Rozental first became active in the Hovevei Zion. The Russian socialist leader Arkadi Kremer was her mathematics teacher and got her involved with the Bund in 1897. Here she met her future husband Pavel (Pinai) Rozental. The couple moved to Bialystok in 1899 where she worked as a dentist. They became involved with the local Bund here after the arrest of the first party leadership. They were arrested in 1902 and banished to Siberia. They were released as result of the Russian Revolution of 1905, they returned to Vilna, where they continued their work in the Bund.
