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Ethyl silicate |
CAS 78-10-4 | ||
(C2H5)4SiO4 |
RTECS VV9450000 | ||
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Synonyms & Trade Names Ethyl orthosilicate, Ethyl silicate (condensed), Tetraethoxysilane, Tetraethyl orthosilicate, Tetraethyl silicate |
DOT ID & Guide |
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Exposure
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NIOSH REL: TWA 10 ppm (85 mg/m3) | ||
| OSHA PEL†: TWA 100 ppm (850 mg/m3) | |||
| IDLH 700 ppm See: 78104 | Conversion 1 ppm = 8.52 mg/m3 | ||
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Physical Description Colorless liquid with a sharp, alcohol-like odor. |
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MW: 208.3 |
BP: 336°F |
FRZ: -117°F |
Sol: Reacts |
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VP: 1 mmHg |
IP: 9.77 eV |
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Sp.Gr: 0.93 |
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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. | |||
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Incompatibilities & Reactivities Strong oxidizers, water [Note: Reacts with water to form a silicone adhesive (a milky-white mass).] |
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Measurement Methods NIOSH S264 (II-3) See: NMAM or OSHA Methods |
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Personal Protection & Sanitation (See protection) Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation |
First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash promptly Breathing: Respiratory support Swallow: Medical attention immediately |
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Important additional information about respirator selection 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 |
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| 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 | |
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Target Organs
Eyes, respiratory system, liver, kidneys, blood, skin |
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| See also: INTRODUCTION See ICSC CARD: 0333 See MEDICAL TESTS: 0100 |