BRIFLY DEFINE COAL TAR?
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COAL TAR
Coal tar is a brown or black liquid of extremely high viscosity. Coal tar is among the by-products when coal is carbonized to make coke or gasified to make coal gas. Coal tars are complex and variable mixtures of phenols, polycyclic aromatic hydrocarbons (PAHs), and heterocyclic compounds.
It is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system.
USES
Pavement sealcoat
Sealcoat
Coal tar is incorporated into some parking-lot sealcoat products, which are used to protect and beautify the underlying pavement.
Sealcoat products that are coal-tar based typically contain 20 to 35 percent coal-tar pitch.
Industrial
Being flammable, coal tar is sometimes used for heating or to fire boilers.
Like most heavy oils, it must be heated before it will flow easily.
Coal tar was a component of the first sealed roads.
Coal tar is also used to manufacture paints, synthetic dyes, and photographic materials.
Medical
It can be used in medicated shampoo, soap and ointment, as a treatment for dandruff and psoriasis, as well as being used to kill and repel head lice.
Pine tar has historically also been used for this purpose.
Coal tar is a brown or black liquid of extremely high viscosity. Coal tar is among the by-products when coal is carbonized to make coke or gasified to make coal gas. Coal tars are complex and variable mixtures of phenols, polycyclic aromatic hydrocarbons (PAHs), and heterocyclic compounds.
It is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system.
USES
Pavement sealcoat
Sealcoat
Coal tar is incorporated into some parking-lot sealcoat products, which are used to protect and beautify the underlying pavement.
Sealcoat products that are coal-tar based typically contain 20 to 35 percent coal-tar pitch.
Industrial
Being flammable, coal tar is sometimes used for heating or to fire boilers.
Like most heavy oils, it must be heated before it will flow easily.
Coal tar was a component of the first sealed roads.
Coal tar is also used to manufacture paints, synthetic dyes, and photographic materials.
Medical
It can be used in medicated shampoo, soap and ointment, as a treatment for dandruff and psoriasis, as well as being used to kill and repel head lice.
Pine tar has historically also been used for this purpose.
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