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Frequently asked questions

At Evonik, we value open communication about nanomaterials and the safety of our silica. Our customers’ trust is very important to us, as is that of consumers.The following provides answers to frequent questions.

For interested public: In the first section you will find easy-to-understand answers to any number of questions.

For experts: More detailed, scientific answers are also available for many questions. You can find these under the subheading "I'd like to know more!"

  • What is silica (and what are the differences between the various types of silica)?
  • What exactly is SAS?
  • Why is silica needed? What is it used for?
  • How can Evonik serve so many different applications and effects with a single product class?
  • Is Silica safe?
  • Is silica safe as a food additive (E 551)?
  • What happens to SAS in the body?
  • Can SAS enter the body through the skin?
  • Is synthetic amorphous silica (SAS) dangerous?
  • How can silica enter the body?
  • How much silica do I absorb into my body each day?
  • What is the size of Evonik’s silica particles?
  • What does nano actually mean?
  • Do you find nano products in nature?
  • Is Nano a new product class?
  • How do the nanomaterials produced by Evonik have to be labeled and registered?
  • What is Nanomaterial?
  • What does nanostructured mean?
  • What does "nanotechnology" stand for?
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