Bitumen chemistry is briefly explained in this article.
Hydrocarbon mixed bitumen with dark brown-black color, in solid, semi-solid or viscose form, with adhesive properties of natural or refinery origin, mainly containing high molecular weight hydrocarbons.
This material is completely soluble in carbon disulfide (CS2), trichloroethylene (C2HCl3) and xylene (C6H4(CH3)2). Its vapor pressure is negligible at ambient temperature and in this case it is almost odorless. The most abundant and widely used type of bitumen is petroleum bitumen, which is physically a homogeneous substance and chemically a heterogeneous mixture of different chemical compounds.
This hydrocarbon mixture generally contains 90% of carbon and hydrogen atoms and the rest, nitrogen, sulfur and oxygen and small amounts of nickel, iron, magnesium and… In terms of behavior, bitumen is a substance that does not behave like an elastic substance or a viscous substance at ambient temperature, but the behavior of bitumen includes a combination of these two states, i.e. viscoelastic.