DOW CORNING CORPORATION
Material Safety Data Sheet
Page: 1 of 8
Version: 2.0
Revision Date: 2005/01/24
DOW CORNING(R) 3140 RTV COATING
1. IDENTIFICATION OF THE SUBSTANCE AND OF THE COMPANY
24 Hour Emergency Telephone: (989) 496-5900
Dow Corning Corporation
South Saginaw Road Customer Service: (989) 496-6000
Midland, Michigan 48686 Product Disposal Information: (989) 496-6315
CHEMTREC: (800) 424-9300
MSDS No.: 01015788 Revision Date: 2005/01/24
Generic Description: Silicone elastomer
Physical Form: Liquid
Color: Translucent white
Odor: Slight odor
NFPA Profile: Health 1 Flammability 1 Instability/Reactivity 0
Note: NFPA = National Fire Protection Association
2. OSHA HAZARDOUS COMPONENTS
CAS Number Wt % Component Name
68909-20-6 10.0 - 30.0 Trimethylated silica
1185-55-3 5.0 - 10.0 Methyltrimethoxysilane
The above components are hazardous as defined in 29 CFR 1910.1200.
3. HAZARDS IDENTIFICATION
Potential Health Effects
Acute Effects
Eye: Direct contact may cause mild irritation.
Skin: No significant irritation expected from a single short-term exposure.
Inhalation: Vapor may irritate nose and throat. Vapor overexposure may cause drowsiness.
Oral: Low ingestion hazard in normal use.
Prolonged/Repeated Exposure Effects
Skin: Repeated or prolonged exposure may cause irritation.
Inhalation: Product generates methyl alcohol which may cause blindness and damage to nervous
system.
DOW CORNING CORPORATION
Material Safety Data Sheet
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Version: 2.0
Revision Date: 2005/01/24
DOW CORNING(R) 3140 RTV COATING
Oral: Product generates methyl alcohol which may cause blindness and possibly death if
swallowed.
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,
component data and/or expert review of the product. Please refer to Section 11 for the detailed toxicology information.
4. FIRST AID MEASURES
Eye: Immediately flush with water for 15 minutes.
Skin: No first aid should be needed.
Inhalation: Remove to fresh air. Get medical attention if ill effects persist.
Oral: Get medical attention.
Comments: Treat same as methyl alcohol poisoning.
5. FIRE FIGHTING MEASURES
Flash Point: > 214 掳F / > 101.1 掳C (Closed Cup)
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. Determine the need to evacuate or isolate the area according to
your local emergency plan. Use water spray to keep fire exposed containers cool.
Unusual Fire Hazards: None.
Hazardous Decomposition Products
Thermal breakdown of this product during fire or very high heat conditions may evolve the following hazardous
decomposition products: Carbon oxides and traces of incompletely burned carbon compounds. Silicon dioxide.
Formaldehyde. Nitrogen oxides. Metal oxides.
DOW CORNING CORPORATION
Material Safety Data Sheet
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Version: 2.0
Revision Date: 2005/01/24
DOW CORNING(R) 3140 RTV COATING
6. ACCIDENTAL RELEASE MEASURES
Containment/Clean up: Determine whether to evacuate or isolate the area according to your local emergency plan.
Observe all personal protection equipment recommendations described in Sections 5 and 8.
For large spills, provide diking or other appropriate containment to keep material from
spreading. If diked material can be pumped, store recovered material in appropriate
container. Clean up remaining materials from spill with suitable absorbant. 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 employed in the cleanup of releases. You will need to determine
which federal, state and local laws and regulations 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 is
required.
7. HANDLING AND STORAGE
Use with adequate ventilation. Product evolves flammable methyl alcohol when exposed to water or humid air. Provide
ventilation during use to control exposure within Section 8 guidelines or use air-supplied or self-contained breathing
apparatus. Avoid eye contact. Do not breathe vapor. Keep container closed. Do not take internally.
Keep container closed and store away from water or moisture.
