Graphic of dirty wall and floor with open paint tube from which paint is oozing, hand with spray bottle, lettering "Wohngifte" in the center of the image.
Air quality

Residential toxins: what substances are there, how dangerous are they & how can you protect yourself?

Indoor air can make people ill. This is because toxic substances, so-called residential toxins, often float unnoticed in it. Take action before you become chronically burdened by the effects and investigate the causes of initial complaints. We present the 8 most important indoor air toxins, reveal sources of pollution and tell you how to protect yourself from toxins.

Author:

Undine Jaehne

Date:

3.3.2023

Environmental toxins hide in a wide variety of materials, such as building products, furniture or other furnishings, and emit harmful pollutants into the ambient air. This is a health hazard, especially in closed rooms. We clarify the most important questions around the toxins:

  1. What are environmental toxins or residential toxins?
  2. What are the residential toxins?
  3. Where do residential toxins lurk?
  4. What ailments are triggered by residential toxins?
  5. How can you protect yourself from residential toxins?

1. what are environmental toxins or residential toxins?

The pollution of our ambient air is increasing. New products and modern materials are given supposedly more attractive properties with the help of chemical additives: for example, they are longer-lasting, more resistant, more color-intensive or easier to maintain. The reason for these amenities lies in the chemical treatment of the objects. But the products release the substances again in small doses - to our indoor air and thus to our bodies via respiration. In this way, concentrations that burden our health quickly add up.

Residential toxins are all substances that occur in inhabited rooms and impair the well-being of people who spend time indoors or even damage their health. 

2. what are the residential poisons?

Mold spores 

Mold is one of the most widespread indoor pathogens. The development of spores is favored by moisture and insufficient air exchange. If moisture accumulates on cold surfaces and walls, there is a risk of mold growth. A musty smell as well as dark speckles announce the residential poison, which usually appears in damp rooms such as the bathroom, in unheated rooms such as the bedroom or in cold bridges at the window frame.

Reading tip: Do you notice a musty smell in your home, but can't find the cause? In our article you will learn how to detect hidden mold.

Black mold on a wall
Mold in the home can cause numerous ailments & chronic illnesses.

Formaldehyde 

The universal solvent formaldehyde (CH₂O) is used in the production of plastics, such as urea and phenolic resins. The cosmetics industry uses the substance as a preservative. It is also used as a smoothing agent in textile finishing. Formaldehyde compounds are volatile. This means that they are gradually exhaled by their carrier material. The home toxin enters the interior primarily via wooden furniture. But carpets and other home textiles can also be contaminated.

Plasticizer

Plasticizers are used to make brittle materials such as plastics more pliable. The most common pollutants are phthalates (phthalic acid esters) nonylphenol. Favored by sunlight, humidity, room temperature and physical stress, the chemical compounds become gaseous and escape. The substances can also be absorbed through friction and contact with the skin. This is how plasticizers from toys or PVC and linoleum flooring enter our organism. Since plasticizers have a special molecular structure, they can act in the body in a similar way to hormones. The environmental toxins even get into the groundwater via wastewater. 

Volatile organic compounds (VOC)

Solvents make paints and varnishes brushable and sprayable. They are also present in other household products: for example, in cleaning agents, adhesives or dyes. Solvents often consist of volatile organic compounds (VOCs). Due to their very low boiling point, VOCs become gaseous even at room temperature and evaporate into their surroundings. How dangerous the substance is depends in each case on the boiling point of the solvents used. The lower the boiling point, the faster the residential toxin becomes gaseous and enters the room air. The small particles then enter the bodies of humans and animals through respiration.

Flame retardant

Flame retardants occur primarily in textiles and insulation materials. They are used to reduce the flammability of products. They are therefore also used in the manufacture of upholstered furniture or electronic devices. Agents containing phosphorus or halogen are harmful to health.

Wood preservative

Wood preservatives are generally more of a legacy. Up until the 1980s, wood preservatives were still enriched with the chemicals PCP and lindane, which are classified as carcinogenic and damaging to the nerves. If you are planning to convert the roof of your existing property, you should urgently wear mouth and nose protection when sanding it down. This is because you could kick up and inhale toxic dust. In addition, the fine dust could spread throughout the house and contaminate other rooms.

