Tanya St Arnaud, from Longueuil, Quebec, is currently in a coma at an area hospital.
Police said Nikolas Stefanatos, of Brossard, went to St Arnaud apartment on Ste-Catherine Street around 5:00 a.m. Sunday and attacked her with a household product containing acid.
Twenty-nine year old St-Arnaud suffered burns to her face, arms and upper body. Doctors said although she is in a medically induced coma she will survive her injuries.
Stefanatos was arrested a few hours later and charged with aggravated assault.