Gas nke Asphalt na-ekpo ọkụ na-emepụta

Asphalt na-ekpo ọkụ na-ebunye gas ndị mejupụtara ya bụ hydrocarbon dị iche iche, karịsịa polycyclic aromatic hydrocarbons.

Ihe mejupụtara asphalt gụnyere asphaltene, resins, juputara na aromatic hydrocarbons.

N'ihi na elu-okpomọkụ ọgwụgwọ ma ọ bụ ogologo evaporation nke eke, mmanụ ala, na coal tar asphalt, usoro ikpo ọkụ na-emepụta obere ihe molekụla, isi ogologo yinye na aromatic hydrocarbons, ụmụ irighiri ihe dị mkpa dị ka naphthalene, anthracene, phenanthrene, na benzo[a]pyrene.

Polycyclic aromatic hydrocarbons na-egbu egbu nke ọma na ụfọdụ bụ ndị a ma ama carcinogens.