TORSKAL offers 2 ranges of Gold Nanoparticles

  • Green gold nanoparticles – Synthesized using green chemistry (patented method!)

  • Standard / Turkevich gold nanoparticles

What are green synthesized gold nanoparticles?

The green gold nanoparticles are produced by green chemistry (by bio-reduction of metal salts HAuCl4), with crude and / or purified extracts from plants. These extracts have the double action of reducing the metal and stabilizing the nanoparticle formed. The size and shape of the gold nanoparticles formed can be modulated by various factors during the synthesis. The synthesis of nanoparticles by using the bio-reducing potential of plant extracts has been demonstrated in various studies in recent years. Based on this observation, TORSKAL developed a green chemistry approach to synthesize nanoparticles using endemic plants originated from Reunion Island. Plants extracts have the double action of reducing the metal and stabilizing the formed nanoparticles.

The obtained colloidal gold or gold colloidal suspension are fully characterized by transmission electron microscopy (TEM), dynamic light scattering (DLS), zeta-potential, XRD, UV-Vis, FTIR and Raman spectroscopy to understand their physicochemical and biological properties.

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TORSKAL's Gold Nanoparticles synthesized from green chemistry, lyophilised plant extract, plant powder and dried plant leaves

TORSKAL’s green gold nanoparticles, lyophilised plant extract, plant powder and dried plant leaves

The unique properties of TORSKAL’s green gold nanoparticles:


We employ an environmentally friendly technique for the production of well-characterized gold nanoparticles.

Salt resistance

Stable over 0.4 M NaCl, which is 5 times higher than gold nanoparticles synthesized by the citrate reducing method.


Our process of producing gold nanoparticles or colloidal gold is very straightforward to scale up with a lower risk of contamination.


Our green synthesis process does not require toxic chemicals, which makes our products suitable for biomedical applications.

High purity

Our gold nanoparticles are of high purity with the absence of aggregation, which makes them monodisperse gold nanoparticles.

High stability – For at least 3 months

Our gold nanoparticles are more stable than Turkevich gold nanoparticles in a saline environment, over time, and after centrifugation.

Other details

Customization of nanoparticles

We also customize the nanoparticles as per your requirement. For any customization including coating, size, shape, etc. please submit your request here.

For bulk orders

To order in bulk quantities and/or to choose your desired concentration (OD: Optical Density) of our products, please submit your request here.

Safety Data Sheet (SDS)

See our Safety Data Sheet (SDS) for the physical & chemical properties of products. For any queries related to our products, please write to us at

#Tags: Gold colloid, Colloidal gold, Colloidal suspension, Nano gold particles, Nanogold particles, Nano gold liquid, Gold particles, Colloidal gold water, Colloidal gold solution, AuNPs, Au nanoparticles.