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Phenyl ether-biphenyl mixture (vapor)

Synonyms & Trade Names
Diphenyl oxide-diphenyl mixture, Dowtherm® A
CAS No.
8004-13-5
RTECS No.
DV1500000
DOT ID & Guide
Formula
C₆H₅OC₆H₅/​C₆H₅C₆H₅
Conversion
1 ppm = 6.79 mg/m3 (approx)
IDLH
10 ppm
See: 8004135
Exposure Limits
NIOSH REL
TWA 1 ppm (7 mg/m3)
OSHA PEL
TWA 1 ppm (7 mg/m3)
Measurement Methods
NIOSH 2013
See: NMAM or OSHA Methods
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.]
Molecular Weight
166 (approx)
Boiling Point
495°F
Freezing Point
54°F
Solubility
Insoluble
Vapor Pressure
(77°F): 0.08 mmHg
Ionization Potential
?
Specific Gravity
(77°F): 1.06
Flash Point
239°F
Upper Exposive Limit
?
Lower Explosive Limit
?
Class IIIB Combustible Liquid: Fl.P. at or above 200°F.
Incompatibilities & Reactivities
Strong oxidizers
Exposure Routes
inhalation, skin and/or eye contact
Symptoms
irritation eyes, nose, skin; nausea
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
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

See also
INTRODUCTION

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