HELP Canned Air or Canned Gas all you chemists

[song]

I was using canned air to finalize the cleaning of my diamond. First the ultrasonic cleaner, then the steam from the cappachino maker and finally a quick spray from a can of compressed air.

Today I bought a different brand of canned air because mine was out of stock. It says canned gas though, which has the ingredient 1,1-difluoroethane in it. People use canned air and canned gas for computer keyboards etc. The products are sold for that purpose, both canned air and gas. Is this ok to use on my stone? I didn''t keep the last can so I don''t know if it has the ingredient in it. (If it does, it''s fine, because a jeweller recommended canned air. If it''s got 1,1-difluoroethane in it like the canned gas, I have nothing to worry about.

I don''t want to be spraying my diamond with something that could hurt it. Is there a difference between canned air and canned gas???

Thanks so much, ~song

 

[pulp_princess]

I'm sure the canned gas will be just fine on your stone. 1,1-difluoroethane is commonly used as a propellant. Does the can say what percentage it is? I suppose canned air is simply compressed air, while canned gas could be anything gaseous. I would only be worried about the fumes unless it does not say "Use in a well-ventilated area", or something to that effect. Most compressed gases will say it should not be exposed to high temperatures since it will build up pressure in the can.

 

[song]

It's warning is to not shake can, do not spray on skin, because it will cause a severe burn.(Frost bite) Use in adequate ventilation and store in adequate ventilation. Contains 100% 1,1 - difluoroethane (CAS#75-37-6). I do not see any other ingredients. ~song

 

[pulp_princess]

It won't hurt the diamond at all. I'd just take it outside if you're going to be spraying heavily.

The burn will likely be from the gas pressure, but not the gas itself.

 

[song]

Thanks so much for taking the time to help me!

~song

 

[stumpy]

The change of state from liquid to gas (condescension, a condition seen on SOME diamond and jewelery forums), is an endothermic reaction, one that absorbs heat.

This is why the "air" spray cans turn cold upon use, and the gas expelled is chilly.

Anyway, that's what my uncle Crazy Looie tells me.