Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
αιθάλησ of soot LXX.Exod.9.8
αιθάλην soot LXX.Exod.9.10

Liddell-Scott-Jones

αἰθάλη (aithalē) soot G:N-F

αἰθάλη, ,

(αἴθω) ={αἴθαλος}, especially soot [LXX+5th c.BC+]

__II sublimed vapour, [Refs 1st c.BC+]

LSJ Scripture Refs: LXX.Exod.9.8