NIOSH Pocket Guide to Chemical Hazards

Hydrogenated terphenyls

CAS 61788-32-7


RTECS WZ6535000
Synonyms & Trade Names
Hydrogenated diphenylbenzenes, Hydrogenated phenylbiphenyls, Hydrogenated triphenyls [Note: Complex mixture of terphenyl isomers that are partially hydrogenated.]
DOT ID & Guide


NIOSH REL: TWA 0.5 ppm (5 mg/m3)
OSHA PEL†: none
IDLH N.D. See: IDLH INDEX Conversion 1 ppm = 12.19 mg/m3 (40% hydrogenated)
Physical Description
Clear, oily, pale-yellow liquids with a faint odor. [plasticizer/heat-transfer media]
MW: 298 (40% hydrogenated)
BP: 644°F (40% hydrogenated)
FRZ: ?
Sol: Insoluble
VP: ?
IP: ?

Sp.Gr(77°F): 1.003-1.009 (40% hydrogenated)
Fl.P: 315°F (40% hydrogenated)
UEL: ?
LEL: ?

Class IIIB Combustible Liquids
Incompatibilities & Reactivities
None reported [Note: When heated, irritating vapors will be released.]
Measurement Methods
None available
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

First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations Not available.
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; liver, kidney, hematopoietic damage
Target Organs Eyes, skin, respiratory system, liver, kidneys, hematopoietic system
See also: INTRODUCTION   See ICSC CARD: 1249