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o-Terphenyl

Synonyms & Trade Names
1,2-Diphenylbenzene, o-Diphenylbenzene, 2-Phenylbiphenyl, 1,2-Terphenyl, ortho-Terphenyl, o-Triphenyl
CAS No.
84-15-1
RTECS No.
WZ6472000
DOT ID & Guide
Formula
C₆H₅C₆H₄C₆H₅
Conversion
1 ppm = 9.42 mg/m3
IDLH
500 mg/m3
See: IDLH INDEX
Exposure Limits
NIOSH REL
C 5 mg/m3 (0.5 ppm)
OSHA PEL
C 9 mg/m3 (1 ppm) See Appendix G
Measurement Methods
NIOSH 5021
See: NMAM or OSHA Methods
Physical Description
Colorless or light-yellow solid.
Molecular Weight
230.3
Boiling Point
630°F
Melting Point
136°F
Solubility
Insoluble
Vapor Pressure
(200°F): 0.09 mmHg
Ionization Potential
7.99 eV
Specific Gravity
1.1
Flash Point
(oc) 325°F
Upper Exposive Limit
?
Lower Explosive Limit
?
Combustible Solid
Incompatibilities & Reactivities
None reported
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, mucous membrane; thermal skin burns; headache; sore throat; In Animals: liver, kidney damage
Target Organs
Eyes, skin, respiratory system, liver, kidneys
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, Quick drench
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Water flush immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH

Up to 25 mg/m3:
(APF = 5) Any quarter-mask respirator.
Click here for information on selection of N, R, or P filters.£

Up to 50 mg/m3:
(APF = 10) Any particulate respirator equipped with an N95, R95, or P95 filter (including N95, R95, and P95 filtering facepieces) except quarter-mask respirators. 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 125 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 25) Any powered, air-purifying respirator with a high-efficiency particulate filter.£

Up to 250 mg/m3:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Up to 500 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 with 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   ICSC CARD: 1525

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