Product Identification

Product Name

1,3-Diphenylbenzene

Synonyms

1,1':3',1''-Terphenyl
1,3-Diphenylbenzene
1,3-Terphenyl
3-Phenylbiphenyl
Isodiphenylbenzene
m-Diphenylbenzene

CAS

92-06-8

Formula

C18H14

Molecular Weight

230.32

EINECS

202-122-1

RTECS

WZ6470000

RTECS Class

Other

Beilstein/Gmelin

1864778

Beilstein Reference

4-05-00-02480

Physical and Chemical Properties

Appearance

Yellow needles from alc. Faint, pleasant odor /commercial terphenyl mixtures/.

Solubility in water

Insoluble

Melting Point

86-87

Boiling Point

379

Vapor Pressure

0.01 (20 C)

Density

1.20 g/cm3 (20 C)

Heat Of Vaporization

64.2 kj/mol

Usage

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.

First Aid Measures

Ingestion

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.

Inhalation

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.

Skin

Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.

Eyes

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.

Handling and Storage

Storage

Keep tightly closed. Store in a cool and dry place.

Handling

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.

Hazards Identification

Inhalation

Respiratory tract irritation and bronchitis have been reported.

Skin

Percutaneous absorption through intact skin has been noted.

Eyes

Eye and mucous membrane irritation may occur.

Ingestion

Nausea, diffuse pain, and indigestion have been reported in workers with prolonged exposure to biphenyl.

Hazards

Fire may produce irritating or poisonous gases.

EC Risk Phrase

R 36/37/38

EC Safety Phrase

S 26 36

UN (DOT)

1325

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

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.

Exposure Effects

Headache, fatigue, numbness, and aching limbs have occurred in workers. Peripheral and central nerve damage may occur.

Exposure limit(s)

NIOSH REL: C 5 mg/m3 (0.5 ppm) OSHA PEL: C 9 mg/m3 (1 ppm) IDLH 500 mg/m3

Poison Class

4

Fire Fighting Measures

Flash Point

191

Fire Fighting

Carbon dioxide, dry chemical.

Upper exp. limit

3.4

Lower exp. limit

.5

Fire Potential

Slight fire risk when exposed to heat or flame.

Accidental Release Measures

Small spills/leaks

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.

Stability and Reactivity

Incompatibilities

Incompatible with oxidizing agents.

Stability

Stable.

Decomposition

Oxides of carbon.

Combustion Products

Fire may produce irritating and/or toxic gases.

Transport Information

UN Number

1325

Hazard Class

4.1

Packing Group

II; III