Chazin earned his bachelor's degree from CCNY, and went on for his master's at Columbia University. In 1939 he earned the degree and title of rabbi, with merit, from the Jewish Theological Seminary, receiving in course the degree of Doctor of Hebrew Letters and an honorary Doctor of Divinity.
His first congregation was Beth Judah of West Philadelphia.
Chazin was among the first rabbis in Philadelphia to combine preaching and teaching, which he developed and called "a dialogue on the Sidra of the week."
In addition to his work with the synagogue – which closed in the spring of 2004 – he was chaplain of the Philadelphia Police Department for 25 years, and chaplain of Shomrim, the police and firemen of Jewish faith, for 47 years. He also was a chaplain, with the rank of major, in the United States Army/Air Force during World War II.
Chazin served as president of both the Philadelphia Region of the Rabbinical Assembly and the Philadelphia Board of Rabbis. He was twice chairman of the Rabbinical Assembly's National Convention. In addition, he was one of the founders and life board member of the Solomon Schechter Day School of Philadelphia.
He was a well-known book reviewer and the author of 12 cantatas – two of which, Henrietta Szold and What Makes a Jewish Home – were published.
Temple Sholom honored Chazin and his wife, Beatrice, on their double-chai (36th) anniversary year by dedicating the auditorium in their name.
Chazin retired from Temple Sholom in 1991 as rabbi emeritus.
In addition to his wife, the former Beatrice Pugatsky, the rabbi is survived by daughters Rhena Kelsen and Meryl "Michal" Lissek; son Daniel Chazin; brother Meyer Chazin; five grandchildren; and four great-grandchildren.
Contributions in his memory can be made to: the Temple Sholom Fund at Beth Sholom Congregation, c/o Rabbi Andrea Merow, 8231 Old York Road, Elkins Park, PA 19027.