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Electronical chemicals

4-Chlorobiphenyl

CAS number

2051-62-9

Molecular formula C12H9Cl
Product name 4-Chlorobiphenyl
Molecular Structure

Appearance:clear to yellowish crystalline powder

Density:1.131g/cm3

Boiling Point:291ºC

Melting Point:77.7ºC

Flash Point:127ºC

Refractive Index:1.583

Storage Condition:Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.

Vapor Pressure:0.00391mmHg at 25°C


4-Chlorobiphenyl is a white crystalline solid with a molecular weight of 218.09 g/mol and a melting point of 82-83 °C. It is a halogenated biphenyl compound and its structure consists of two phenyl rings connected by a single carbon bond. 4-Chlorobiphenyl is a low-volatility, persistent organic pollutant (POP) and is classified as a priority pollutant in the United States. It is widely used as an intermediate in the manufacture of pesticides, dyes, plastics, and pharmaceuticals.


4-Chlorobiphenyl is a highly toxic compound and exposure to it can cause irritation of the eyes, nose, and skin. It is also a suspected human carcinogen and may be associated with an increased risk of certain types of cancer. Chronic exposure to low levels of 4-chlorobiphenyl has also been linked to changes in behavior, learning and memory impairments, and reproductive effects.


4-Chlorobiphenyl is not readily biodegradable and can accumulate in the environment. It is found in air, water, and soil and is known to bioaccumulate in aquatic organisms, leading to potential food chain contamination. 4-Chlorobiphenyl can also volatilize from water sources, leading to potential air pollution. As a result, it is important to reduce or eliminate sources of 4-chlorobiphenyl pollution.


To reduce 4-chlorobiphenyl emissions, industrial and manufacturing processes should be carefully monitored and controlled. Facilities emitting 4-chlorobiphenyl should install and maintain efficient pollution control equipment and utilize best management practices. Wastes containing 4-chlorobiphenyl should be treated before disposal or incineration. In addition, it is important to minimize or eliminate the use of 4-chlorobiphenyl in products and processes.


There are several analytical methods available for measuring 4-chlorobiphenyl. These include gas chromatography, liquid chromatography, and mass spectrometry. These methods can be used to determine the concentration of 4-chlorobiphenyl in air, water, and soil samples.


4-Chlorobiphenyl is a hazardous compound that should be handled with care. Proper safety precautions, such as proper ventilation, protective clothing, and respirators, should be taken when handling this compound. In addition, 4-chlorobiphenyl should be stored in a cool, dry, and well-ventilated area away from sources of ignition and heat.


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