Ivanov was charged with 23 counts of aggravated harassment as a hate crime and 23 counts of criminal mischief in the fourth degree as a hate crime.
He will be arraigned later today in Brooklyn Criminal Court.
Eyewitness News is told Ivanov was taken into custody yesterday after he shot off the tip of his left finger inside 58 Remsen Street.
When police arrived, they uncovered a cashe of pipe bombs and weapons in a Brooklyn Heights brownstone
Ivanov shared his apartment with a nationally renowned AIDS researcher, Michael Clatts. Police would like to talk to Clatts, who may be out of the country.