Even today, some wood preservatives contain substances that are harmful to health, such as PCP. In addition to wood, the residential toxin is also used to treat other materials such as leather. But wood treatment products based on linseed oil or wax also release components into the ambient air, which can combine with oxygen and oxidize to form alarming aldehydes. There are also natural solvents such as terpenes that are emitted from untreated woods. Sensitive people can also react to these.

Pesticides

Pests such as moths like to infest textiles and nest in upholstered furniture, food or carpets. To prevent this, furniture is treated with appropriate protective agents. Actually, pyrethroid is of natural origin. However, many insecticides consist of chemically modified variants and are harmful to health, for example the variants falsely labeled as bio-insecticides that are used for pest control in carpets.

Moths on a shrieking white striped surface
Insecticides emit dangerous residential toxins.

Tobacco smoke

Cigarette smoke is harmful. And not only directly during smoking, but also for a long time afterwards. This is because the tobacco residues spread throughout the room with the smoke and are deposited on various surfaces. From here, they enter the room air again and again. By the way, this does not only affect standard cigarettes. Our practical investigation shows that e-shishas also have a strong impact on indoor air quality. If you want to know what effects vaping in the home has, our self-experiment is interesting for you.

3. where do residential toxins lurk?

Residential toxins can be found in a variety of materials. Our table lists the most important sources of pollutants.

Residential Toxic possible sources
Mold behind furniture/window niches: wherever there is moisture, stagnant moisture, cold bridges
Formaldehyde Insulation materials, adhesives for chipboard/wood materials, varnishes, wall paints, carpets & other home textiles
Plasticizer Toys, cosmetics, paints, varnishes, building plaster, floor coverings, carpets
VOC Paints, adhesives, plastic floor coverings, furniture, floor coverings, room air fresheners, varnishes, building materials
Flame retardant flooring, insulation, paints, curtains, electrical wiring
Wood preservative Wood furniture, chipboard & lumber, paints (e.g. for windows & doors), varnishes, stains
Pesticides Furniture (with textile covering), floor coverings, facade paint, primers, wood stains, insect spray, insect/pest traps.
Tobacco Smoking in the home of "regular" cigarettes as well as e-cigarettes


4. what complaints do residential toxins cause?

Residential toxins sometimes outgas slowly, deposit on dust particles and surfaces, and pollute air quality over long periods of time. Attached to small particles such as house dust, they are distributed throughout the home. The pollutants enter the body through skin contact or when inhaled. Our following table lists the complaints and health effects triggered by the respective residential toxins.

Collage 2 images: left woman holding her STirn and closed eyes, right woman wrapped in blanket and coughing into handkerchief
Residential toxins can lead to physical discomfort as well as adverse health effects.
Residential Toxic Health risks & complaints
Mold Irritation of eyes & respiratory tract, asthma, dry or reddened skin, odor & taste disorders, fatigue, concentration disorders, headaches, irritable cough, gastrointestinal complaints.
Formaldehyde Headache, nausea, asthma, irritation of nasopharynx/pharyngeal mucosa/upper respiratory tract, conjunctivitis, allergies, eczema, cancer, kidney damage.
Plasticizer Infertility, reproductive toxicity in the fetus, liver & kidney damage.
VOC Headaches, burning eyes, general malaise, sleep disturbances, constant fatigue, reduced performance, allergies, infertility,cancer.
Flame retardant Cancer, nerve damage, impotence
Wood preservative Immunodeficiency, headaches, nerve damage, nervous system damage, skin irritation/allergies, sleep & concentration disorders, skin irritation, irritation of mucous membranes when inhaled.
Pesticides Hormonal effects, cancer, resistance of bacteria to antibiotics.
Tobacco cancer, nerve damage, impotence, lung damage, asthma


5. how to protect yourself from residential toxins?

Ideally, you already avoid the most important pathogens when building a house or buying new furniture as well as other furnishings. However, it is not always possible to design your own four walls completely free of harmful substances. A start is made, however, if you find the source of a burden and react accordingly.

