# NIOSH Pocket Guide to Chemical Hazards
Hydrogenated terphenyls | CAS 61788-32-7
(C6Hn)3 | RTECS WZ6535000
Synonyms & Trade Names Hydrogenated diphenylbenzenes, Hydrogenated phenylbiphenyls, Hydrogenated triphenyls [Note: Complex mixture of terphenyl isomers that are partially hydrogenated.] | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 0.5 ppm (5 mg/m3)
OSHA PEL†: none
IDLH N.D. | 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
Personal Protection & Sanitation 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
Respirator Recommendations To be added later
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