p-Terphenyl

  • p-Diphenylbenzene
  • 1,4-Diphenylbenzene
  • 4-Phenylbiphenyl
  • 1,4-Terphenyl
  • p-Triphenyl
Formula
C18H14
Structure
Description
Colorless or light-yellow solid.
Uses
Polymerized with styrene to make a plastic phosphor, single crystals used as scintillation counters.

Registry Numbers and Inventories.
CAS
92-94-4
EC (EINECS/ELINCS)
202-205-2
R 36/37/38
RTECS
WZ6475000
RTECS class
Agricultural Chemical and Pesticide
UN (DOT)
1325
Beilstein/Gmelin
1908447
Beilstein Reference
4-05-00-02483
Swiss Giftliste 1
G-3809
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C18H14
Formula mass
230.32
Melting point, °C
210 - 211
Boiling point, °C
383
Vapor pressure, mmHg
3E-6 (25 C)
Vapor density (air=1)
7.95
Critical temperature
621
Critical pressure
32.9
Density
1.234 g/cm3 (0 C)
Solubility in water
Insoluble
Viscosity
0.752 (225 C)
Partition coefficient, pKow
5.73
Heat of fusion
35.3 kJ/mol
Heat of vaporization
68.4 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
207
Upper exp. limit, %
3.4
Lower exp. limit, %
0.5
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Flammable/combustible material. May be ignited by friction, heat, sparks or flames.
Hazards
Fire may produce irritating or poisonous gases.
Combustion products
Fire may produce irritating and/or toxic gases.

Health.
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
-
Exposure effects
Headache, fatigue, numbness, and aching limbs have occurred in workers. Peripheral and central nerve damage may occur.
   Ingestion
May cause digestive tract disturbances.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Remove contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1325
Response guide
Hazard class
4.1
Packing Group
II; III
 
32. Aromatic hydrocarbons