Ethyl silicate |
Synonyms & Trade Names Ethyl orthosilicate, Ethyl silicate (condensed), Tetraethoxysilane, Tetraethyl orthosilicate, Tetraethyl silicate |
CAS No. 78-10-4 |
RTECS No. VV9450000 |
DOT ID & Guide 1292 129 |
Formula(C2H5)4SiO4 |
Conversion 1 ppm = 8.52 mg/m3 |
IDLH 700 ppm
See: 78104 |
Exposure Limits NIOSH REL: TWA 10 ppm (85 mg/m3)
OSHA PEL†: TWA 100 ppm (850 mg/m3) |
Measurement Methods
NIOSH S264 (II-3)
See: NMAM or OSHA Methods |
Physical Description Colorless liquid with a sharp, alcohol-like odor. |
MW: 208.3 |
BP: 336°F |
FRZ: -117°F |
Sol: Reacts |
VP: 1 mmHg |
IP: 9.77 eV |
Sp.Gr: 0.93 |
Fl.P: 99°F |
UEL: ? |
LEL: ? |
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| Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F. |
Incompatibilities & Reactivities Strong oxidizers, water [Note: Reacts with water to form a silicone adhesive (a milky-white mass).] |
Exposure Routes inhalation, ingestion, skin and/or eye contact |
Symptoms irritation eyes, nose; in animals: lacrimation (discharge of tears); dyspnea (breathing difficulty), pulmonary edema; tremor, narcosis; liver, kidney damage; anemia |
Target Organs Eyes, respiratory system, liver, kidneys, blood, skin |
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Personal Protection/Sanitation (See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately |
Respirator Recommendations NIOSH Up to 100 ppm:
(APF = 10) Any supplied-air respirator* Up to 250 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode* Up to 500 ppm:
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece Up to 700 ppm:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0333
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