Structure

Au Nanoparticles(D: 180 nm )

CAS
7440-57-5
Catalog Number
ACM7440575-80
Category
Metal Nano-materials
Molecular Weight
196.96657g/mol
Molecular Formula
Au;Au

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Specification

Description
Gold-coloured powder or tiny sheets;Soft yellow metal; gold-colored powder or tiny sheets.
IUPAC Name
gold
Canonical SMILES
[Au]
InChI
InChI=1S/Au
InChI Key
PCHJSUWPFVWCPO-UHFFFAOYSA-N
Boiling Point
2700 deg C;4892°F
Melting Point
1064.76 deg C;1948.57°F
Density
19.3
Solubility
INSOL IN WATER, ACID; SOL IN POTASSIUM CYANIDE, HOT SULFURIC ACID;Soluble in aqua regia, insoluble in acids;Dissolves readily in 3:1 hydrochloric-nitric acid to form HAuCl4; dissolves in cyanide solutions in the presence of air or hydrogen peroxide to form Au(CN)2
Color/Form
Soft, yellow metal;Cubic, yellow, ductile, metallic crystals; forms red, blue, or violet colloidal suspensions.;Yellow, ductile metal, relatively soft;Yellow, soft metal, face-centered cubic structure;Malleable, lustrous, yellow metal;When prepared by volatilization or precipitation methods, deep violet, purple, or ruby powder
Complexity
0
Covalently-Bonded Unit Count
1
Diameter
180 nm
EC Number
231-165-9;231-165-9
Exact Mass
196.96657g/mol
Formal Charge
0
H-Bond Acceptor
0
H-Bond Donor
0
Heat of Vaporization
324 kJ/mol
Heavy Atom Count
1
Monoisotopic Mass
196.96657g/mol
Odor
No odor
Other Experimental
/Gold/ reacts with aqua regia, with mixture containing chlorides, bromides, or iodides if they can generate nascent halogens, with many oxidizing mixture especially those containing halogens. Also with alkali cyanides, solution of thiocyanates and double cyanides.;VP: 1 Pa @ 1373 °C; 10 Pa @ 1541 °C; 100 Pa at 1748 °C; 1 kPa @ 2008 °C; 10 kPa @ 2347 °C; 100 kPa @ 2805 °C;Hardness (Mohs') 2.5-3.0; (Brinell's) 18.5; one natural isotope: 197; artificial isotopes (mass number): 177-179, 181, 183, 185-196, 198-203; Atomic number 79; Valences 1 and 3;Extremely inactive; not attacked by acids or oxygen; superficially attacked by aqueous halogens at room temperature; Reacts with aqua regia, with mixtures containing chlorides, bromides, and iodides, if they can generate nascent halogens, with many oxidizing mixtures, especially those containing halogens, also with alkali cyanides, solutions of thiocyanates and double cyanides.;Excellent reflector of infrared and heat; electrical resistivity: 2.06 microohm-cm @ 0 °C; extremely high light reflectivity;Standard enthalpy of formation: 366.1 kJ/mol (gas);Enthalpy of fusion: 12.55 kJ/mol;Does not corrode in air, but is tarnished by sulfur; chemically non-reactive; attacked by chlorine and cyanide solutions in the presence of oxygen.;GOOD CONDUCTOR OF HEAT AND ELECTRICITY;Very stable and nonreactive, does not burn or oxidize in air; reacts with various oxidizing agents at ambient temperatures provided a good ligand in present to lower the redox potential below that of water; not attacked by most acids under ordinary conditions; stable in basic media; reacts with halogens, particularly in the presence of moisture, and at low (<200 °C) temperatures.;IT FORMS ALLOYS WITH A NUMBER OF METALS INCLUDING SILVER, COPPER, PLATINUM, PALLADIUM, MANGANESE, ZINC & MAGNESIUM
Rotatable Bond Count
0
Stability
Extremely inactive; not attacked by acids, air or oxygen. Superficially attacked by aq halogens at room temp.;Does not corrode in air, but is tarnished by sulfur;...Stable in basic media.
UNII
79Y1949PYO
Vapor Density
19.3
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