Monoclinic prisms from methanol.
Terphenyl mixtures are used industrially as heat storage and transfer agents, as textile dye carriers, and as intermediates in the production of nonspreading lubricants. From 1960-1970, technical grade terphenyls were used as coolants for nuclear reactors, whereas contemporary use has been in solar-heating systems. Terphenyl mixtures.
Registry Numbers and Inventories.
R 22 36/37/38
S 26 36/37/39
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
54 - 56
Boiling point, °C
Vapor pressure, mmHg
Vapor density (air=1)
1.1 g/cm3 (20 C)
Solubility in water
0.357 cp (28 C)
17.3 g/s2 (28 C)
1.6421 (20 C)
Heat of fusion
Heat of vaporization
Hazards and Protection.
Keep tightly closed. Store in a cool and dry place.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles.
Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode. 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 breathing apparatus operated in pressure-demand or other positive-pressure mode.
Make no contact with the spilled material. ELIMINATE all ignition sources and ground all equipment. With clean shovel place material into clean, dry container and cover loosely; move containers from spill area.
Incompatible with oxidizing agents.
Oxides of carbon.
Upper exp. limit, %
Lower exp. limit, %
Carbon dioxide, dry chemical.
Slight fire risk when exposed to heat or flame.
Fire may produce irritating or poisonous gases.
Fire may produce irritating and/or toxic gases.
NIOSH REL: C 5 mg/m3 (0.5 ppm) OSHA PEL: C 9 mg/m3 (1 ppm) IDLH 500 mg/m3
Headache, fatigue, numbness, and aching limbs have occurred in workers. Peripheral and central nerve damage may occur.
Nausea, diffuse pain, and indigestion have been reported in workers with prolonged exposure to biphenyl.
Respiratory tract irritation and bronchitis have been reported.
Percutaneous absorption through intact skin has been noted.
Eye and mucous membrane irritation may occur.
Dilution: following ingestion and/or prior to gastric evacuation, immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 15 ml/kg in a child). Consider after ingestion of a potentially life-threatening amount of poison if it can be performed soon after ingestion (generally within 1 hour). Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.