What are phisycal properties of tar, which comes from the bottom of fractional distillation tower of crude oil

the tar is also called ';vacuum bottom';. It is a very viscous liquid.What are phisycal properties of tar, which comes from the bottom of fractional distillation tower of crude oil
-Viscous


-not Flammable


used as a Disinfectant (coal tar in anti-dandruff shampoo)What are phisycal properties of tar, which comes from the bottom of fractional distillation tower of crude oil
Coal tar is a brown or black liquid of high viscosity, which smells of naphthalene and aromatic hydrocarbons. It is the liquid by-product of the distillation of coal to make coke. The gaseous by-product of this process is commonly known as town gas.





Bitumen is a mixture of organic liquids that are highly viscous, black, sticky, entirely soluble in carbon disulfide, and composed primarily of highly condensed polycyclic aromatic hydrocarbons.





Bitumen is the residual (bottom) fraction obtained by fractional distillation of crude oil. It is the heaviest fraction and the one with the highest boiling point.





In British English, the word 'asphalt' refers to a mixture of mineral aggregate and bitumen (or tarmac in common parlance). The word 'tar' refers to the black viscous material obtained from the destructive distillation of coal and is chemically distinct from bitumen. In American English, bitumen is referred to as 'asphalt' or 'asphalt cement' in engineering jargon. In Australian English, bitumen is sometimes used as the generic term for road surfaces.