Natural Bitumen Specification

Ash content                   7-24% (<1% up to 30% available)
Moisture content                0.5%
Volatile mater                 60-65%
Fixed caron                    27-33%
Solubility in CS2             72-78%
Solubility in tce            60-70.6%
Normal heptane in so   60-70.7%
Softening point            225-240℃
Carbon                           75-80%
Hydrogen                        6-9.2%
Nitrogen                       0.8-1.5%
Sulphur                             3-6%
Oxygen                       1.5-2.5%

There are also other qualities for other products also available.