Remove mold with chlorine - what are the risks?


In addition to the tried-and-tested home remedies, chlorine-containing products are also frequently used to remove mold. How effective these products are, where they can be used, and what potential disadvantages chlorine-based mold removers can have is explained in this article.

mold disinfectant

Only superficially present mold, which has not yet penetrated the surface, can also be treated with chemical products. However, as soon as larger areas are affected (more than about half a square meter) or the mold is already found in the depth of the material, a professional renovation is inevitable. Chemical remedies are then generally no longer sufficient.

Effect of disinfection

Mold is a fungus and therefore a living thing. Just like other microorganisms (bacteria and protozoa), it is therefore also susceptible to disinfecting substances. In addition to the common home remedies home remedies and chlorine is a disinfectant acting chemical substance. As a home remedy apply especially:

  • Alcohols (for disinfection over 70%)
  • Alcohol or methylated spirits (ethanol, hence an alcohol)
  • Hydrogen peroxide (strong oxidizing and bleaching agent, also used to bleach hair)

Properties of chlorine

Chlorine is a very strong oxidizing agent. In this capacity it is used as so-called hypochlorous acid. Although it is only a weak acid, but a very strong oxidizing agent, which also has a strong bleaching effect. Mold removers also contain other chlorine-releasing compounds.

Mode of action of chlorine

Chlorine immediately destroys the walls of cells in mold. That kills him immediately. It also has a destructive effect on the spores, so that even the spores required for a new formation of mold no longer pose a risk. The effectiveness is fast and reliable

health hazards

Chlorine-containing products can cause severe chemical burns by conversion of the chlorine components contained. Even with small doses you should remove the mold in any case very carefully, and always wear gloves.

Chlorine cleaner in the household

In the household sector, cleaners are also used which also have a disinfectant effect, which can also be slightly chlorine-containing (for example, Danchlor). However, they are not quite as effective (because of lower chlorine dose) as special mildew cleaners.

Possible disadvantages of chlorine-containing mold removers

  • numerous material incompatibilities (on some surfaces chlorine can cause discoloration, fading or destruction of the surface)
  • During use, vapors are produced which can be very unpleasant and dangerous for the health of longer-term inhalation. These fumes sometimes remain in rooms for a while
  • Danger of explosion of many chlorine products (always keep away from sources of ignition)
  • water-damaging effect of chlorine when it enters the wastewater

Basic safety instructions during use

  • It is essential to observe the safety instructions of the manufacturer
  • Always wear thick rubber gloves when using this product
  • Always protect your eyes while using
  • Avoid contact with the skin as much as possible (can be highly corrosive)
  • always ventilate adequately during use so that no dangerous vapors can accumulate (respiratory and eye irritation, mucous membrane irritation)

Tips & Tricks

Never mix chlorine-containing agents with other cleaners, and never with acids!


Video Board: Does Chlorine Bleach Kill Mold?