1, 6-naphthalene dithiol and method for producing same

Provided are a naphthalene dithiol having high purity and reduced degree of coloration, and a method for producing the naphthalene dithiol. The 1, 6-naphthalene dithiol according to the present invention has an area fraction purity of 99.5% or more as determined by high performance liquid chromatography, and a polymer content of 0.2% or less. And the Gardner color in the molten state is 1 or less. The polymer of 1, 6-naphthalene dithiol may be a disulfide of the dimer. Thus, 1, 6-naphthalenedithiol can be produced by distilling a crude raw material containing at least 1, 6-naphthalenedithiol and a polymer of 1, 6-naphthalenedithiol to distill a distillate containing 1, 6-naphthalenedithiol. The crude raw material may be a solid dried product of a crude refined product of 1, 6-naphthalenedithiol refined from the reaction mixture. 提供高纯度且降低着色度的萘二硫醇及其制造方法。本发明的1,6-萘二硫醇以高效液相层析法测定的面积百分率的纯度为99.5％以上，且1,6-萘二硫醇的多聚物的含量为0.2％以下；熔融状态的加德纳色度为1以下。前述1,6-萘二硫醇的多聚物可为二聚物的二硫化物。如此1,6-萘二硫醇可通过将至少含有1,6-萘二硫醇及1,6-萘二硫醇的多聚物的粗原料蒸馏而馏出含有1,6-萘二