Biphenyl
CAS Number
92-52-4
EC Number
202-163-5
E Number
E225
FEMA Number
FEMA 3129
What is Biphenyl?
Biphenyl (CAS 92-52-4), also known as diphenyl and approved as E230 in food applications, is an aromatic hydrocarbon used industrially as a heat transfer medium and chemical intermediate.
Where is Biphenyl used?
- Food packaging and citrus fruit treatment: E230 application suppresses mold growth during storage and transport
- Chemical synthesis: key intermediate in the production of liquid crystal polymers and pharmaceuticals
- High-temperature processing: blended with diphenyl oxide to create thermal fluids for chemical reactors and industrial heating circuits
- Fragrance formulation: contributes a subtle floral-geranium note and is registered under FEMA 3129 for flavor use.
Commercial specifications
- Purity levels typically range from 99% upward
- Standard commercial grades include technical grade for industrial and heat transfer applications, and food/FCC-grade material for use under E230 regulatory frameworks
Other Names (Synonyms)
E230|diphenyl|1,1′-biphenyl|Bibenzene|Lemonene|Xenene|1,1'-Diphenyl|Phenador-X
What are the physical properties of Biphenyl?
Melting Point 69-71 °C
Boiling Point 254-255 °C
Density 1.041 g/cm³ @ Temp: 20 °C
Flash Point 113 °C
Appearance Biphenyl is a combustible, white flakes or crystalline solid. Pleasant, characteristic odor.
Color White to faint yellow
Odor pleasant odor
Form Crystalline Powder, Crystals or Flakes
Water Solubility insoluble
Vapor Pressure 9.46 mm Hg ( 115 °C)
Refractive Index 1.475
Log P 4.008 at 25℃
How is Biphenyl classified and handled safely? Learn More
Warning
GHS07· Irritant GHS09· Environmental Hazard GHS06· Toxic GHS08· Health Hazard
Hazard Statements
H303 May be harmful if swallowed
H313 May be harmful in contact with skin
H315 Causes skin irritation
H316 Causes mild skin irritation
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
Which trade and regulatory codes apply to Biphenyl?
HS Code 29029030
UN Number 3077
ADR Class 9
Packing Group III
Storage Class 13 - Non Combustible Solids
WGK (Germany) 2