[The residue from the distillation of alkali-washed naphthalene oil having an approximate distillation range of 220 oC to 300 oC (428 oF to 572 oF).
[The residue from the distillation of alkali-washed naphthalene oil having an approximate distillation range of 220 oC to 300 oC (428oF to 572oF).