# NIOSH Pocket Guide to Chemical Hazards
Phenyl ether (vapor) | CAS 101-84-8
C6H5OC6H5 | RTECS KN8970000
Synonyms & Trade Names Diphenyl ether, Diphenyl oxide, Phenoxy benzene, Phenyl oxide | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 1 ppm (7 mg/m3)
OSHA PEL: TWA 1 ppm (7 mg/m3)
IDLH 100 ppm | Conversion 1 ppm = 6.96 mg/m3
Physical Description Colorless, crystalline solid or liquid (above 82°F) with a geranium-like odor.
MW: 170.2 | BP: 498°F | MLT: 82°F | Sol: Insoluble
VP(77°F): 0.02 mmHg | IP: 8.09 eV |  | Sp.Gr: 1.08
Fl.P: 239°F | UEL: 6.0% | LEL: 0.7% |
Combustible Solid Class IIIB Combustible Liquid
Incompatibilities & Reactivities Strong oxidizers
Measurement Methods NIOSH 1617; OSHA PV2022
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: Soap wash promptly Breathing: Respiratory support
Respirator Recommendations NIOSH/OSHA Up to 25 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) in combination with a dust and mist filter£ Up to 50 ppm: (APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s) in combination with a high-efficiency particulate filter/(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having a high-efficiency particulate filter/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Up to 100 ppm: (APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode 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 having a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin and/or eye contact
Symptoms Irritation eyes, nose, skin; nausea
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION