# NIOSH Pocket Guide to Chemical Hazards
Quinone | CAS 106-51-4
OC6H4O | RTECS DK2625000
Synonyms & Trade Names 1,4-Benzoquinone; p-Benzoquinone; 1,4-Cyclohexadiene dioxide; p-Quinone | DOT ID & Guide 2587 153
Exposure Limits | NIOSH REL: TWA 0.4 mg/m3 (0.1 ppm)
OSHA PEL: TWA 0.4 mg/m3 (0.1 ppm)
IDLH 100 mg/m3 | Conversion 1 ppm = 4.42 mg/m3
Physical Description Pale-yellow solid with an acrid, chlorine-like odor.
MW: 108.1 | BP: Sublimes | MLT: 240°F | Sol: Slight
VP(77°F): 0.1 mmHg | IP: 9.68 eV |  | Sp.Gr: 1.32
Fl.P: 100-200°F | UEL: ? | LEL: ? |
Combustible Solid
Incompatibilities & Reactivities Strong oxidizers
Measurement Methods NIOSH S181 (II-4)
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA 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 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, ingestion, skin and/or eye contact
Symptoms Eye irritation, conjunctivitis; keratitis (inflammation of the cornea); skin irritation
Target Organs Eyes, skin
See also: INTRODUCTION