DOW CORNING CORPORATION
Material Safety Data Sheet
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DOW CORNING(R) CONSTRUCTION PRIMER P
1. IDENTIFICATION OF THE SUBSTANCE AND OF THE COMPANY
MSDS No.: 03282261 Revision Date: 2004/06/24
SUPPLIER: Product Information: (800) 248-2481
Product Safety: (888) 335-1331
Dow Corning Canada Inc. CANUTEC: (613) 996-6666
15-6400 Millcreek Drive, Suite 416
Mississauga, ON L5N 3E7
Canada
MANUFACTURER: 24 Hour Emergency Telephone: (989) 496-5900
Dow Corning Corporation
South Saginaw Road
Midland, Michigan 48686
WHMIS CLASSIFICATION: Class B, Division 2.
Class D, Division 2, Subdivision A.
Class D, Division 2, Subdivision B.
Material Usage: Surface primer
2. COMPOSITION / INFORMATION ON INGREDIENTS
CAS Number Wt % Component Name
108-88-3 40.0 - 70.0 Toluene
71-36-3 3.0 - 7.0 n-Butyl alcohol
1185-55-3 3.0 - 7.0 Methyltrimethoxysilane
The ingredients listed above are controlled products as defined in CPR, am. SOR/88-555.
3. EFFECTS OF OVEREXPOSURE
EMERGENCY OVERVIEW
Generic Description: Organosilane solution
Physical Form: Liquid
Colour: Colorless
Odour: Aromatic odour
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.
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POTENTIAL HEALTH EFFECTS
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Material Safety Data Sheet
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Acute Effects
Eye: Direct contact may cause severe irritation.
Skin: No significant irritation expected from a single short-term exposure.
Inhalation: Vapor may irritate nose and throat. Overexposure by inhalation may cause drowsiness,
dizziness, confusion or loss of coordination.
Oral: Aspiration of liquid while vomiting may injure lungs seriously. Overexposure by ingestion
may cause effects similar to those listed under repeated exposure.
Prolonged/Repeated Exposure Effects
Skin: Repeated or prolonged contact may cause defatting and drying of skin which may result
in skin irritation and dermatitis.
Inhalation: Overexposure by inhalation may injure the following organ(s):Nervous system. Kidneys.
Liver. Blood. Lungs.
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. Get medical attention.
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: Remove to fresh air. Get medical attention if ill effects persist.
Oral: Get immediate medical attention. Only induce vomiting at the instructions of a physician.
Never give anything by mouth to an unconscious person.
Comments: Treat according to person's condition and specifics of exposure.
5. FIRE FIGHTING MEASURES
Flash Point: 46.4 癋 / 8 癈 (Closed Cup)
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Autoignition Not available.
Temperature:
Flammability Limits in Air: Not available.
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: Vapors are heavier than air and may travel to a source of ignition and flash back. Static
electricity will accumulate and may ignite vapors. Prevent a possible fire hazard by
bonding and grounding or inert gas purge.
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. Acrylic monomers.
Silicon dioxide. Formaldehyde.
6. ACCIDENTAL RELEASE MEASURES
Containment/Clean up: Remove possible ignition sources. 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, provincial, 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.
Note: See section 8 for Personal Protective Equipment for Spills. Call Dow Corning Corporation, (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. Avoid skin contact. Avoid breathing vapor, mist, dust, or fumes. Keep
container closed. Do not take internally.
Static electricity will accumulate and may ignite vapors. Prevent a possible fire hazard by bonding and grounding or
inert gas purge. Keep container closed and away from heat, sparks, and flame. Keep container closed and store
away from water or moisture.
8. EXPOSURE CONTROLS / PERSONAL PROTECTION
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Component Exposure Limits
Consult local authorities for acceptable provincial values.
CAS Number Component Name Exposure Limits
108-88-3 Toluene OSHA PEL (final rule): 8-Hour TWA 200 ppm, Ceiling
300 ppm, 10 minutes maximum duration 500 ppm.
ACGIH TLV-skin: TWA 50 ppm.
LC50: 49 g/m3 - Inhalation Rat ; 4 Hrs
LD50: 636 mg/kg - Oral Rat
71-36-3 n-Butyl alcohol OSHA PEL (final rule): TWA 100 ppm, 300 mg/m3.
ACGIH TLV: TWA 20 ppm.
LC50: 8000 ppm - Inhalation Rat; 4 Hrs
LD50: 790 mg/kg - Oral Rat
1185-55-3 Methyltrimethoxysilane Dow Corning guide: TWA 50 ppm. Also see methyl
alcohol comments.
LD50: 12,500 mg/kg - Oral Rat
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 chemical worker's goggles.
Skin: Wash at mealtime and end of shift. Contaminated clothing and shoes should be removed
as soon as practical and thoroughly cleaned before reuse. Chemical protective gloves
are recommended.
Suitable Gloves: Butyl Rubber. Neoprene Rubber(R).
Inhalation: Use respiratory protection unless adequate local exhaust ventilation is provided or air
sampling data show exposures are within recommended exposure guidelines. Industrial
Hygiene 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 as
determined by air sampling or are unknown, appropriate respiratory protection should be
worn. Follow CSA Standard Z94.4-93 and use NIOSH/MHSA approved respirators.
Personal Protective Equipment for Spills
Eyes: Use full face respirator.
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Skin: Wash at mealtime and end of shift. Contaminated clothing and shoes should be removed
as soon as practical and thoroughly cleaned before reuse. Chemical protective gloves
are recommended.
Inhalation/Suitable Respiratory protection recommended. Follow CSA Standard Z94.4-93 and use
Respirator: 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. Avoid skin contact. Avoid breathing vapor, mist, dust, or fumes. 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.
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: Colorless
Odor: Aromatic odour
Odor Threshold: Not available.
Specific Gravity @ 25癈: 0.95
Viscosity: 200 cSt
Freezing/Melting Point: Not available.
Boiling Point: > 70 癈
Vapor Pressure @ 25癈: Not available.
Vapor Density: Not available.
Evaporation Rate: Not available.
Solubility in Water: Not available.
Coefficient of Water/Oil Not available.
Distribution:
pH: Not available.
Volatile Content: Not available.
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:
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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
Component Toxicology Information
Toxicology studies with laboratory animals and occupational evaluations with humans have found limited evidence
of birth defects, low birth weights and delayed growth in offspring resulting from repeated exposures to toluene
during pregnancy.
Special Hazard Information on Components
Reproductive Effects
CAS Number Wt % Component Name
108-88-3 40.0 - 70.0 Toluene Evidence of reproductive effects in
humans.
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.
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
Can be incinerated in accordance with local regulations.
Call local hazardous waste disposal company or provincial waste authorities for more information.
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14. TRANSPORT INFORMATION
Check product label for transportation information. Call Dow Corning Transportation, (989) 496-8577, if additional
information is required.
15. REGULATORY INFORMATION
This product has been classified in accordance with the hazard criteria of the CPR, and the MSDS contains all the
information required by the CPR.
WHMIS Class B, Division 2.
CLASSIFICATION: Class D, Division 2, Subdivision A.
Class D, Division 2, Subdivision B.
DSL STATUS: Consult your local Dow Corning office.
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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