8. EXPOSURE CONTROLS / PERSONAL PROTECTION
Component Exposure Limits
CAS Number Component Name Exposure Limits
68909-20-6 Trimethylated silica Dow Corning guide: 5 mg/m3 Ceiling (as dust).
1185-55-3 Methyltrimethoxysilane Dow Corning guide: TWA 50 ppm. Also see methyl alcohol
comments.
Methyl alcohol forms on contact with water or humid air. Provide adequate ventilation to control exposures within
guidelines of OSHA PEL: TWA 200 ppm and ACGIH TLV-skin: TWA 200 ppm, STEL 250 ppm.
Engineering Controls
Local Ventilation: Recommended.
General Ventilation: Recommended.
Personal Protective Equipment for Routine Handling
Eyes: Use proper protection - safety glasses as a minimum.
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Material Safety Data Sheet
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Version: 2.0
Revision Date: 2005/01/24
DOW CORNING(R) 3140 RTV COATING
Skin: Washing at mealtime and end of shift is adequate.
Suitable Gloves: No special protection needed.
Inhalation: Use respiratory protection unless adequate local exhaust ventilation is provided or exposure
assessment demonstrates that exposures are within recommended exposure guidelines. IH
personnel can assist in judging the adequacy of existing engineering controls.
Suitable Respirator: General and local exhaust ventilation is recommended to maintain vapor exposures below
recommended limits. Where concentrations are above recommended limits or are unknown,
appropriate respiratory protection should be worn. Follow OSHA respirator regulations (29
CFR 1910.134) and use NIOSH/MSHA approved respirators.
Personal Protective Equipment for Spills
Eyes: Use full face respirator.
Skin: Washing at mealtime and end of shift is adequate.
Inhalation/Suitable Respiratory protection recommended. Follow OSHA Respirator Regulations (29 CFR
Respirator: 1910.134) and use NIOSH/MHSA approved respirators. Protection provided by air purifying
respirators against exposure to any hazardous chemical is limited. Use a positive pressure air
supplied respirator if there is any potential for uncontrolled release, exposure levels are
unknown, or any other circumstance where air purifying respirators may not provide adequate
protection.
Precautionary Measures: Avoid eye contact. Do not breathe vapor. Keep container closed. Do not take internally. Use
reasonable care.
Comments: Product evolves flammable methyl alcohol when exposed to water or humid air. Provide
ventilation during use to control exposure within Section 8 guidelines or use air-supplied or
self-contained breathing apparatus.
When heated to temperatures above 180 degrees C in the presence of air, product can form
formaldehyde vapors. Formaldehyde is a potential cancer hazard, a known skin and
respiratory sensitizer, and an irritant to the eyes, nose, throat, skin, and digestive system.
Safe handling conditions may be maintained by keeping vapor concentrations within the
OSHA Permissible Exposure Limit for formaldehyde.
Note: These precautions are for room temperature handling. Use at elevated temperature or aerosol/spray applications may require
added precautions. For further information regarding aerosol inhalation toxicity, please refer to the guidance document regarding the
use of silicone-based materials in aerosol applications that has been developed by the silicone industry (www.SEHSC.com) or contact
the Dow Corning customer service group.
9. PHYSICAL AND CHEMICAL PROPERTIES
Physical Form: Liquid
Color: Translucent white
Odor: Slight odor
Specific Gravity @ 25掳C: 1.05
DOW CORNING CORPORATION
Material Safety Data Sheet
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Version: 2.0
Revision Date: 2005/01/24
DOW CORNING(R) 3140 RTV COATING
Viscosity: 300 Poise
Freezing/Melting Point: Not determined.
Boiling Point: > 65 掳C
Vapor Pressure @ 25掳C: Not determined.
Vapor Density: Not determined.
Solubility in Water: Not determined.
pH: Not determined.
Volatile Content: Not determined.
Note: The above information is not intended for use in preparing product specifications. Contact Dow Corning before writing
specifications.
10. STABILITY AND REACTIVITY
Chemical Stability: Stable.
