Patent ID: 8609806

Claim:
A composition comprising a phosphorus-containing phenol compound represented by Formula (3), said composition is obtained by reacting a compound represented by Formula (2) with a composition comprising a compound represented by Formula (1), wherein on a chromatogram of the composition comprising the compound represented by Formula (1) measured by gel permeation chromatography peak area (A), peak area (B) on the high-molecular-weight side of the component of (A), and total area (C) of peak area (A) and peak area (B) satisfy the condition that the value obtained by dividing peak area (B) by total area (C) is 8 area % or less; wherein the gel permeation chromatography is carried out under the conditions: an analytical column having an exclusion limit molecular weight of 400,000, a number of theoretical stages of 16,000, and a length of 30 cm, an analytical column having an exclusion limit molecular weight of 60,000, a number of theoretical stages of 16,000, and a length of 30 cm, and an analytical column having an exclusion limit molecular weight of 10,000, a number of theoretical stages of 16,000, and a length of 30 cm connected in series are used, the temperature in a column room is adjusted to 40° C., an ultraviolet-visible detector is used as a detector, the measured wavelength is 400 nm, the flow rate of tetrahydrofuran as an eluent is 1 ml/min, and a sample is prepared using a tetrahydrofuran solution containing 1% of the compound represented by Formula (1) for the determination