Combustion of LPG in chlorine

LPG burns in chlorine gas forming black smoke

Scientific name: LPG reacts with chlorine


Горение пропан-бутановой смеси в хлоре

by Vit105


Wear eye protection and lab gloves.

There is a serious fire risk - a fire extinguisher should be ready. Make sure there is nothing flammable nearby.

This experiment must be performed in a well-ventilated room or in a fume hood.

Always follow general safety recommendations. Please note that conducting chemistry experiments you must comply with the relevant legal procedures in your country.

Reaction formula

C3H8 + 4Cl2 → 3C + 8HCl

Step-by-step instruction

WARNING! This experiment is dangerous! You should NOT perform this at home. ONLY carry out this experiment, if you are a trained chemist, and you understand local safety and legal requirements, which are required to perform such experiments

  1. Fill a flask with chlorine and close it.
  2. Connect a glass tube with a LPG balloon using a flexible hose.
  3. Open a LPG feed and ignite the gas.
  4. Open the flask and put the glass tube inside. LPG burns in chlorine forming dense black smoke.

Scientific background

Liquid petroleum gas (LPG) consists of propane and butane. They react with chlorine forming hydrogen chloride and carbon. It is carbon which forms black smoke.


Published on 01 July 2015

  • Fire
  • Heating with fire
  • Explosion
  • Poisoned gas
  • Organic
  • Electricity
  • Solution
  • Oxidation reduction
  • Color change
  • Precipitate
  • Gassing
  • Catalyst