Coal Tar is the by-product of making coke or coal gas. It’s a complex , highly viscous mixture of some 200 compounds including phenols, polycyclic aromatic hydrocarbons (PAHs), and heterocyclic compounds.
Coal tar is generally used in:
- Inflammable material to fire boilers in industries
- Medicated products such as shampoo, ointments etc. and also as a treatment for dandruff and psoriasis, as well as being used to kill and repel head lice.
- In Chemical industry as precursor to some chemicals such as hair dyes.
- In beautifying the pavements.
Coal Tar is not used in road construction like asphalt. Asphalt is sticky, black and highly viscous liquid or semi-solid present in crude petroleum’s and in some natural deposits.