Diphenyl

Synonyms & Trade Names

Biphenyl, Phenyl benzene

CAS No.

92-52-4

RTECS No.

DU8050000

DOT ID & Guide

Formula

C₆H₅C₆H₅

Conversion

1 ppm = 6.31 mg/m³

IDLH

100 mg/m³
See: 92524

Exposure Limits

NIOSH REL

TWA 1 mg/m³ (0.2 ppm)

OSHA PEL

TWA 1 mg/m³ (0.2 ppm)

Measurement Methods

NIOSH 2530;
OSHA PV2022
See: NMAM or OSHA Methods

Physical Description

Colorless to pale-yellow solid with a pleasant, characteristic odor. [fungicide]

Molecular Weight

154.2

Boiling Point

489°F

Melting Point

156°F

Solubility

Insoluble

Vapor Pressure

0.005 mmHg

Ionization Potential

7.95 eV

Specific Gravity

1.04

Flash Point

235°F

Upper Explosive Limit

(311°F): 5.8%

Lower Explosive Limit

(232°F): 0.6%

Combustible Solid

Incompatibilities & Reactivities

Oxidizers

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

Personal Protection/Sanitation

(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:Daily
Provide:Eyewash (molt), Quick drench (molt)

First Aid

(See procedures)
Eye:Irrigate immediately
Skin:Water flush immediately
Breathing:Respiratory support
Swallow:Medical attention immediately

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

Important additional information about respirator selection

Diphenyl

NIOSH REL

OSHA PEL

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