness, and cough.

This material contains zinc oxide. Zinc oxide produced adverse developmental effects when fed to rats at 200 mg/kg/day
for 21 days prior to mating and throughout pregnancy. However, no adverse effects were observed at a dose of 100
mg/kg/day for the same duration.

Special Hazard Information on Components
No known applicable information.

12. ECOLOGICAL INFORMATION
Environmental Fate and Distribution
Complete information is not yet available.
Environmental Effects
Complete information is not yet available.
Fate and Effects in Waste Water Treatment Plants
Complete information is not yet available.

Hazard Parameters (LC50 or EC50)
Acute Aquatic Toxicity (mg/L)
Acute Terrestrial Toxicity

Ecotoxicity Classification CriteriaHigh
Medium<=1>1 and <=100<=100>100 and <= 2000

Low>100>2000

This table is adapted from "Environmental Toxicology and Risk Assessment", ASTM STP 1179, p.34, 1993.
This table can be used to classify the ecotoxicity of this product when ecotoxicity data is listed above. Please read the other information presented in thesection concerning the overall ecological safety of this material.

13. DISPOSAL CONSIDERATIONSDOW CORNING CORPORATION
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RCRA Hazard Class (40 CFR 261)
When a decision is made to discard this material, as received, is it classified as a hazardous waste? Yes
Characteristic Waste:
Reactive:

D003

State or local laws may impose additional regulatory requirements regarding disposal.Call (989) 496-6315, if additional
information is required.
14. TRANSPORT INFORMATIONDOT Road Shipment Information (49 CFR 172.101)
Not subject to DOT.
Ocean Shipment (IMDG)
Not subject to IMDG code.
Air Shipment (IATA)
Not subject to IATA regulations.
Call Dow Corning Transportation, (989) 496-8577, if additional information is required.

15. REGULATORY INFORMATION
Contents of this MSDS comply with the OSHA Hazard Communication Standard 29 CFR 1910.1200.
TSCA Status:

All chemical substances in this material are included on or exempted from listing on the TSCA
Inventory of Chemical Substances.
The United States Environmental Protection Agency (USEPA) has established a Significant
New Use Rule (SNUR) for the proprietary metal oxide in this product at 40 CFR 721.10044. For
further assistance, contact the Regulatory Compliance Department of Dow Corning Corporation.

EPA SARA Title III Chemical Listings
Section 302 Extremely Hazardous Substances (40 CFR 355):
None.
Section 304 CERCLA Hazardous Substances (40 CFR 302):
None.

Section 311/312 Hazard Class (40 CFR 370):

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DOW CORNING(R) TC-5021 THERMALLY CONDUCTIVE COMPOUND
Acute:
Chronic:
Fire:
Pressure:
Reactive:

No
No
No
No
Yes

Section 313 Toxic Chemicals (40 CFR 372):
None present or none present in regulated quantities.
Note: Chemicals are listed under the 313 Toxic Chemicals section only if they meet or exceed a reporting threshold.

Supplemental State Compliance Information
California
Warning: This product contains the following chemical(s) listed by the State of California under the Safe Drinking Water
and Toxic Enforcement Act of 1986 (Proposition 65) as being known to cause cancer, birth defects or otherreproductive harm.
None known.
Massachusetts
No ingredient regulated by MA Right-to-Know Law present.
New Jersey
CAS Number

Wt %Component NameNJ TSRN
14962700-626
9P
NJ TSRN
14962700-653
0P134971-32-7> 60.0

Metal oxide

15.0 - 40.0

Treated oxide

3.0 - 7.0

Dimethyl, Methyldecyl Siloxane

Wt %Component Name

Trade Secret> 60.0

Metal oxide

Trade Secret15.0 - 40.0

Treated oxide

134971-32-7

3.0 - 7.0

Dimethyl, Methyldecyl Siloxane

Pennsylvania
CAS Number

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DOW CORNING(R) TC-5021 THERMALLY CONDUCTIVE COMPOUND
16. OTHER INFORMATION
Prepared by: Dow Corning Corporation
These data are offered in good faith as typical values and not as product specifications. No warranty, either expressed orimplied, is hereby made. The recommended industrial hygiene and safe handling procedures are believed to be generally
applicable. However, each user should review these recommendations in the specific context of the intended use anddetermine whether they are appropriate.
(R) indicates Registered Trademark