The EU's D6 control measures have tightened further, officially including D6 (CAS No. 540-97-6) in the strict control list.
This has become a new threshold that organic silicon exporters must overcome. As a reliable supplier of high-purity dodecamethylcyclohexasiloxane, IOTA responds to market concerns with real detection data, helping downstream customers handle compliance reviews with ease.

1. Policy Overview: D6 officially enters the EU control list
In February 2026, the European Chemicals Agency officially included dodecamethylcyclohexasiloxane (D6, CAS No. 540-97-6) in the list of substances of very high concern. According to EU regulations, if the content of D6 in substances or mixtures exported to the EU is ≥ 0.1% (1000 ppm), a SVHC notification obligation is triggered; in sensitive fields such as cosmetics, electronics, and textiles, customers generally require D6 to be < 100 ppm (0.01%), with unprecedented control intensity.


2. Industry pain point: Why is D6 still detected to exceed the standard despite being labeled as "low-ring body"
Many manufacturers only use simple evaporation treatment， which can reduce D4/D5， but has limited effect on the removal of high boiling point (245°C) D6. In third-party tests， D6 still reaches 300–800 ppm. Some "no D4/D5" claims have not even tested D6， causing downstream customers to be caught off guard during REACH reviews and facing the risk of order suspension.


3. Tough Quality Control： IOTA-D6 Uses Data to Guard the Export Channel
IOTA has comprehensively upgraded its quality control system： using high-resolution GC-MS for simultaneous quantitative determination of D4， D5， and D6； the measured value of D6 in ultra-low ring body batches is < 50 ppm (typical value 20–40 ppm)； each batch comes with a complete ring body detection report and chromatogram， clearly marking the D6 peak area and quantitative results； supporting the data package required for SCIP database notification， achieving full control of the three-ring bodies (D4 + D5 + D6) < 100 ppm.


4. Customer Q&A： What are your concerns about D6 compliance
Each batch is accompanied by a complete ring body detection report and chromatogram, clearly marking the peak area of D6 and the quantitative results.
- A： D6 has a high boiling point， and ordinary evaporation is difficult to remove. Special distillation combined with high-resolution detection is needed for dual protection.
- Q： What compliance documents can IOTA-D6 provide?
- A： Each batch provides a GC-MS test report， chromatogram， and SCIP notification data package， which is real and traceable.
- Q： What is the D6 limit requirement?
- A： Generally， in the EU， it is ≥ 0.1% and requires notification.