CAS 7440-57-5 Gold single crystal, 10mm (0.39in) dia, 50mm (2.0in) long, random orientation

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Gold single crystal, 10mm (0.39in) dia, 50mm (2.0in) long, random orientation

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Catalog Number

ACM7440575-88

CAS Number

7440-57-5

Product Name

Gold single crystal, 10mm (0.39in) dia, 50mm (2.0in) long, random orientation

Structure

Category

Metal Gauzes; Electronic Materials

Description

Gold-coloured powder or tiny sheets;Soft yellow metal; gold-colored powder or tiny sheets.

IUPAC Name

gold

Molecular Weight

196.96657g/mol

Molecular Formula

Au;Au

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

Covalently-Bonded Unit Count

Diameter

40 nm

EC Number

231-165-9;231-165-9

Exact Mass

196.96657g/mol

Formal Charge

Heat of Vaporization

324 kJ/mol

Heavy Atom Count

MeSH Entry Terms

Colloid, Gold;Colloidal Gold;Gold Colloid;Gold, Colloidal

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

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

MSDS

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COA

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Spec Sheet

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