# NIOSH Pocket Guide to Chemical Hazards
Cumene | CAS 98-82-8
C6H5CH(CH3)2 | RTECS GR8575000
Synonyms & Trade Names Cumol, Isopropyl benzene, 2-Phenyl propane | DOT ID & Guide 1918 130
Exposure Limits | NIOSH REL: TWA 50 ppm (245 mg/m3) [skin]
OSHA PEL: TWA 50 ppm (245 mg/m3) [skin]
IDLH 900 ppm [10%LEL] | Conversion 1 ppm = 4.92 mg/m3
Physical Description Colorless liquid with a sharp, penetrating, aromatic odor.
MW: 120.2 | BP: 306°F | FRZ: -141°F | Sol: Insoluble
VP: 8 mmHg | IP: 8.75 eV |  | Sp.Gr: 0.86
Fl.P: 96°F | UEL: 6.5% | LEL: 0.9% |
Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F.
Incompatibilities & Reactivities Oxidizers, nitric acid, sulfur acid [Note: Forms cumene hydroperoxide upon long exposure to air.]
Measurement Methods NIOSH 1501
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 promptly 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 900 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, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, mucous membrane; dermatitis; headache, narcosis, coma
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION