# NIOSH Pocket Guide to Chemical Hazards
Cyclohexanone | CAS 108-94-1
C6H10O | RTECS GW1050000
Synonyms & Trade Names Anone, Cyclohexyl ketone, Pimelic ketone | DOT ID & Guide 1915 127
Exposure Limits | NIOSH REL: TWA 25 ppm (100 mg/m3) [skin]
OSHA PEL†: TWA 50 ppm (200 mg/m3)
IDLH 700 ppm | Conversion 1 ppm = 4.02 mg/m3
Physical Description Water-white to pale-yellow liquid with a peppermint- or acetone-like odor.
MW: 98.2 | BP: 312°F | FRZ: -49°F | Sol: 15%
VP: 5 mmHg | IP: 9.14 eV |  | Sp.Gr: 0.95
Fl.P: 146°F | UEL: 9.4% | LEL(212°F): 1.1% |
Class IIIA Combustible Liquid: Fl.P. at or above 140°F and below 200°F.
Incompatibilities & Reactivities Oxidizers, nitric acid
Measurement Methods NIOSH 1300; OSHA 1
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 promptly Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH Up to 625 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)£ Up to 700 ppm: (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 powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s)£/(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, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, mucous membrane; headache; narcosis, coma; dermatitis; in animals: liver, kidney damage
Target Organs Eyes, skin, respiratory system, central nervous system, liver, kidneys
See also: INTRODUCTION