The red circle found on LPG cylinders in Indonesia indicates they contain flammable gas, a spokesperson for the country's state energy firm told AFP, contrary to social media posts shared thousands of times that falsely claimed it indicated whether the container was safe. The spokesperson also said an odour is mixed with the gas during production so that those nearby can detect a leak.
"If the red circle has changed to black that means the cylinder is no longer safe. Better avoid it and look for a safe place. Get out of the house because the cylinder would then be VERY DANGEROUS."