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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: makonys on August 11, 2005, 11:15:15 PM

Title: colored gas
Post by: makonys on August 11, 2005, 11:15:15 PM

I would like to color natual gas or propane (red green purple)Bubble it up through water set it on fire. Can this be done?Iam a sculptor not a chemist. Gas suppliers no help.THANK YOU   Marc

Title: Re:colored gas
Post by: oldddog on August 12, 2005, 04:43:56 AM

If you introduced a stream of Br2 (bromine) into propane you'd get the red and I2 (iodine) you'd get purple and I can't think of a green gas at present. But this would be very hazardous! Why do you want to do this?

Title: Re:colored gas
Post by: Benzene265 on August 12, 2005, 05:23:48 AM

Chlorine is greenish yellow.  Also, all colored gases I can think of are highly toxic.

Powdered dye, maybe?

Title: Re:colored gas
Post by: HP on August 12, 2005, 02:07:09 PM

I suggest you to try with some inorganic salts which can very effectively to colour the fireing gas. For example if you pour some cotton on the gas duze or dry the conc water solution of the salt on the fire duze with Lithium or Stroncium nitrate the fire will colour red(theres some difference the colour intensity). For green i think Barium nitrate is good also Cuprium salts i think are readily available. For yellow the salt is good;)