Name:
Tetraethyl Orthosilicate 98%
Synonym:
Ethyl Silicate; Silicic Acid Tetraethyl Ester; TEOS, Tetraethyl Silicate; Tetraethoxysilane
CAS:
78-10-4
Section 1 - Chemical Product
MSDS Name:Tetraethyl Orthosilicate 98%
Synonym:Ethyl Silicate; Silicic Acid Tetraethyl Ester; TEOS, Tetraethyl Silicate; Tetraethoxysilane
Synonym:Ethyl Silicate; Silicic Acid Tetraethyl Ester; TEOS, Tetraethyl Silicate; Tetraethoxysilane
Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
| CAS# | Chemical Name | emsds | EINECS# |
| 78-10-4 | Tetraethyl Orthosilicate | 98% | 201-083-8 |
| Hazard Symbols: XN F Risk Phrases: 10 36/37 20 |
Section 3 - HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
Flammable. Irritating to eyes and respiratory system. Harmful by inhalation.
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 liver and kidney damage. May cause lung damage. Causes narcotic effects including headache, dizziness, weakness, unconsciousness, and possible death.
Chronic:
Prolonged or repeated skin contact may cause defatting and dermatitis.
Flammable. Irritating to eyes and respiratory system. Harmful by inhalation.
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 liver and kidney damage. May cause lung damage. Causes narcotic effects including headache, dizziness, weakness, unconsciousness, and possible death.
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 soap and 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 to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Get medical aid.
Notes to Physician:
Skin:
Get medical aid. Immediately flush skin with plenty of soap and 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 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. Vapors may form an explosive mixture with air.
Vapors can travel to a source of ignition and flash back. Water Reactive. Material will react with water and may release a flammable and/or toxic gas. Use water spray to keep fire-exposed containers cool. Flammable liquid and vapor. Vapors may be heavier than air.
They can spread along the ground and collect in low or confined areas. May be ignited by heat, sparks, and flame. Containers may explode when heated.
Extinguishing Media:
For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Use water spray to cool fire-exposed containers. For large fires, use water spray, fog or alcohol-resistant foam. Cool containers with flooding quantities of water until well after fire is out.
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors may form an explosive mixture with air.
Vapors can travel to a source of ignition and flash back. Water Reactive. Material will react with water and may release a flammable and/or toxic gas. Use water spray to keep fire-exposed containers cool. Flammable liquid and vapor. Vapors may be heavier than air.
They can spread along the ground and collect in low or confined areas. May be ignited by heat, sparks, and flame. Containers may explode when heated.
Extinguishing Media:
For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Use water spray to cool fire-exposed containers. For large fires, use water spray, fog or alcohol-resistant foam. Cool containers with flooding quantities of water until well after fire is out.
Section 6 - ACCIDENTAL RELEASE MEASURES
General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Remove all sources of ignition. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Do not use combustible materials such as saw dust. Use a spark-proof tool.
Provide ventilation. A vapor suppressing foam may be used to reduce vapors. Water spray may reduce vapor but may not prevent ignition in closed spaces.
Spills/Leaks:
Remove all sources of ignition. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Do not use combustible materials such as saw dust. Use a spark-proof tool.
Provide ventilation. A vapor suppressing foam may be used to reduce vapors. Water spray may reduce vapor but may not prevent ignition in closed spaces.
Section 7 - HANDLING and STORAGE
Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well-ventilated area. 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.
Avoid contact with 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.
Storage:
Keep away from heat, sparks, and flame. 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. Flammables-area.
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well-ventilated area. 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.
Avoid contact with 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.
Storage:
Keep away from heat, sparks, and flame. 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. Flammables-area.
Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
Engineering Controls:
Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure limits.
Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHAs eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
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 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure limits.
Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHAs eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
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 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
Physical State: Liquid
Appearance: colourless
Odor: sharp odor - alcohol-like
pH: Not available.
Vapor Pressure: 1 mm Hg @ 20C
Viscosity: 1.79 cP 20 C
Boiling Point: 165-166C
Freezing/Melting Point: -77 deg C
Autoignition Temperature: Not available.
Flash Point: 99 deg F ( 37.22 deg C)
Explosion Limits, lower: 1.3
Explosion Limits, upper: 23.0
Decomposition Temperature: Not available.
Solubility in water: Insoluble in water.
Specific Gravity/Density: 0.94 (water=1)
Molecular Formula: C8H20O4Si
Molecular Weight: 208.2231
Section 10 - STABILITY AND REACTIVITY
Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Incompatible materials, ignition sources, excess heat, exposure to moist air or water.
Incompatibilities with Other Materials:
Strong oxidizing agents, reacts with water to form a silicone adhesive.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide, silicon oxide.
Hazardous Polymerization: Has not been reported.
Stable under normal temperatures and pressures.
Conditions to Avoid:
Incompatible materials, ignition sources, excess heat, exposure to moist air or water.
Incompatibilities with Other Materials:
Strong oxidizing agents, reacts with water to form a silicone adhesive.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide, silicon oxide.
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, NIOSH, NTP, or OSHA.
See actual entry in RTECS for complete information.
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, NIOSH, NTP, or OSHA.
See actual entry in RTECS for complete information.
Section 12 - ECOLOGICAL INFORMATION
Other No information available.
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
Dangerous Goods Code: 3(31C)
UN Number: 1292
Section 15 - REGULATORY INFORMATION
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XN F
Risk Phrases:
R 10 Flammable.
R 36/37 Irritating to eyes and respiratory system.
R 20 Harmful by inhalation.
Safety Phrases:
S 24/25 Avoid contact with skin and eyes.
WGK (Water Danger/Protection)
CAS# 78-10-4: 1
United Kingdom Occupational Exposure Limits
CAS# 78-10-4: OES-United Kingdom, TWA 10 ppm TWA; 87 mg/m3 TWA
CAS# 78-10-4: OES-United Kingdom, STEL 30 ppm STEL; 260 mg/m3 STEL
Canada
CAS# 78-10-4 is listed on Canadas DSL List.
CAS# 78-10-4 is listed on Canadas Ingredient Disclosure List.
Exposure Limits
CAS# 78-10-4: OEL-AUSTRALIA:TWA 10 ppm (85 mg/m3)
OEL-BELGIUM:TWA 10 ppm (85 mg/m3)
OEL-DENMARK:TWA 10 ppm (85 mg/m3)
OEL-FINLAND:TWA 10 ppm (85 mg/m3);STEL 20 ppm (17 mg/m3)
OEL-FRANCE:TWA 10 ppm (85 mg/m3)
OEL-GERMANY:TWA 100 ppm (850 mg/m3)
OEL-THE NETHERLANDS:TWA 10 ppm (85 mg/m3)
OEL-THE PHILIPPINES:TWA 100 ppm (850 mg/m3)
OEL-POLAND:TWA 80 mg/m3
OEL-RUSSIA:STEL 20 mg/m3
OEL-SWITZERLAND:TWA 10 ppm (85 mg/m3)
OEL-TURKEY:TWA 100 ppm (850 mg/m3)
OEL-UNITED KINGDOM:TWA 10 ppm (85 mg/m3);STEL 30 ppm (255 mg/m3)
OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV
OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGI TLV
US FEDERAL
TSCA
CAS# 78-10-4 is listed on the TSCA inventory.