Hazardous Hazardous polymerization will not occur.
Polymerization:
Conditions to Avoid: None.
Materials to Avoid: Oxidizing material can cause a reaction. Water, moisture, or humid air can cause hazardous
vapors to form as described in Section 8.
11. TOXICOLOGICAL INFORMATION
Special Hazard Information on Components
No known applicable information.
12. ECOLOGICAL INFORMATION
Environmental Fate and Distribution
Air: This product is a solid consisting of a high molecular weight silicone polymer and other solid
materials. Unless milled to produce a dust or particles, it is unlikely to give rise to atmospheric
contamination.
Water: This product is a solid which is completely insoluble in water. As the specific gravity is >1, it
will sink to the bottom of the water course.
Soil: This product will enter the terrestrial environment if, as a component of municipal or industrial
solid waste the product is landfilled. It is unlikely that further significant transformation of the
product will occur.
Degradation: High molecular weight polymer which is amenable to recycling. The product is not
biodegradable. The product is removed >80% during the sewage treatment process.
Environmental Effects
DOW CORNING CORPORATION
Material Safety Data Sheet
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Version: 2.0
Revision Date: 2005/01/24
DOW CORNING(R) 3140 RTV COATING
Toxicity to Water This product has low water solubility and should not present a risk to aquatic organisms.
Organisms:
Toxicity to Soil Organisms: This product is a solid and does not contain significant concentrations of water soluble
constituents that may be leached from the product. It is therefore not likely to present a danger
to terrestrial organisms.
Bioaccumulation: This product is a solid which is not soluble in water and if ingested will not be absorbed.
Fate and Effects in Waste Water Treatment Plants
This product is a solid rubber type material which is unlikely to have any adverse effect on bacteria.
Ecotoxicity Classification Criteria
Hazard Parameters (LC50 or EC50) High Medium Low
Acute Aquatic Toxicity (mg/L) <=1 >1 and <=100 >100
Acute Terrestrial Toxicity <=100 >100 and <= 2000 >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 the
section concerning the overall ecological safety of this material.
13. DISPOSAL CONSIDERATIONS
RCRA Hazard Class (40 CFR 261)
When a decision is made to discard this material, as received, is it classified as a hazardous waste? No
State or local laws may impose additional regulatory requirements regarding disposal.
Call (989) 496-6315, if additional information is required.
14. TRANSPORT INFORMATION
DOT 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.
15. REGULATORY INFORMATION
Contents of this MSDS comply with the OSHA Hazard Communication Standard 29 CFR 1910.1200.
DOW CORNING CORPORATION
Material Safety Data Sheet
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Version: 2.0
Revision Date: 2005/01/24
DOW CORNING(R) 3140 RTV COATING
TSCA Status: All chemical substances in this material are included on or exempted from listing on the TSCA
Inventory of Chemical Substances.
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):
Acute: Yes
Chronic: Yes
Fire: No
Pressure: No
Reactive: No
Section 313 Toxic Chemicals (40 CFR 372):
None present or none present in regulated quantities.
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 other
reproductive harm.
None known.
Massachusetts
No ingredient regulated by MA Right-to-Know Law present.
New Jersey
CAS Number Wt % Component Name
70131-67-8 > 60.0 Dimethyl siloxane, hydroxy-terminated
68909-20-6 10.0 - 30.0 Trimethylated silica
1185-55-3 5.0 - 10.0 Methyltrimethoxysilane
Pennsylvania
DOW CORNING CORPORATION
Material Safety Data Sheet
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Version: 2.0
Revision Date: 2005/01/24
DOW CORNING(R) 3140 RTV COATING
CAS Number Wt % Component Name
70131-67-8 > 60.0 Dimethyl siloxane, hydroxy-terminated
68909-20-6 10.0 - 30.0 Trimethylated silica
1185-55-3 5.0 - 10.0 Methyltrimethoxysilane
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 or
implied, 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 and
determine whether they are appropriate.
(R) indicates Registered Trademark
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