High Purity Nano Colloidal Gold CAS 7440-57-5 Gold Colloidal Nanoparticle

Overview of Nano gold colony

Nanogold is high-purity gold as raw material through a unique new processing technology to make gold particle size of 15nm or less, significantly improving the inherent characteristics of gold, such as catalytic effect, free radical removal effect, dispersion effect and so on. Gold, namely Gold, chemical element symbol Au, its high security, high stability, oxidation resistance, corrosion resistance and other characteristics. Gold is one of the rarest and most precious metals. It has a face-centered cube structure and an atomic weight of 196.96654. Melting point: 1064.43℃, boiling point: 2808℃, electronegativity: 2.54, covalent radius: 1.34A, ion radius: 0.85 (+3) A, atomic radius: 1.46A, atomic volume: 10.2cc/mol. Gold can form alloys with many metals because the nuclear radii of these metals are very close to the atomic radii of gold. The atomic radius of gold is 1.46 angstroms;1.46 Mr. Bi;1.44 Mr. Silver; Platinum 1.39 Mr.Thus, gold can be formed in alloys of gold and silver, gold and copper, gold and platinum, etc. These alloys are not compounds but solid melts. TRUNNANO is a trusted global Nano gold colloid supplier. Feel free to send an inquiry about the latest price of the Nanogold colloid at any time.

Features of  Nano gold colony

Colloidal gold is prepared by dispersing 15nm or even smaller gold nanoparticles into the water solution. The preparation will end up with a uniform neutral solution with a stable color. The nano gold solution appears to be faint red, not golden brown. The gold liquid seems to be azure when in the condensed state by adding other substances. The solution is edible for human beings and totally safe for skin contact.

Colloidal Gold Properties
Other Names	gold colloid solution, gold nanodispersion, gold nanoparticle dispersion
CAS No.	7440-57-5
Compound Formula	Au
Molecular Weight	196.97
Appearance	Purple Liquid
Melting Point	1064.43℃
Boiling Point	3080℃
Density	19.3 g/cm3
Solubility in H2O	N/A
Electrical Resistivity	2.214 microhm-cm @ 20 °C
Poisson’s Ratio	0.44
Tensile Strength	N/A
Thermal Conductivity	3.18 W/cm/K @ 298.2 K
Thermal Expansion	(25 °C) 14.2 µm·m-1·K-1
Vickers Hardness	216 MPa
Young’s Modulus	79 GPa
Colloidal Gold Health & Safety Information
Signal Word	N/A
Hazard Statements	N/A
Hazard Codes	N/A
Risk Codes	N/A
Safety Statements	N/A
Transport Information	NONH

Technical Parameter of Nano gold colony

Product Name	MF	Purity	Particle Size	Bulk Density	Melting Point	Color
Colloidal Gold	Au	1000ppm	5-15nm	1.01 g/cm3	1064℃	Purple

Applications of Nano gold colony

1. In immunoassays and biosensors, gold nanoparticles’ security and solid adsorption capability for healthy proteins and DNA make them perfect service providers. They can successfully adsorb and paralyze biomolecules without modifying their residential or commercial properties. This particular offers gold nanoparticles substantial benefits in high-sensitivity evaluation, such as DNA acknowledgment and genetics discovery.
2. Due to their excellent physical and chemical properties, gold nanorods are widely used as colorants in food, glass, and living organisms. They provide products with bright colors and do not affect the properties of the colored substance.
3. Gold nanoparticles additionally show their distinct application worth in ecological filtration. As an effective adsorbent, they can adsorb and get rid of dangerous compounds from water, aiding in improving ecological filtration items.
4. Gold nanoparticles are used as an effective chemical. They can be integrated right into cosmetics to improve item durability with their anti-bacterial residential or commercial properties. In addition, customers value the bleaching, anti-aging, and hydrating advantages that gold nanoparticles use.
5. Gold nanoparticles’ anti-bacterial and anti-inflammatory buildings make them optimal ingredients in clinical gadgets and wellness items. They can boost the anti-bacterial impact of the item and assistance protect against and deal with different swellings. In addition, gold nanoparticles are also used to produce beauty care equipment, such as facial masks and toothbrushes, to provide people with a healthier and more comfortable lifestyle.

 How is Nano gold colloid Produced?

The steps of preparation of gold nanoparticles are as follows :1) adding gold chloric acid in deionized water, and adding polyvinylpyrrolidone, sodium dodecyl sulfate, gold chloric acid, polyvinylpyrrolidone and sodium dodecyl sulfate at mass concentrations of 0.01 ~ 1.0%,0.02 ~ 2.0% and 0.0001 ~ 1.0%, respectively;2) At room temperature, add 0.01 ~ 0.5% hydrazine hydrate aqueous solution to the mixed solution of Step 1) in stirring. When the pH value reaches 6.8 ~ 7.0, stop adding hydrazine hydrate aqueous solution and continue stirring for 20 ~ 30 minutes to get a gold nanoscale solution. The advantages of this preparation method are as follows: the preparation is carried out at room temperature, the process is simple, the particle size of the gold nanoparticles in the solution is 10-100nm, the gold particles are small, and it is not easy to precipitate.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and nanomaterials, including boride powder, nitride powder, graphite powder, sulfide powder, 3D printing powder, etc.The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.If you are interested, please feel free to contact us or click on the needed products to send an inquiry. 

Storage Condition of Nano gold colloid:

1. Colloidal gold should be prevented from sunlight.

1. The product is for research and development purpose and the user must be a professional person ( This person must know how to use this product. )

2. Nanoparticle solutions are suspensions of nanoparticles in water. These dispersions can be used as-is or diluted with suitable (compatible) solvents. Nanoparticles in dispersions can sometimes settle upon storage, in which case they can be mixed (shook up) before use.

 Payment Term

L/C, T/T, Western Union, Paypal, Credit Card etc.

 Shipment Term

By sea, by air, by express, as customers request.

 

5 FAQs of Nano gold colony

Q1

What are gold colloids used for?

Answer: Colloidal gold particles have been used extensively for biological labeling and electron microscopy with both SEM and TEM (Roth, 1996). It would seem that colloidal gold particles might be useful for correlative fluorescence and electron microscopy if a fluorophore was added to the colloidal gold.

 

Q2

What does colloidal gold do for skin?

Answer: Known for its antioxidant and anti-inflammatory properties, studies showed that colloidal gold can penetrate deeper into the skin and acts as a carrier for other active ingredients.

 

Q3

How is colloidal gold obtained?

Answer: One of the most important methods is the use of reducing agents such as sodium citrate. This method was first proposed in 1951 by Turkevich for the preparation of monodisperse colloidal gold solutions. This method makes it possible to obtain spherical nanoparticles with a size of 5–40 nm.

Q4

Is colloidal gold the same as nano gold?

Answer: Colloidal gold is a suspension consisting of sub-micron gold nanoparticles (AuNPs) suspended within a solvent, most often water. AuNPs have unique optical, electronic, and thermal properties and are being incorporated in a wide variety of technologies including microscopy, electronics, diagnostics, and therapeutics.