Hydrated Silica


Texture enhancer

No known benefits

Hydrated Silica at a glance

  • Commonly used to improve the aesthetics of skin care and makeup formulations
  • Helps improve factors related to viscosity, opacity, absorbency, etc.
  • May also be used to coat sunscreen actives, creating a more elegant product
  • Proven track record of safety in cosmetics

Hydrated Silica description

Hydrated silica plays a variety of roles in skin care products, mainly centered around adjusting the aesthetics of formula. For instance, it can be used to control the viscosity and level of opacity. In certain formulations, it can be used as an abrasive scrub particle. Other times it functions as a mattifying agent or as a skin-conditioning agent. Hydrated silica may also be used to coat mineral sunscreen actives, lending an overall more elegant texture and appearance to the formula. It’s often used with titanium dioxide for additional opacity and/or thickening of emulsions. Technically speaking, hydrated silica is a form of silica that has additional water atoms. While its root origin is from naturally occurring minerals, it is produced synthetically for cosmetic use. It is described as a white fluffy powder in its raw material form. In the Cosmetic Ingredient Review assessment conducted in 2019, hydrated silica was deemed safe up to 10% concentration in leave-on skin care products and 33.8% in rinse-off products.

Hydrated Silica references

  • CosmeticsInfo.org, Accessed July 2021, ePublication
  • https://cosmeticsinfo.org/ingredient/hydrated-silica
  • Cosmetic Ingredient Review, October 2019, pages 1-34
  • https://online.personalcarecouncil.org/ctfa-static/online/lists/cir-pdfs/FR466.pdf
  • Toxicological Sciences, September 2011, pages 264-280
  • https://www.deepdyve.com/lp/oxford-university-press/safety-evaluation-of-sunscreen-formulations-containing-titanium-cO07wUNljF?articleList=%2Fsearch%3Fquery%3D%2522hydrated%2Bsilica%2522%2Bcosmetics%26articleFilter%3Drentable%257Cfree%257Crestricted

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not Rated