(a 1) of diphenyl acrylate, (a 2) to hydroxyphenyl-triazine, (a 3) to the benzotriazole derivatives of the formula (2) and (a 4) D selected from alkyl naphthalate of the formula (I) (B) a cosmetic composition comprising a symmetrical triazine derivative of formula (3) and a UV-absorber selected from (c 1 ) cinnamic acid derivatives and (c 2 ) dibenzoylmethane derivatives, Is disclosed. [Chemical Formula 1] Wherein R 1 , R 2 and R 3 are independently of each other C 1 -C 18 alkyl, (2) [Wherein, R 4 is a carbon number of 8 to 30 respectively, the formula (2a) (Wherein E 1 is straight chain C 1 -C 14 alkyl, E 2 is straight chain C 4 -C 15 alkyl, and the carbon number of E 1 and E 2 is 7 to 29), wherein at least three isomeric branched A random statistical mixture of car alkyl groups, R 5 is a C 1 -C 5 alkyl； (3) [Wherein, A is a group of formula (3a) Or (3b) Wherein R 6 and R 10 are independently of each other hydrogen, C 1 -C 18 alkyl or C 6 -C 12 aryl and R 7 , R 8 and R 9 independently of one another are hydrogen or a group of the formula (3c ) (3a), at least one of the radicals R 7 , R 8 and R 9 is a radical of the formula (3c) and R 11 , R 12 , R 13 and R 14 are independently of each other hydrogen C 1 -C 18 alkyl, C 1 -C 18 alkoxy, C 6 -C 12 aryl, biphenyl, C 6 -C 12 aryloxy, C 1 -C 18 alkylthio, carboxy, - C 1 -C 18 alkylcarboxyl, aminocarbonyl, mono- or di-C 1 -C 18 alkylamino, C 1 -C 10 acylamino or -COOH, M is an alkali metal ion and x Is a radical of 1 or 2 and y is a number of 2 to 10,(a1) 디페닐아크릴레이트, (a2) 하기 화학식 (1)의 히드록시페닐 트리아진, (a3) 하기 화학식 (2)의 벤조트리아졸 유도체 및 (a4) 디알킬 나프탈레이트로부터 선택되는 UV 흡수제의, (b) 하기 화학식 (3)의 대칭적 트리아진 유도체, 및 (c1) 신남산 유도체 및 (c2) 디벤조일메탄 유도체로부터 선택되는 UV-흡수제를 포함하는 미용 조성물을 안정화시키기 위한 용도가 기재되어 있다.[화학식 1][식 중, R1, R2 및 R3은 서로에 독립적으로 C1-C18알킬이다][화학식 2][식 중, R4는 각각 탄소수가 8 내지 30이고 화학식 (2a) (여기서 E1은 직쇄 C1-C14알킬이고, E2는 직쇄 C4-C15알킬이고, E1과 E2의 탄소수 합은 7 내지 29이다)을 가지는 3종 이상의 이성질체성 분지형 2차 알킬기의 랜덤 통계적 혼합물이고,R5는 C1-C5알킬이다][화학식 3][식 중,
