A suspension of silver particles in water, listed as an antimicrobial ingredient and linked to an Annex II entry.
What it is
Colloidal silver is, according to CosIng, a suspension of silver particles in water, prepared by electrolysis or by reduction of soluble silver salts. CosIng lists it as an antimicrobial and slip-modifying ingredient. The EU data link this ingredient to an entry in Annex II (prohibited substances).
Where it is used
Appears on the ingredient lists of a small number of products.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
See the EU regulation section for what the Annex II entry covers and how it applies. The INCI name does not show the particle size.
Functions
- Antimicrobial
- Preventing and/or slowing down microbial growth.
- Slip modifier
- Enhancing the flow properties of other ingredients without reacting chemically with them.
EU regulation
- As of
- 3 November 2026 · (EU) 2026/78
Scientific opinions (SCCS)
- Scientific Advice on Silver used in cosmetic products (CAS/EC No. 7440-22-4/231-131-3)
- Safety of Silver (CAS/EC No. 7440-22-4/231-131-3) used in cosmetic products
- Colloidal Silver (nano)
Opinions of the EU Scientific Committee on Consumer Safety that mention this ingredient. They assess specific uses and concentrations; read the opinion for its scope.