# NIOSH Pocket Guide to Chemical Hazards
Ethyl butyl ketone | CAS 106-35-4
CH3CH2CO[CH2]3CH3 | RTECS MJ5250000
Synonyms & Trade Names Butyl ethyl ketone, 3-Heptanone | DOT ID & Guide 1224 127
Exposure Limits | NIOSH REL: TWA 50 ppm (230 mg/m3)
OSHA PEL: TWA 50 ppm (230 mg/m3)
IDLH 1000 ppm | Conversion 1 ppm = 4.67 mg/m3
Physical Description Colorless liquid with a powerful, fruity odor.
MW: 114.2 | BP: 298°F | FRZ: -38°F | Sol: 1%
VP: 4 mmHg | IP: 9.02 eV |  | Sp.Gr: 0.82
Fl.P(oc): 115°F | UEL: ? | LEL: ? |
Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
Incompatibilities & Reactivities Oxidizers, acetaldehyde, perchloric acid
Measurement Methods NIOSH 1301; OSHA 7
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA Up to 500 ppm: (APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*/(APF = 10) Any supplied-air respirator* Up to 1000 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, skin, mucous membrane; headache, narcosis, coma; dermatitis
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION