FLAME-RETARDANT AGENT COMPOSITION AND FLAME-RETARDANT RESIN COMPOSITION CONTAINING SAME, AND MOLDED ARTICLE

화학식(I) 의 유기 인 화합물을 함유하며, 또, 상기 유기 인 화합물을 GPC로 측정했을 때에, 식(II)의 화합물의 함유량이 1.8면적% 이하인 난연제 조성물:상기 식에서, R및 R는 탄소수1∼5의 알킬기이고, R및 R는 수소원자 또는 탄소수 1∼5의 알킬기이고, Y는 결합손, -CH-, -C(CH)2-, -S-, -SO-, -O-, -CO- 또는 -N=N-기이고, k는 0 또는 1이고, m은 0∼4의 정수이다. A flame-retardant agent composition containing an organophosphorous compound represented by the general formula (I): wherein R 1 and R 2 each independently represent an alkyl group having 1 to 5 carbon atoms; R 3 and R 4 each independently represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms; Y represents a bond or a group -CH 2 -, -C(CH 3 ) 2 -, -S-, -SO 2 -, -O-, -CO- or - N=N-; k represents 0 or 1; and m represents an integer of 0 to 4 and having a property such that a content of a compound represented by the formula (II): wherein R 1 , R 2 and R 3 are as defined in the general formula (I) is 1.8% by area or less when the organophosphorous compound is determined by gel permeation chromatography (GPC).