Linseed oil and boiled linseed oil are NOT the same. They do both contain the same
linseed oil, but boiled linseed oil contains dryers, usually some sort of metals.
The linseed oil won't dry as fast. (some say never) The linseed oil you purchased is
used to make paints. Some say that the oil paints never completely dry. I don't know
if that's true, the person who told me that also told me that it is aerodynamically
impossible for a bumblebee to fly. (yet it does, so what does that tell you?)
Any hardware store would have it .. or Walmart or Home Despot .. True Value etc.
They keep it near the paint thinner, denatured alcohol, naptha, brush cleaner, paint
strippers etc..
Ken is right about it being flammable. When the air hits it, it will generate heat.
Remember the stories about 'oily rags' that catch fire spontaneously? This is the
stuff that does it. Wash out the rag with soap and water, then put them outside
to dry. Then they should be fine to put in the trash.