The 23-year-old recently took in a spell on trial at Bloomfield Road, which saw him figure in a friendly outing.
He may not have been around the club for long, but he made a positive impression on Seasiders boss Paul Ince.
He feels Sow is worth bringing on board full-time, and terms are about to be tabled.
Swedish outfit Syrianska appreciate that they cannot compete with a Championship club and expect a deal with Blackpool to be completed shortly.
Sporting director Jan Girgo told Fotbolldirekt.se: "It looks like Osman will leave us.
"We would like to keep him, but I can understand that it is difficult to reject a lucrative offer from there.
"There is still a chance, but it is not likely that he will stay with us."