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

Utilizzato in prodotti per la cura della pelle per ritardare l'invecchiamento della pelle, idratante.

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

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

References_______________________________________________________________________

(1) Quinson, J., Kacenauskaite, L., Bucher, J., Simonsen, S. B., Theil Kuhn, L., Oezaslan, M., ... & Arenz, M. (2019). Controlled Synthesis of Surfactant‐Free Water‐Dispersible Colloidal Platinum Nanoparticles by the Co4Cat Process. ChemSusChem, 12(6), 1229-1239.