The actor plays bad boy Brendan Brady on the show, and the character is involved in a "huge explosion" in one of next week's special post-watershed episodes.
Scanlan told PA: "It was a massive, massive explosion that they did and they had one shot of it, one go to get this right.
"I begged to be able to do the stunt myself. I put a request in over and over and over again. It's just a typical actor thing, you want to be part of everything that you do but you understand that there are professionals who do this for a living. If I get injured and there's just one take, that kind of screws up all the filming and scheduling in afterwards."
Scanlan then revealed that this led to a light-hearted rivalry with his stuntman replacement: "They brought in a stunt double, he had to shave his beard down to a handlebar moustache and he was then known for the rest of the day as 'Hot Brendan'. I hated him!"
He also revealed that an upcoming Hollyoaks Later storyline will feature a lads' trip to Amsterdam, but that Brendan won't be involved. He joked: "I think they were quite smart not to let the Bradys go off to Amsterdam. I think one or two of us wouldn't have come back."
Scanlan had previously revealed that this next batch of episodes will unveil "brutal" details of Brendan's past that are set to shock fans.
A 12-minute preview of Hollyoaks Later is set to air online on the E4 website tonight (September 14) from 7pm.