Is Your “Low-Cyclic” Silicone Really D6-Free?-Iota

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News > Dynamic industry > Is Your “Low-Cyclic” Silicone Really D6-Free?

Is Your “Low-Cyclic” Silicone Really D6-Free?

Just as companies adapted to D4/D5 restrictions, the EU struck again: on February 20, 2026, ECHA officially added hexamethylcyclotrisiloxane (D6). Now, any substance or mixture placed on the EU market with D6 ≥ 0.1% (1000 ppm) triggers SVHC notification. Meanwhile, customers in cosmetics, electronics, and textiles are already demanding D6 < 100 ppm (0.01%).

Yet a new compliance crisis looms: many “low-cyclic” silicones still test at 300–800 ppm D6. Why? Some producers use basic devolatilization that removes D4/D5 but struggles with high-boiling D6 (bp 245°C). Worse, some “D4/D5-free” declarations never tested for D6 at all—leaving downstream users exposed during REACH audits.

“We received an urgent notice from a European client: if we can’t prove D6 < 100 ppm by March, all orders are suspended,” shared a cosmetic ingredients exporter.

True compliance requires visibility, measurability, and control. We’ve upgraded our QC system:
✅ High-resolution GC-MS quantifies D4, D5, and D6 simultaneously;
✅ All “ultra-low cyclic” batches test D6 < 50 ppm (typically 20–40 ppm);
✅ Each COA includes full cyclic siloxane report + chromatograms, clearly marking D6 peaks and concentrations;
✅ Support SCIP database submission packages.

Compared to vendors who merely claim “low cyclic” without D6 data, our solution delivers true triple-cyclic control (D4+D5+D6 < 100 ppm)—meeting the EU’s strictest application requirements.

In the REACH era, “not tested” equals “non-compliant.”
Don’t let a missing D6 report block your access to the European market.