The (r)evolution of laundry detergents and softeners: proven skin compatibility

When developing laundry detergents and fabric softeners, the focus is usually on cleaning performance and the effect on the fibres and shaping of textiles. For some years now, environmental properties have additionally gained in importance, as this topic increasingly concerns the public and more and more people are interested in reducing their ecological footprint.

The ideal product, however, should master another challenge: it should be skin-compatible and cause neither skin irritations nor allergic reactions. The cooperation with Dermatest GmbH, an independent dermatological institute for testing the safety and skin compatibility of industrial products, marks Tana-Chemie’s pioneering role. The sustainable detergents and fabric softeners of the Green Care Professional brand have been successfully tested and have been awarded the Dermatest seal for proven skin compatibility.

The Dermetest seal of approval is a scientific label for independently tested products which come into contact with the skin. Products which are labelled with this seal have proven their safety in terms of exposure time and site of application in patch tests. Exceptional safety when it comes to your skin!

Our skin is only a few millimetres thick. And yet it protects us from many dangerous environmental influences and performs vital functions for the body. It prevents the penetration of pathogens, fungi and moisture, houses nerve fibres, immune defence cells, touch receptors, blood and lymph vessels, stores energy and serves as a heat insulator. It also plays a significant role in our well-being. Daily contact with hundreds of substances, liquids and surfaces poses a great challenge and danger to the skin. Textiles, and thus also the detergents and fabric softeners used, are in particularly long-term and extensive contact with our skin on a daily basis. Additional friction can also irritate the skin. Therefore, the skin compatibility of these products is particularly important. 

In order to meet this demand for its products, Tana-Chemie had the skin compatibility and safety of the Green Care Professional detergents and fabric softeners tested by Dermatest GmbH. Epicutaneous tests of the use concentrations according to the application instructions were carried out on volunteers under dermatological control. These tests follow internationally recognised guidelines*: 

• At least 30 test persons are selected for each test 
• Male and female test subjects are included regardless of the subsequent target group of the product 
• All test persons are older than 18 years 
• By selecting certain skin types, e.g. sensitive or atopic skin, the tolerance for certain products and skin types can be tested 
• The one-time contact in the context of a test is intensified in comparison to the later application in order to achieve a meaningful result 

For testing, the test products are applied in a suitable concentration to a self-adhesive patch and stuck on under occlusive (closed) conditions for 24h. The occlusive conditions under the patch intensify the contact of the skin with the product, which increases the significance of the result. The assessment of possible skin reactions is carried out according to the recommendations of ISO 10993-23:2021 (Section 8, Annex E). 

Since the course of the reactions provides information about the type of reaction (allergic or irritant), three readings are the quality standard at Dermatest. The first assessment takes place 30 to 60 minutes after removal of the patch, a second and third reading takes place 24 and 48 hours after the first reading. 

Only when the product has successfully passed this test is the Dermatest seal and the rating „dermatologically tested” awarded. 

The detergents and fabric softeners in the Green Care Professional line have successfully passed the tests and have thus been awarded the Dermatest seal and are thus proven to be skin-friendly and safe to use. 

* (10993-23:2021, Section 8 and Annex E (Irritation testing of medical devices on human skin), the guideline of the German Dermatological Society (DDG) and the German Society for Allergology and Clinical Immunology (DGAKI) on „Performance of the epicutaneous test with contact allergens” (AWMF guideline register). 

About the Dermatest GmbH

Dermatest protects your skin. Since 1978. The independent dermatological institute tests all substances and items that come into contact with the skin for safety and skin compatibility and awards safe products with the Dermatest seal. The effectiveness of cosmetics is also independently checked at Dermatest. A large team of scientists from dermatology, allergology, food chemistry and biology ensures scientific competence and accuracy. Many tests are carried out with the help of volunteers, some of whom have been working with Dermatest for years. All tests take place under medical supervision and in accordance with international guidelines. Since 2009, Dermatest’s quality management system has been certified according to DIN EN ISO 9001 and audited by TÜV Rheinland.