Polythiol composition, optical composition, and optical product

An optical composition comprising:

• an isocyanate-based compound;
• and
• a polythiol composition, wherein the polythiol composition comprises:
• a first polythiol compound which provides a maximum peak in a high performance liquid chromatography (HPLC) analysis graph obtained at a wavelength of 230 nm;
• and
• a second polythiol compound having a molecular weight greater than that of the first polythiol compound and represented by C9H20S6,
• wherein a ratio of a peak area of the second polythiol compound to a peak area of the first polythiol compound of the polythiol composition, which are measured through the HPLC analysis graph obtained at the wavelength of 230 nm, is 0.05 to 5.0%.

An optical product comprising:

• A copolymer of a polythiol composition and an isocyanate-based compound,
• wherein the polythiol composition comprises:
• a first polythiol compound which provides a maximum peak in a high performance liquid chromatography (HPLC) analysis graph obtained at a wavelength of 230 nm;
• and
• a second polythiol compound having a molecular weight greater than that of the first polythiol compound and represented by C9H20S6,
• wherein a ratio of a peak area of the second polythiol compound to a peak area of the first polythiol compound of the polythiol composition, which are measured through the HPLC analysis graph obtained at the wavelength of 230 nm, is 0.05 to 5.0%.