8. Some of ...a.... most important things made from coal-tar are dyes.
Answers
Answer:
Coal tar
Language
Download PDF
Watch
Edit
Coal tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal.[2][3] It has both medical and industrial uses.[2][4] It may be applied to the affected area to treat psoriasis and seborrheic dermatitis (dandruff).[5] It may be used in combination with ultraviolet light therapy.[5] Industrially it is a railway tie preservative and used in the surfacing of roads.[6]
Explanation:
Side effects include skin irritation, sun sensitivity, allergic reactions, and skin discoloration.[5] It is unclear if use during pregnancy is safe for the baby and use during breastfeeding is not typically recommended.[7] The exact mechanism of action is unknown.[8] It is a complex mixture of phenols, polycyclic aromatic hydrocarbons (PAHs), and heterocyclic compounds.[2] It demonstrates antifungal, anti-inflammatory, anti-itch, and antiparasitic properties.[8]
Coal tar was discovered around 1665 and used for medical purposes as early as the 1800s.[6][9] It is on the World Health Organization's List of Essential Medicines.[10] Coal tar is available as a generic medication and over the counter.[4]