How we scored it
Elemental silver (Ag) is a mined mineral element suspended in water (1.0); electrodes and reducing agents leave no mass. 107.9 / 107.9 = 1.0.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.
Where it comes from
Silver metal recovered from ores is either electrolysed into water or reduced from a soluble silver salt to form nanoparticles. In both routes every atom in the particle is mineral-origin silver.
In plain English
Tiny particles of metallic silver suspended in water, listed for antimicrobial and slip-modifying roles. The silver is a mined metal, turned into a suspension by electrolysis or by reducing silver salts.
CosIng definition: Colloidal Silver is a suspension of silver particles in water prepared by electrolysis or by reduction of soluble silver salts.
Structure
silver
References
- 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
- 2Colloidal Silver. PubChem CID 23954. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3COLLOIDAL SILVER. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4COLLOIDAL SILVER. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=COLLOIDAL%20SILVER