<unk>  is a product of the distillation of coal.
Asphalt (now more commonly used than<unk>  and<unk>  are both forms of bitumen
Currently used mainly for roofing and road paving
When used for these purposes,<unk> /asphalt is heated to between 140-190°C (for paving) and 210-270°C (for roofing)
Injuries limited almost exclusively to occupational exposure in these fields<unk> /asphalt is highly viscous and sticks to skin, making it difficult to remove and leading to more severe burns<unk>  itself is sterile, but dead tissue underneath is not
Asphalt (now more commonly used than<unk>  and<unk>  are both forms of bitumen
When used for these purposes,<unk> /asphalt is heated to between 140-190°C (for paving) and 210-270°C (for roofing)
Injuries limited almost exclusively to occupational exposure in these fields
Tar burn
Caustic ingestion
Nailbed laceration
Caustic eye exposure 
Cement burn
Caustic dermal burn
Frostbite
Airbag-related burns