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Methyl silicate																				Related Pages
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 RELTWA 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 Weight152.3	
	Boiling Point250°F
	Freezing Point28°F
	SolubilitySoluble
	Vapor Pressure(77°F): 12 mmHg
	Ionization Potential?											
Specific Gravity1.02	
	Flash Point205°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 NIOSH Pocket Guide to Chemical Hazards
Introduction
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Chemical Names, Synonyms and Trade Names
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CAS Numbers
RTECS Numbers
Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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