Sample of Gilsonite (Natural Bitumen) Specification 1 Ash Content,wt% -12 (ASTM-D3174) 2 Moisture Content,wt%- 2 (ASTM-D3173) 3 Volatile Matter,wt% -62 (ASTM-D3175) 4 Fixed Carbon,wt%- 28 (ASTM-D3172) 5 Solubility in CS2,wt% -80 (ASTM-D4) 6 Specific Gravity @ 25 Cº -1 (ASTM-D3289) 7 Normal Heptane Insolubles,wt%- 85 (ASTM-D3279) 8 Color in mass -Black 9 Color in streak or powder- brown 10 Softening Point, Cº 225 ±- 5 (ASTM-D36) 11 Penetration @ 25 Cº , 10 -1 mm- 0 (ASTM-D5) 12 Solubility in tricholoroethylene -56 (ASTM-D2042) Element Analysis 1 Carbon,wt% -72 (ASTM-D5291) 2 Hydrogen,wt% -6.9 (ASTM-D5291) 3 Nitrogen,wt%- 0.64 (ASTM-D5291) 4 Oxygen,wt%- 2.9 (ASTM-D5291) 5 Sulphur,wt%