provided are compounds and compositions thereof that are useful as antioxidants in personal care formulations . the compounds are of the formula i : wherein r 1 , r 2 , r 3 , r 4 , and r 5 are independently h , — oh , c 1 - c 6 alkoxy , — cooh , — coo − m + or — o − m + , where m + is a sodium , potassium , or ammonium ion , and r 6 , r 7 , r 8 , r 9 , and r 10 , are independently h , — oh , c 1 - c 6 alkoxy , — cooh , — coo − m + or — o − m + , where m + is a sodium , potassium , or ammonium ion , or a substituent of formula ii : wherein r 11 , r 12 , r 13 , r 14 , and r 15 are independently h , — oh , c 1 - c 6 alkoxy , — cooh , — coo − m + or — o − m + , where m + is a sodium , potassium , or ammonium ion , provided that one of r 6 , r 7 , r 8 , r 9 , and r 10 is a substituent of formula ii .