Tetraethyl orthosilicate 78-10-4 MSDS
Name: Tetraethyl Orthosilicate Material Safety Data Sheet
Synonym: Ethyl silicate; Silicic acid, tetraethyl ester; TEOS; Tetraethyl silicate; Tetraethoxysilane; Ethyl orthosilicate
CAS: 78-10-4
Section 1 - Chemical Product   MSDS Name:Tetraethyl Orthosilicate Material Safety Data Sheet
Synonym:Ethyl silicate; Silicic acid, tetraethyl ester; TEOS; Tetraethyl silicate; Tetraethoxysilane; Ethyl orthosilicate

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
78-10-4 Tetraethyl orthosilicate >95 201-083-8
Hazard Symbols: XN
Risk Phrases: 10 36/37 20

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Flammable. Irritating to eyes and respiratory system. Harmful by inhalation.Moisture sensitive.
Potential Health Effects
Eye:
Causes severe eye irritation. Vapors cause eye irritation.
Skin:
Causes skin irritation. Prolonged and/or repeated contact may cause defatting of the skin and dermatitis.
Ingestion:
May cause irritation of the digestive tract. May cause effects similar to those for inhalation exposure.
Inhalation:
Causes respiratory tract irritation. May cause kidney damage. Can produce delayed pulmonary edema. Exposure to high concentrations may produce narcosis, nausea and loss of consciousness.
Chronic:
Prolonged or repeated skin contact may cause defatting and dermatitis.

Section 4 - FIRST AID MEASURES
  Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Skin:
Get medical aid. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
If victim is conscious and alert, give 2-4 cupfuls of milk or water.
Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation:
Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:

Section 5 - FIRE FIGHTING MEASURES
  General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Use water spray to keep fire-exposed containers cool. Flammable liquid and vapor. Vapors are heavier than air and may travel to a source of ignition and flash back. Vapors can spread along the ground and collect in low or confined areas.
Extinguishing Media:
For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog or alcohol-resistant foam.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Remove all sources of ignition.
Provide ventilation.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Keep away from heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Use only with adequate ventilation.
Storage:
Keep away from sources of ignition. Store in a tightly closed container. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels below recommended exposure limits. Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower.
Exposure Limits CAS# 78-10-4: United States OSHA: 100 ppm TWA; 850 mg/m3 TWA Belgium - TWA: 10 ppm VLE; 86 mg/m3 VLE France - VME: 10 ppm VME; 85 mg/m3 VME Germany: 20 ppm TWA; 170 mg/m3 TWA Japan: 10 ppm OEL; 85 mg/m3 OEL Malaysia: 10 ppm TWA; 85 mg/m3 TWA Netherlands: 10 ppm MAC; 85 mg/m3 MAC Russia: 20 mg/m3 TWA Spain: 10 ppm VLA-ED; 87 mg/m3 VLA-ED Spain: 30 ppm VLA-EC; 260 mg/m3 VLA-EC Personal Protective Equipment Eyes: Wear chemical splash goggles.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Liquid
Color: clear, colorless
Odor: alcohol-like
pH: Not available.
Vapor Pressure: 1 mm Hg @ 20 deg C
Viscosity: 1.79 cP 20 deg C
Boiling Point: 165-166 deg C
Freezing/Melting Point: -77 deg C
Autoignition Temperature: 260 deg C ( 500.00 deg F)
Flash Point: 37 deg C ( 98.60 deg F)
Explosion Limits, lower: 1.3%
Explosion Limits, upper: 23.0%
Decomposition Temperature: Not available.
Solubility in water: Negligible. Slowly hydrolyzes.
Specific Gravity/Density: 0.94 (water=1)
Molecular Formula: C8H20O4Si
Molecular Weight: 208.33

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures. Hydrolyzes slowly in water to form ethyl alcohol and milky white silicone polymer (adhesive).
Conditions to Avoid:
Ignition sources, moisture, excess heat.
Incompatibilities with Other Materials:
Strong oxidizing agents, strong acids.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide, silicon dioxide.
Hazardous Polymerization: Has not been reported.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 78-10-4: VV9450000 LD50/LC50:
CAS# 78-10-4: Draize test, rabbit, eye: 100 mg Mild; Draize test, rabbit, eye: 500 mg/24H Mild; Draize test, rabbit, skin: 500 mg/24H Moderate; Oral, rat: LD50 = 6270 mg/kg; Skin, rabbit: LD50 = 6300 uL/kg.
Carcinogenicity:
Tetraethyl orthosilicate - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
 

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: TETRAETHYL SILICATE
Hazard Class: 3
UN Number: 1292
Packing Group: III
IMO
Shipping Name: TETRAETHYL SILICATE
Hazard Class: 3.3
UN Number: 1292
Packing Group: III
RID/ADR
Shipping Name: TETRAETHYL SILICATE
Hazard Class: 3
UN Number: 1292
Packing group: III

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XN
Risk Phrases:
R 10 Flammable.
R 20 Harmful by inhalation.
R 36/37 Irritating to eyes and respiratory system.
Safety Phrases:
WGK (Water Danger/Protection)
CAS# 78-10-4: 1
Canada
CAS# 78-10-4 is listed on Canada's DSL List.
CAS# 78-10-4 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 78-10-4 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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