Ethyl silicate
|
CAS
78-10-4
|
(C2H5)4SiO4
|
RTECS
VV9450000
|
Synonyms & Trade Names
Ethyl orthosilicate, Ethyl silicate (condensed), Tetraethoxysilane, Tetraethyl orthosilicate, Tetraethyl silicate
|
DOT ID & Guide
|
Exposure
Limits
|
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
|
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: ?
|
|
|
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).]
|
Measurement Methods
NIOSH S264 (II-3)
See: NMAM or OSHA Methods |
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
|
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
|
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
|
|
See also: INTRODUCTION
See ICSC CARD: 0333 See MEDICAL TESTS: 0100
|
