CAS 7440-57-5 Gold - Materials / Alfa Chemistry

NAVIGATION

Gold

PRICE INQUIRY

Catalog Number

ACM7440575-113

CAS Number

7440-57-5

Product Name

Gold

Structure

Category

Self Assembly and Lithography; Nanoparticles; Substrates and Electrode Materials; Vapor Deposition Precursors

Synonyms

Gold Powder,Gold black,Gold element

Description

insulated wire, 1m, conductor diameter 0.025mm, insulation thickness 0.002mm, PTFE (polytetrafluoroethylene) insulation, 99.99%

IUPAC Name

gold

Molecular Weight

196.97

Molecular Formula

Au;Au

Canonical SMILES

[Au]

InChI

1S/Au

InChI Key

PCHJSUWPFVWCPO-UHFFFAOYSA-N

Boiling Point

2700 deg C;4892°F

Melting Point

1063 °C (lit.)

Density

19.3g/mL

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

Application

Gold based neutron flux monitors may use gold foils. Au foils may be used to form a AuSn/Au joint system for opto-electronic chips. Modified gold foil electrode may be used to study heterogeneous electron transfer properties of biological electron transfer proteins.3 Electrodeposited polycrystalline palladium-nickel alloy on gold foils may be investigated for the enhanced catalytic behavior of the alloy.

Storage

room temp

Assay

99.997% trace metals basis

Color/Form

Purple

Complexity

Concentration

51,000-1,500ppm

Covalently-Bonded Unit Count

Diameter

#REF!

EC Number

231-165-9

Electrical Resistivity

2.05 μΩ-cm, 0°C

Exact Mass

196.96657g/mol

Form

wire

Formal Charge

Heat of Vaporization

324 kJ/mol

Heavy Atom Count

Length

0.5 m

MDL Number

MFCD00003436

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

Packaging

1.5 g in rigid mailer

7±0.5

Rotatable Bond Count

Solvent

Water (As Per Requirement)

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.

Thickness

0.009 mm

UNII

79Y1949PYO

Vapor Density

19.3

MSDS

Download MSDS

COA

Download COA

Spec Sheet

Download Spec Sheet