What is the best raw material for a sublimation experiment?

Question

it needs to be cheap and available.
It also need to be safe that the raw material and its product after sublimation (gas) are not toxic.

-it needs to be cheap and available.
-It also need to be safe that the raw material and its product after sublimation (gas) are not toxic
-it needs to stay at solid phase in room temperature

1 second ago
-it needs to be cheap and available.
-It also need to be safe that the raw material and its product after sublimation (gas) are not toxic
-it needs to stay at solid phase in room temperature
-can be demonstrated with the use of a sublimation apparatus

Answer 1

Dry ice is the classic example used for sublimation demonstrations. Dry ice is carbon dioxide, CO2, in solid form, and it sublimates at room temperature. It is widely used in solid form as a coolant, and the sublimating gas is used to produce "fog" for theatrics. And as you know, there is plenty of carbon dioxide in the air around us; the amounts that you would produce in an experiment would not be sufficient to deprive anyone of oxygen, so it's non-toxic in that respect (but of course you would suffocate if you had only CO2 and no fresh air). Dry ice is mass-produced, easily stored and transported, and may cost as little as $2 per kilogram. It can be kept in solid form, and then rapidly sublimated by immersing the pellets in water.

Answer 2

Sublimation is the process by which a solid turns directly to a vapour, or a vapour turns directly into a solid, without passing through a liquid phase. Most materials can, in principle, be made to sublime, but often sublimation occurs only at temperatures and pressures that are not readily accessible.

Some common examples of materials that sublime are iodine, ammonium chloride....