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CAS No.: 6843-66-9
Formula: C14H16O2Si
Exact Mass: 244.09200
Molecular Weight: 244.36100
PSA: 18.46000
LogP: 1.53580
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Dimethoxydiphenylsilane 6843-66-9 MSDS

Section 1: Product Identification
   Chemical Name:       Diphenyldimethoxysilane, min.97%    
   CAS Registry Number:       6843-66-9    
   Formula:       (C6H5)2Si(OCH3)2    
   EINECS Number:       229-929-1    
   Chemical Family:       organosilicon compounds    
   Synonym:       Dimethoxydiphenylsilane    

Section 2: Composition and Information on Ingredients
   Ingredient       CAS Number       Percent       ACGIH (TWA)       OSHA (PEL)    
   Title Compound       6843-66-9       100%       no data       no data    

Section 3: Hazards Identification
   Volatile liquid may cause mild irritation of skin, eyes, and respiratory system. Harmful by inhalation. Methanol
   Emergency Overview:
   vapor, in large amounts, may cause blindness, intoxication, dizziness, and coma.
   Primary Routes of Exposure:       Inhalation, ingestion, contact with skin and eyes.    
   Methanol: may cause severe irritation of the eyes. Delayed blindness may occur through atrophy of the optic
   Eye Contact:
   Skin Contact:       Dehydrating agent. Liquid may cause mild irritation of the skin.    
   Harmful by inhalation. Methanol vapor may be irritating to the respiratory tract and cause headache,
   dizziness, coma, and blindness.
   Ingestion will produce methanol which in large amounts may cause nausea, vomiting, headache, coma and
   Methanol may irritate the skin, eyes and respiratory tract. Harmful by inhalation. Large amounts cause blurred
   Acute Health Affects:
   vision, blindness, intoxication, dizziness, headache, nausea, coma and death.
   Siloxane polymer resulting from hydrolysis may evolve small amounts of formaldehyde with prolonged heating
   Chronic Health Affects:
   over 300 F in air. Formaldehyde is a skin and respiratory sensitized, irritant, and potential cancer hazard.
   NTP:       No    
   IARC:       No    
   OSHA:       No    

SECTION 4: First Aid Measures
   Immediately flush the eyes with copious amounts of water for at least 10-15 minutes. A victim may need
   Eye Exposure:
   assistance in keeping their eye lids open. Get immediate medical attention.
   Wash the affected area with soap and water. Remove contaminated clothes if necessary. Seek medical
   Skin Exposure:
   assistance if irritation persists.
   Remove the victim to fresh air. Closely monitor the victim for signs of respiratory problems, such as difficulty
   in breathing, coughing, wheezing, or pain. In such cases seek immediate medical assistance.
   Ingestion:       Seek medical attention immediately. Keep the victim calm. Give the victim water (only if conscious).    

SECTION 5: Fire Fighting Measures
   Flash Point:       250°F    
   Autoignition Temperature:       no data    
   Explosion Limits:       no data    
   Extinguishing Medium:       carbon dioxide, dry powder or foam    
   If involved in a fire, fire fighters should be equipped with a NIOSH approved positive pressure self-contained
   Special Fire Fighting Procedures:
   breathing apparatus and full protective clothing.
   Hazardous Combustion and       If involved in a fire this material may emit toxic organic fumes and silica dust.    
   Decomposion Products:
   Unusual Fire or Explosion Hazards: No unusual fire or explosion hazards.

SECTION 6: Accidental Release Measures
   Avoid contact with water. Small spills may be adsorbed into diatomaceous earth, sand, or other suitable
   Spill and Leak Procedures:
   adsorbent, and swept up.

SECTION 7: Handling and Storage
   Store in a tightly sealed container in a dry place. If container is left open, product may adsorb moisture from
   Handling and Storage:
   the atmosphere and release ethanol vapor.

SECTION 8: Exposure Controls and Personal Protection
   Eye Protection:       Always wear approved safety glasses when handling a chemical substance in the laboratory.    
   Skin Protection:       Wear protective clothing and gloves.    
   Ventilation:       Material may form a vapor upon exposure to air. if possible, handle the material in an efficient fume hood.    
   If ventilation is not available a respirator should be worn. The use of respirators requires a Respirator
   Protection Program to be in compliance with 29 CFR 1910.134.
   Ventilation:       Material may form a vapor upon exposure to air. if possible, handle the material in an efficient fume hood.    
   Additional Protection:       No additional protection required.    

SECTION 9: Physical and Chemical Properties
   Color and Form:       colorless liq.    
   Molecular Weight:       244.36    
   Melting Point:       no data    
   Boiling Point:       161°C/15 mm    
   Vapor Pressure:       no data    
   Specific Gravity:       1.0771    
   Odor:       no data    
   Solubility in Water:       reacts with water    

SECTION 10: Stability and Reactivity
   Stability:       moisture sensitive    
   Hazardous Polymerization:       no hazardous polymerization    
   Conditions to Avoid:       contact with moisture    
   Incompatibility:       oxidizing agents and halogens    
   Decomposition Products:       Carbon dioxide, carbon monoxide, organic vapors, soot, and metal oxides and carbonates.    

SECTION 11: Toxicological Information
   RTECS Data:       Inhalation (rat); LC: >42mg/m3/4H.    
   Carcinogenic Effects:       No data available    
   Mutagenic Effects:       No data available    
   Tetratogenic Effects:       No data available    

SECTION 12: Ecological Information
   Ecological Information:       No information available    

SECTION 13: Disposal Considerations
   Disposal:       Dispose of according to local, state and federal regulations.    

SECTION 14: Transportation
   Shipping Name (CFR):       Non-hazardous    
   Hazard Class (CFR):       NA    
   Additional Hazard Class (CFR):       NA    
   Packaging Group (CFR):       NA    
   UN ID Number (CFR):       NA    
   Shipping Name (IATA):       Non-hazardous    
   Hazard Class (IATA):       NA    
   Additional Hazard Class (IATA):       NA    
   Packaging Group (IATA):       NA    
   UN ID Number (IATA):       NA    

SECTION 15: Regulatory Information
   TSCA:       Listed in the TSCA inventory.    
   SARA (Title 313):       Not reportable under SARA section 313.    
   Second Ingredient:       none    


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