>> Biphenyl Phenyl benzene
Biphenyl Phenyl benzene
CAS number : 92-52-4
Molecular formula : C12H10
Molar Weight : 154.21 g mol−1
Density : 0.992 g/cm3
Melting point : 68.93 °C
Boiling point : 256 °C
Solubility in water : Insoluble
Dangerous for the environment : (N)
Flash point : 113 °C
Auto ignition temperature : 540 °C
Biphenylis an organic compound that forms
colorless crystals. It has a distinctively pleasant smell.
Biphenyl is an aromatic hydrocarbon with a molecular formula
(C6H5)2. It is notable as a starting material for the production of
polychlorinated biphenyls (PCBs), which were once widely used as
dielectric fluids and heat transfer agents. Biphenyl is also an
intermediate for the production of a host of other organic compounds
such as emulsifiers, optical brighteners, crop protection products,
Biphenyl occurs naturally in coal tar, crude oil, and natural gas
and can be produced from these sources by distillation. Biphenyl is
insoluble in water, but soluble in typical organic solvents. The
biphenyl molecule consists of two connected phenyl rings. Lacking
functionalization, it is not very reactive.
Biphenyl prevents the growth of molds and fungus, and is therefore
used as a preservative particularly in the preservation of citrus
fruits during transportation.
It is mildly toxic, but can be degraded biologically by conversion
into nontoxic compounds. Some bacteria are able to hydroxylate
biphenyl and its polychlorinated biphenyls
Substituted biphenyls can be prepared synthetically by various
coupling reactions including the Suzuki reaction and the Ullmann
reaction and have many uses. Polychlorinated biphenyls were once
used as cooling and insulating fluids and polybrominated biphenyls
are flame retardants. The biphenyl motif also appears in drugs such
as Valsartan and Telmisartan.
Inhalation of dust or vapors can irritate the mucous membranes and
respiratory tract. Other symptoms may parallel those from ingestion
Exerts toxic effects on the central nervous system and liver.
Symptoms may include headache, diffuse gastro-intestinal pain,
nausea, numbness, body aches, and general fatigue.
May cause irritation. May be absorbed through the skin with symptoms
paralleling those from ingestion exposure. May cause allergic
reaction in sensitive individuals.
Vapors and dust cause eye irritation.
Chronic exposure may cause peripheral nerve damage and liver injury.
Aggravation of Pre-existing Conditions:
No information found.
First Aid Measures
Remove to fresh air. If not breathing, give artificial respiration.
If breathing is difficult, give oxygen. Get medical attention.
Induce vomiting immediately as directed by medical personnel. Never
give anything by mouth to an unconscious person. Get medical
Immediately flush skin with plenty of soap and water for at least 15
minutes while removing contaminated clothing and shoes. Get medical
attention. Wash clothing before reuse. Thoroughly clean shoes before
Immediately flush eyes with plenty of water for at least 15 minutes,
lifting lower and upper eyelids occasionally. Get medical attention
Handling and Storage
Keep in a tightly closed container, stored in a cool, dry,
ventilated area. Protect against physical damage. Isolate from
incompatible substances. Containers of this material may be
hazardous when empty since they retain product residues (dust,
solids); observe all warnings and precautions listed for the
These API/ chemicals are designated as those that are used in
the manufacture of the controlled substances and are important to
the manufacture of the substances. For any (Control Substance)
products Import and Export *** subjected to your country government
laws /control substance ACT.
Note /Government Notification: N/A