A Longueuil woman is in a coma, with serious burns to her upper body, after she was attacked with a household acid Sunday.

A Brossard man, 27-year-old Nikolas Stefanatos, appeared in court in Longueuil Monday. He was charged with aggravated assault and remains in custody.

Longueuil police spokesperson Martin Simard called the attack a case of conjugal violence. He said police were called to the woman's apartment on Ste-Catherine Street at around 5 a.m. Sunday.

The woman, identified as Tanya St-Arnaud, 29, had burns to her face, arms and upper body, caused by a household product containing acid, Simard said.

"We know that the product is very dangerous for the skin if it's not diluted," Simard said. "The woman was taken to the hospital."

Simard said authorities do not fear for her life, but the woman is in a coma — likely medically-induced — so it will be some time before investigators are able to interview her for her version of the events.

Simard said St-Arnaud's assailant fled the apartment immediately after the attack but was picked up by police a few hours later.

Stefanatos is to appear in court for a bail hearing on Friday.

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  • An Afghan woman, her face scarred from a

    An Afghan woman, her face scarred from an acid attack, marches with other demonstrators to protest the recent public execution of a young woman for alleged adultery, in Kabul on July 11, 2012. Dozens of Afghan women's rights activists took to the streets July 11 to protest the recent public execution of a young woman for alleged adultery, which was captured in ahorrific video. AFP PHOTO/Massoud HOSSAINI (Photo credit should read MASSOUD HOSSAINI/AFP/GettyImages)

  • Acid attack victim Patricia Lefranc spea

    Acid attack victim Patricia Lefranc speaks to a journalist ahead of the assize trial of Richard Remes, outside the Assize Court of Brussels in Brussels on March 21, 2012. Richard Remes stands accused of attempted murder, after he attacked his ex-girlfriend Patricia Lefranc by throwing acid in her face. AFP PHOTO/ BELGA / DRIES LUYTEN (Photo credit should read DRIES LUYTEN/AFP/Getty Images)

  • Acid attack victim and former Pakistani

    Acid attack victim and former Pakistani soldier Farooq, 24, holds up a portrait of himself before his disfigurement at Basti Maluk village in Multan on March 16, 2012. Acid attacks are among the worst forms of domestic violence in Pakistan and mostly directed at women, who are too often classified as second-class citizens. Victims are disfigured for life and ostracised by society. Pakistan's parliament late last year adopted tougher penalties for the crime, increasing the punishment to between 14 years and life, and a minimum fine of one million rupees (11,000 USD). AFP PHOTO / Bay ISMOYO (Photo credit should read BAY ISMOYO/AFP/Getty Images)

  • Acid attack victim Asiya Bibe, 35, poses

    Acid attack victim Asiya Bibe, 35, poses with a portrait before her disfigurement at her residence at Bahawalpur district in Multan on March 16, 2012. Acid attacks are among the worst forms of domestic violence in Pakistan and mostly directed at women, who are too often classified as second-class citizens. Victims are disfigured for life and ostracised by society. Pakistan's parliament late last year adopted tougher penalties for the crime, increasing the punishment to between 14 years and life, and a minimum fine of one million rupees (11,000 USD). AFP PHOTO / Bay ISMOYO (Photo credit should read BAY ISMOYO/AFP/Getty Images)

  • Shamim (R) and her daugher Safiea (L), b

    Shamim (R) and her daugher Safiea (L), both victims of acid attacks, prepare food for their livestock at Khanwala village in Multan on March 15, 2012. Acid attacks are among the worst forms of domestic violence in Pakistan and mostly directed at women, who are too often classified as second-class citizens. Victims are disfigured for life and ostracised by society. Pakistan's parliament late last year adopted tougher penalties for the crime, increasing the punishment to between 14 years and life, and a minimum fine of one million rupees (11,000 USD). AFP PHOTO / Bay ISMOYO (Photo credit should read BAY ISMOYO/AFP/Getty Images)

  • Acid attack victim Safiea, 18, poses at

    Acid attack victim Safiea, 18, poses at her residence at Khanwala village in Multan on March 15, 2012. Acid attacks are among the worst forms of domestic violence in Pakistan and mostly directed at women, who are too often classified as second-class citizens. Victims are disfigured for life and ostracised by society. Pakistan's parliament late last year adopted tougher penalties for the crime, increasing the punishment to between 14 years and life, and a minimum fine of one million rupees (11,000 USD). AFP PHOTO / Bay ISMOYO (Photo credit should read BAY ISMOYO/AFP/Getty Images)