Discarded heat packs also pose safety hazards after use

Discarded heat packs also pose safety hazards after use

Is there a safety hazard when the heating package reacts with water? Not long ago, the Shanghai Consumer Rights Protection Committee reported on the testing of 20 self heating convenient hot pot products. The test results show that the tested heating packages are all substances or mixtures that release flammable gases when exposed to water.

Experts explain that if the amount of hydrogen released after the heating package reaction happens to be at the combustion limit of hydrogen in the environment, that is, when the proportion of hydrogen in the air reaches 4% -75.6%, there is a risk of explosion. Experts also emphasize that there are similar risks in some enclosed or semi enclosed spaces, such as inside a car.

Self heating food may pose a safety risk of explosion not only when used in enclosed spaces. In some public places, intensive and extensive use also poses significant safety hazards.

Xiao Qiuping, Assistant Director of the National Chemical Product Safety Quality Inspection Center:

For example, during the long-distance bus journey, the air conditioning is on in the summer and the trunk is in a closed environment. The excessive use of self heating hot pot may lead to the accumulation of hydrogen gas. If the concentration reaches the lower explosive limit and comes into contact with an ignition source, such as static electricity on the body or sparks in the circuit, it is enough to cause a detonation accident.

In addition, using discarded heat packs also poses a safety hazard. Due to the fact that the reaction between the heating package and water does not require the use of any other substance, as long as the heating package does not react completely, hydrogen gas will be produced when it encounters water.

If the heating package is thrown into the trash can, and on rainy days, rainwater enters the trash can, it will react and produce hydrogen gas. The trash can is a semi enclosed environment, and if there are sources of ignition such as cigarette butts thrown in, there is a risk of explosion or combustion.

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