Testing of organic cotton

OEKO-TEX® STANDARD 100  includes an optional genetically modified organism (GMO) check for cotton and cotton products. Organic cotton must be certified separately. The result of the test confirms whether or not the material sample contains genetically modified cotton. 

The GMO test is mandatory if you want “Organic Cotton” to be included in the scope of your OEKO-TEX® STANDARD 100 certificate.  

The test is performed in two steps: 

  1. The sample is shredded and the cotton fibers are mechanically and enzymatically digested. The genetic material (DNA) is isolated from the fiber and purified in a multi-stage process. 
  2. If the DNA contains specific marker genes, it is classified as a genetic modification. Control reactions are used to prove that the cotton DNA is unmodified. 


Learn more about GMO testing

Apply for the certification

Learn more about STANDARD 100 

These are the benefits

  • The test can be performed at any stage from the raw cotton to the finished product. 
  • The molecular-biological verification systems have been optimized for cotton products. 
  • Reliable GMO testing results help you to minimize various risks along your supply chain, including:  
    • Mixing of conventional and organic seeds 
    • Contamination from neighbouring cultivation areas 
    • Contamination from internal processing methods
    • Incomplete traceability of the organic cotton