NIOSH Pocket Guide to Chemical Hazards

Diphenyl

CAS 92-52-4

C6H5C6H5

RTECS DU8050000
Synonyms & Trade Names
Biphenyl, Phenyl benzene
DOT ID & Guide

Exposure
Limits

NIOSH REL: TWA 1 mg/m3 (0.2 ppm)
OSHA PEL: TWA 1 mg/m3 (0.2 ppm)
IDLH 100 mg/m3 See: 92524 Conversion 1 ppm = 6.31 mg/m3
Physical Description
Colorless to pale-yellow solid with a pleasant, characteristic odor. [fungicide]
MW: 154.2
BP: 489°F
MLT: 156°F
Sol: Insoluble
VP: 0.005 mmHg
IP: 7.95 eV

Sp.Gr: 1.04
Fl.P: 235°F
UEL(311°F): 5.8%
LEL(232°F): 0.6%

Combustible Solid
Incompatibilities & Reactivities
Oxidizers
Measurement Methods
NIOSH 2530; OSHA PV2022
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
Provide: Eyewash (molten), Quick drench (molten)
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations NIOSH/OSHA
Up to 10 mg/m3:
(APF = 10) Any air-purifying half-mask respirator with organic vapor cartridge(s) in combination with an N95, R95, or P95 filter. The following filters may also be used: N99, R99, P99, N100, R100, P100. Click here for information on selection of N, R, or P filters.
(APF = 10) Any supplied-air respirator
Up to 25 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
(APF = 25) Any powered air-purifying respirator with an organic vapor cartridge in combination with a high-efficiency particulate filter.*
Up to 50 mg/m3:
(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 = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s) 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
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 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, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, throat; headache, nausea, lassitude (weakness, exhaustion), numb limbs; liver damage
Target Organs Eyes, respiratory system, liver, central nervous system
See also: INTRODUCTION   See ICSC CARD: 0106   See MEDICAL TESTS: 0086