NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Phenyl ether-biphenyl mixture (vapor)

CAS
8004-13-5

C6H5OC6H5/C6H5C6H5

RTECS
DV1500000
Synonyms & Trade Names

Diphenyl oxide-diphenyl mixture; Dowtherm® A
DOT ID & Guide

Exposure
Limits

NIOSH REL: TWA 1 ppm (7 mg/m3)
OSHA PEL: TWA 1 ppm (7 mg/m3)
IDLH
10 ppm See: 8004135
Conversion
1 ppm = 6.79 mg/m3 (approx)
Physical Description
Colorless to straw-colored liquid or solid (below 54°F) with a disagreeable, aromatic odor. [Note: A mixture typically contains 75% phenyl ether & 25% biphenyl.]
MW: 166 (approx)
BP: 495°F
FRZ: 54°F
Sol: Insoluble
VP(77°F): 0.08 mmHg
IP: ?

Sp.Gr(77°F): 1.06
Fl.P: 239°F
UEL: ?
LEL: ?

Class IIIB Combustible Liquid: Fl.P. at or above 200F.
Incompatibilities & Reactivities

Strong oxidizers
Measurement Methods
NIOSH 2013
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: No recommendation

First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Respiratory support

Respirator Recommendations
NIOSH/OSHA
Up to 10 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
(APF = 50) Any air-purifying full-facepiece respirator equipped with organic vapor cartridge(s) in combination with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.
(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.
(APF = 25) Any powered air-purifying respirator with an organic vapor cartridge in combination with 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
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 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
Important additional information about respirator selection
Exposure Routes
inhalation, skin and/or eye contact
Symptoms
Irritation eyes, nose, skin; nausea
Target Organs
Eyes, skin, respiratory system
See also: INTRODUCTION