Product Name

  • Name

    m-Terphenyl

  • EINECS
  • CAS No. 199-26-8
  • Density
  • Solubility
  • Melting Point
  • Formula C21H12N4
  • Boiling Point
  • Molecular Weight 320.353
  • Flash Point
  • Transport Information
  • Appearance
  • Safety
  • Risk Codes
  • Molecular Structure Molecular Structure of 199-26-8 (m-Terphenyl)
  • Hazard Symbols
  • Synonyms Benzo[a]pyrido[1',2':1,2]imidazo[4,5-c]phenazin;
  • PSA 43.08000
  • LogP 4.73710

M-Terphenyl Chemical Properties

Chemistry informtion about M-Terphenyl (CAS NO.199-26-8) is:
IUPAC Name: 1,3-Diphenylbenzene
Synonyms: M-Terphenyl
MF: C18H14
MW: 230.3
EINECS: 207-332-7 
Density: 1.046 g/cm3
Flash Point: 175.7 °C
Boiling Point: 365 °C at 760 mmHg
Vapour Pressure: 3.4E-05 mmHg at 25°C 
Enthalpy of Vaporization: 58.72 kJ/mol
Following is the molecular structure of M-Terphenyl (CAS NO.199-26-8) is:

M-Terphenyl Uses

  M-Terphenyl (CAS NO.199-26-8) is used in the production of polychlorinated terphenyls, which were formerly used as heat storage and transfer agents.

M-Terphenyl Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 oral 2400mg/kg (2400mg/kg) gastrointestinal: "hypermotility, diarrhea" skin and appendages (skin): hair: other American Industrial Hygiene Association Journal. Vol. 23, Pg. 372, 1962.

M-Terphenyl Consensus Reports

Reported in EPA TSCA Inventory.

M-Terphenyl Safety Profile

Moderately toxic by ingestion. Combustible when exposed to heat or flame. To fight fire, use water, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes.

M-Terphenyl Standards and Recommendations

OSHA PEL: CL 0.5 ppm
ACGIH TLV: TWA CL 0.5 ppm

M-Terphenyl Specification

 M-Terphenyl (CAS NO.199-26-8) is a yellow solid.It is insoluble in water.
First Aid Measures:
Eye: If this chemical contacts the eyes, immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately. Contact lenses should not be worn when working with this chemical.
Skin: If this chemical contacts the skin, immediately flush the contaminated skin with water. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water. Get medical attention promptly.
Breathing: If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform mouth-to-mouth resuscitation. Keep the affected person warm and at rest. Get medical attention as soon as possible.
Swallow: If this chemical has been swallowed, get medical attention immediately.
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