A 16-year-old found guilty of throwing acid at a woman on her doorstep will serve six years in prison for the attack.
The teenager, who can now be named as Liam Robert Sibbons, was sentenced to eight years and three months but will serve six, with the remaining time served concurrently with a supervision order.
Sibbons' victim, Tara Quigley, 28, who did not know her attacker, suffered horrific injuries to her face and upper body when she was doused with acid at her home in Romford, Essex, on April 30.
Miss Quigley suffered burns to 7% of her body, including her right arm, forearm, shoulder, chest, neck and face and has been left permanently scarred.
She will need regular treatment over the next four years and is due to undergo another operation shortly.
Miss Quigley had been waiting for someone to deliver cannabis on the evening of the attack when she saw someone approaching the house, the court heard.
She opened the door to Sibbons, who asked to speak to "Michelle" at around 9pm.
The teen returned 10 minutes later and squirted an acidic substance into Miss Quigley's face, according to police.
Miss Quigley managed to shut the door after the assault and rinse her face with water while an ambulance was called.
Her pet dog - a long-haired Chihuahua - also required treatment but the animal is not thought to have suffered any long-term injuries.
In a victim impact statement, Miss Quigley, who was in court to see her attacker jailed and wept as details were read out, said: "The attack has left me feeling as though my life has been blown apart.
"I have been left both physically and emotional scarred, and am in constant pain and discomfort owing to burns on my face, chest and arms."
She said her life had been turned upside down and that she did not feel safe returning to her home.
"I have lost confidence in my physical appearance and feel that people will stare at me when they see the scars," she said in her statement, describing the aftermath of the attack as "crushingly stressful".
Sibbons received an acid burn to the left side of his chest in the attack, the court heard.
He has four previous convictions and was on bail at the time of the attack.
Judge David Radford said Sibbons was a drug user who was already known to the police before the events of April 30.
He said a large amount of money had been found after the teenager was arrested, adding: "Another view could be that he was paid to undertake this."
Sibbons, wearing a white shirt and dark tie, remained impassive and stared straight ahead as he was sentenced.
Prosecutor Martin Whitehouse told Snaresbrook Crown Court: "This was an horrific attack, involving a degree of brutality and callousness rarely encountered.
"Almost, one might say, beyond comprehension."
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