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MSDS 
:
 Tetraethyl Orthosilicate
CAS 
:
 78-10-4
SYNONYMS 
:
 Ethyl silicate; Silicic acid, tetraethyl ester; TEOS; Tetraethyl     silicate; Tetraethoxysilane; Ethyl orthosilicate.
**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | 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 ****

MSDS Creation Date: 7/31/1998 Revision #4 Date: 6/07/2004

The information above is believed to be accurate and represents the best
information currently available to us. However, we make no warranty of
merchantability or any other warranty, express or implied, with respect to
such information, and we assume no liability resulting from its use. Users
should make their own investigations to determine the suitability of the
information for their particular purposes. In no way shall the company be
liable for any claims, losses, or damages of any third party or for lost
profits or any special, indirect, incidental, consequential or exemplary
damages, howsoever arising, even if the company has been advised of
the possibility of such damages.
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