NIOSH Pocket Guide to Chemical Hazards

Ethyl formate CAS 109-94-4
CH3CH2OCHO RTECS LQ8400000
Synonyms & Trade Names
Ethyl ester of formic acid, Ethyl methanoate
DOT ID & Guide
1190 129
Exposure
Limits
NIOSH REL: TWA 100 ppm (300 mg/m3)
OSHA PEL: TWA 100 ppm (300 mg/m3)
IDLH 1500 ppm Conversion 1 ppm = 3.03 mg/m3
Physical Description
Colorless liquid with a fruity odor.
MW: 74.1
BP: 130°F
FRZ: -113°F
Sol(64°F): 9%
VP: 200 mmHg
IP: 10.61 eV

Sp.Gr: 0.92
Fl.P: -4°F
UEL: 16.0%
LEL: 2.8%

Class IB Flammable Liquid: Fl.P. below 73F and BP at or above 100F.
Incompatibilities & Reactivities
Nitrates; strong oxidizers, alkalis & acids [Note: Decomposes slowly in water to form ethyl alcohol and formic acid.]
Measurement Methods
NIOSH 1452; OSHA 7
Personal Protection & Sanitation
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: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA
Up to 1500 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode/(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)/(APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)/(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/(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 canister/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, upper respiratory system; in animals: narcosis
Target Organs Eyes, respiratory system, central nervous system
See also: INTRODUCTION