Smell sample

Many residential toxins can be smelled. So if you notice the typical synthetic "new smell", take it as the first warning sign of a high concentration of pollutants. One cause of the unpleasant smell of new furniture or home textiles can be volatile organic compounds or plasticizers. For this reason, you should ventilate particularly intensively in the first few days after purchase. If, despite airing, the "new smell" does not subside even after a few weeks, we recommend using a special measuring device for more precise measurement or filing a complaint.

Observe quality seals, certificates & ingredients

The pollutant load in furniture, toys, cleaning agents or building materials can be high. In order to avoid toxic substances, take a closer look at the certifications as well as information on the ingredients of your desired products and pay attention to home-healthy building materials as well as furnishings when purchasing your furnishings or building materials. The Blue Angel seal or the Natureplus label provide good orientation.

Products that fall under the Decopaint Directive can be identified by a corresponding label. You will also find the solvent content written out on the packaging. Only use spray paints outdoors or in adequately ventilated rooms, or use alternative water-based products. In general, you can avoid wood preservatives indoors or at least use solvent- and terpene-free products. The same applies to pesticides. Prefer untreated products, prevent mold through adequate ventilation, and fight moths with natural remedies such as lavender sachets rather than chemical mace.

Also, instead of cheap plastic, opt for natural materials with an environmental seal - this is especially true for toddlers' toys, as these toys are still frequently put in the mouth and thus plasticizers enter the organism even more quickly.

Air measurement with the air-Q

We take 21,600 breaths a day. So it's good to know whether and which residential toxins are hiding within your own four walls. With the air-Q air measuring device, you can check your indoor air, determine air pollutants and analyze the air quality. For this purpose, the air-Q offers you up to 14 different sensors that check different air components in real time. Thanks to the intuitive LED traffic light on the device, you can reliably find out how the air quality is changing. With the air-Q smartphone app or web app, you keep everything in view and receive detailed evaluations - for your health and safety. Individual alarms and push notifications warn you immediately in acute cases.

Gray ofa in the background, in the foreground the air-Q air meter is standing next to a tablet on which the air-Q app is open on a wooden table
The air-Q air meter detects residential toxins in indoor air & reliably warns you.

Airing

Poor ventilation of living spaces is the main cause of mold, which is a poison for the home. Prevent the formation of spores by proper ventilation and ensure regular air exchange. Ventilation can also serve to reduce other residential toxins in addition to preventing mold. For example, the concentration of formaldehyde or VOCs in indoor air can be reduced by regular air exchange. To do this, open the windows wide for a short time and ideally ensure a draught with the help of opposite windows. The air exchange removes a large part of the air humidity and thus deprives the spores of their breeding ground. You can directly check how long you should ventilate with an air measuring device.

Also, make sure that the heating is set appropriately, because warm air can absorb significantly more moisture than cold air. We have prepared separate guides for you on the subject of mold in the home and demand-oriented ventilation. For example: "When does ventilation start?", "Ventilate properly: The best tips" and "Wintertime= mold in the apartment?"

Air purification

In addition to air purifiers that work with filters, various green plants also help to improve air quality. Some plant species can even clean the air from pollutants, filtering substances such as formaldehyde. Particularly suitable for this purpose are bow hemp, ivy or dragon tree. In various practical tests, we used our air-Q air measuring device to determine how plants affect the composition of air constituents. In this way, we were able to clarifythefollowing questions: "Do plants help to improve the air quality?", "Which plants aresuitable for the bedroom?", "Isthe houseplant dragon tree suitable for the bedroom?", and we also checked whether planters also have an air-purifying effect.

References

Contribution image:

Collage air-Q/canva.com; ChrisSteer from Getty Images Signature; RR-Photos from Getty Images Signature; Collage Pavel Danilyuk from Pexels & cottonbro from Pexels; Self-editing air-Q/canva.com)

Residential toxins: what substances are there, how dangerous are they & how can you protect yourself?
air-Q Air Quality Meter

Monitor air quality, all air components and environmental influences with the air-Q. For your health and performance.