Cyclosiloxanes content
Cyclosiloxanes are the primary building blocks of siloxane polymers and ultimately silicone rubber. Hence, cyclosiloxanes can remain in the final silicone article as residual impurities.
Several cyclosiloxanes (D4, D5, D6; see table below) are considered harmful to the environment and human health. These three substances are listed in the REACH Candidate List of substances of very high concern (SVHC).
Substance | CAS N:o | Abbreviation |
|---|---|---|
Octamethylcyclotetrasiloxane | 556-67-2 | D4 |
Decamethylcyclopentasiloxane | 541-02-6 | D5 |
Dodecamethylcyclohexasiloxane | 540-97-6 | D6 |
The Nordic Swan Ecolabel criteria for greaseproof paper sets the limit values for D4, D5, and D6 impurities in silicone coating as 400 ppm per substance and 1000 ppm for the sum of D4, D5, and D6.
- Suitable sample matrices
- Silicone, silicone-coating
- Required sample quantity
- 50 g
- Typical turnaround time
- 4 weeks after receiving the samples
- Detection limit
- LOQ: 0.010 mg/kg
- Available quality systems
- Accredited test method
- Device types
- Method expert
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