H 1350 (OTTO) Hexamethyl disiloxane, 98% Cas 107-46-0 - used in liquid bandages (spray on plasters) such as cavilon spray, to protect damaged skin from irritation from other bodily fluids. H 1350 (OTTO) Hexamethyl disiloxane, 98% Cas 107-46-0 - used to soften and remove adhesive residues left by medical tape and bandages, without causing further skin irritation.