Flow diagram of coal to coal-tar-pitch process
![Diagram describing coal tar process](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Coal%20tar%20flow%20diagram%20with%20photo2.png?itok=Y5ojtQ4X)
Detailed Description
Coal tar is a byproduct of the coking, liquefaction, or gasification of coal. Coal-tar pitch is the residue that remains after the distillation of coal tar. Coal tar and coal-tar pitch are used in coal-tar-based sealcoat products, although use of coal-tar pitch is more common than use of coal tar. Both coal tar and coal-tar pitch are known human carcinogens. Learn more about coal-tar-based sealcoat here.
Sources/Usage
Public Domain.
Coal-Tar-Based Pavement Sealcoat—Potential Concerns for Human Health and Aquatic Life
USGS Fact Sheet 2016-3017