Carbon disulfide is extremely flammable. The vapor will often ignite spontaneously on contact with a hot surface such as a hot plate, oven, or radiator.
When using this solvent, be sure that the filtration is conducted under a hood and well away from flame or other sources of heat. Before placing crucibles or other containers in the oven, all traces of carbon disulfide should be removed (as indicated by the disappearance of all odor). Otherwise, the vapors will ignite. Carbon disulfide is also very irritating to the skin and direct contact should be avoided.
By determining the bitumen solubility test, the percentage of pure bitumen can be obtained using carbon sulfur.
This test is done with ASTM D4 standard.
Filtering Crucible, porcelain, high-form, 25- to 40-mL Capacity, with fine-porosity bottom, 7-µm maximum porosity
Beakers—One 30-mL beaker, Griffin low-form, and one150-mL beaker, Griffin low-form.
In the standard test for bitumen content (ASTM D4), a small sample of about 2 g of the asphalt is dissolved in 100 ml of carbon disulfide and the solution is filtered through a filtering mat in a filtering crucible. The material retained on the filter is then dried and weighed, and used to calculate the bitumen content as a percentage of the weight of the original asphalt.
Calculate the bitumen content, as follows:
% Bitumen (% Soluble in Carbon Di-sulfide) =100-(A/B × 100)
A = total mass of insoluble material present, g
B = total mass of water free sample used, g