Old Flaxseed Oil
Linseed oil, Rancid
Recyclable?
Blue Bins & Chutes
Other Recycling
Recommended
Freecycle / Give Away
Offer in online groups like Art Don't throw or in platforms like Olio. Even when rancid, this can be repurposed.
Online Freecycle Groups
Olio
Art Don't Throw
Alternative
Reuse
Linseed has special properties which make it the top choice for seasoning cast iron pans and also as the base for many oil based paints.
Linseed oil can thin the consistency of paint, making it smoother and easier to mix with other pigments that are used to color paint.
Alternative
Trash
While technically recyclable into bio-gas, the volumes of flaxseed oil make it unsuitable for recycling.
The glass bottle is, however, recyclable so put the oil into a sealed plastic disposable bottle when you throw it out.
Then clean the empty bottle and recycle it per the info here.