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Methyl silicate

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Synonyms & Trade Names
Methyl orthosilicate, Tetramethoxysilane, Tetramethyl ester of silicic acid, Tetramethyl silicate
CAS No.
681-84-5
RTECS No.
VV9800000
DOT ID & Guide
2606 155
Formula
(CH₃O)₄Si
Conversion
1 ppm = 6.23 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
TWA 1 ppm (6 mg/m3)
OSHA PEL
none See Appendix G
Measurement Methods
None available
See: NMAM or OSHA Methods
Physical Description
Clear, colorless liquid. [Note: A solid below 28°F.]
Molecular Weight
152.3
Boiling Point
250°F
Freezing Point
28°F
Solubility
Soluble
Vapor Pressure
(77°F): 12 mmHg
Ionization Potential
?
Specific Gravity
1.02
Flash Point
205°F
Upper Explosive Limit
?
Lower Explosive Limit
?
Class IIIB Combustible Liquid: Fl.P. at or above 200°F.
Incompatibilities & Reactivities
Oxidizers; hexafluorides of rhenium, molybdenum & tungsten
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, corneal damage (following even short-term exposure to the vapor); lung, kidney injury; pulmonary edema
Target Organs
Eyes, respiratory system, kidneys
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:Daily
Remove:When wet or contaminated
Change:No recommendation
Provide:Eyewash
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1188
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health