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Methyl formate																				Related Pages
Synonyms & Trade Names
			Methyl ester of formic acid, Methyl methanoate
CAS No.
			107-31-3
	RTECS No.
			LQ8925000
	DOT ID & Guide
			1243 129

FormulaHCOOCH3
	Conversion
			1 ppm = 2.46 mg/m3
	IDLH
			4500 ppmSee: 107313

Exposure Limits
			NIOSH RELTWA 100 ppm (250 mg/m3) ST 150 ppm (375 mg/m3)
					OSHA PEL TWA 100 ppm (250 mg/m3) See Appendix G
	Measurement Methods
			**NIOSH** S291 (II-5);**OSHA** PV2041
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless liquid with a pleasant odor.
					[Note: A gas above 89°F.]													
										
Molecular Weight60.1	
	Boiling Point89°F
	Freezing Point-148°F
	Solubility30%
	Vapor Pressure476 mmHg
	Ionization Potential10.82 eV											
Specific Gravity0.98	
	Flash Point-2°F
	Upper Explosive Limit23%
	Lower Explosive Limit4.5%
Class IA Flammable Liquid: Fl.P. below 73°F and BP below 100°F.
Incompatibilities & Reactivities
			Strong oxidizers
					[Note: Reacts slowly with water to form methanol & formic acid.]
Exposure Routes
			inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, nose; chest tightness, dyspnea (breathing difficulty); visual disturbance; central nervous system depression; In Animals: pulmonary edema; narcosis
Target Organs
			Eyes, respiratory system, central nervous system
										
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
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH/OSHA****Up to 1000 ppm**: (APF = 10) Any supplied-air respirator***Up to 2500 ppm**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode***Up to 4500 ppm**: (APF = 50) Any self-contained breathing apparatus with a full facepiece(APF = 50) Any supplied-air respirator with a full facepiece**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 canisterAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0664

			
							

			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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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
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