regular coke

A petroleum coke with good graphitizability, characterized by a combination of properties which differ significantly from those of metallurgicalcoke but do not reach the quality level of premium coke. These properties are: optical anisotropy, medium reversible thermal expansion and low ash content. Regular coke is mainly used for the production of synthetic carbon and graphite materials.
PAC, 1995, 67, 473 (Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)) on page 503