Colloidal platinum is a chemical compound formed by the reaction of platinum in aqueous solution with citrate reduction of chloroplatinic acid or hexachloroplatinic acid. Colloidal means that platinum is dispersed in another substance called a dispersant to form a mixture. In this case, these are platinum nanoparticles with a purity of about 1000ppm dispersed in a liquid and synthesised by chemical reduction of metal salts. An example of colloidal platinum are colloidal systems prepared using polyvinyl alcohol citrate or polyvinyl pyrrolidone as stabiliser.
A recent synthesis system to obtain water-dispersible colloidal platinum nanoparticles without surfactants is the Co4Cat process, which introduces substantial economic and ecological benefits as a metal precursor is used that is dissolved in an alkaline solution (1).
It takes the form of a dark brown or black liquid, tasteless, non-toxic, stable.
What it is used for and where
Food
Colloidal platinum è un antiossidante ad alte prestazioni, utilizzato nella conservazione degli alimenti.
Cosmetics
Used in skin care products to help delay skin ageing and provide moisturising benefits.
For more information: Colloidal platinum studies
Typical commercial product characteristics Platinum
| Appearance | Whitish-gray metal |
| Boiling Point | 3827°C |
| Melting Point | 1772°C |
| Flash Point | 3825°C |
| Density | 1.060 g/mL at 20°C |
| Refraction Index | n20/D 1.347 |
| Safety |  |
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Platinum
- Molecular Formula Pt
- Molecular Weight 195.08
- Exact Mass 194.964798
- CAS 7440-06-4
- UNII 49DFR088MY
- EC Number 231-116-1
- DSSTox Substance ID DTXSID9064681
- IUPAC platinum
- InChI=1S/Pt
- InChl Key BASFCYQUMIYNBI-UHFFFAOYSA-N
- SMILES [Pt]
- MDL number MFCD00011179
- PubChem Substance ID 24856206
- ChEBI 33364 33398 33400
- ICSC 1393
- NACRES NA.23
- RTECS TP2160000
- UN 3089
- NCI C756
Synonyms
- Platinum gray
- Platinum element
