NIOSH Pocket Guide to Chemical Hazards

Chlorinated diphenyl oxide



Synonyms & Trade Names
Synonyms depend on the degree of chlorination of diphenyl oxide [(C6H5)2O], ranging from monochlorodiphenyl oxide [(C6H4Cl)O(C6H5)] to decachlorodiphenyl oxide [(C6Cl5)O(C6Cl5)].
DOT ID & Guide


NIOSH REL: TWA 0.5 mg/m3
OSHA PEL: TWA 0.5 mg/m3
IDLH 5 mg/m3 See: IDLH INDEX Conversion
Physical Description
Appearance and odor vary depending upon the specific compound.
Properties vary depending upon the specific compound.

Incompatibilities & Reactivities
Strong oxidizers
Measurement Methods
NIOSH 5025
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily

First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations NIOSH/OSHA
Up to 5 mg/m3:
(APF = 10) Any supplied-air respirator
(APF = 50) Any self-contained breathing apparatus 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
(APF = 50) Any air-purifying, full facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor and acid gas 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
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Acne-form dermatitis, liver damage
Target Organs Skin, liver