Synonyms & Trade Names1,4-Benzoquinone, p-Benzoquinone, 1,4-Cyclohexadiene dioxide, p-Quinone
Conversion1 ppm = 4.42 mg/m3
NIOSH RELTWA 0.4 mg/m3 (0.1 ppm)
OSHA PELTWA 0.4 mg/m3 (0.1 ppm)
Physical DescriptionPale-yellow solid with an acrid, chlorine-like odor.
Vapor Pressure(77°F): 0.1 mmHg
Ionization Potential9.68 eV
Upper Exposive Limit?
Lower Explosive Limit?
Incompatibilities & ReactivitiesStrong oxidizers
Exposure Routesinhalation, ingestion, skin and/or eye contact
SymptomsEye irritation, conjunctivitis; keratitis (inflammation of the cornea); skin irritation
Target OrgansEyes, skin
Personal Protection/Sanitation(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Provide:Eyewash, Quick drench
First Aid(See procedures)
Skin:Soap wash immediately
Swallow:Medical attention immediately
Up to 10 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
Up to 20 mg/m3:
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Up to 100 mg/m3:
(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
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division