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

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Gold nanopowder

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Catalog Number

ACM7440575-120

CAS Number

7440-57-5

Product Name

Gold nanopowder

Structure

Category

Nanopowders

Description

Resistivity: 2.05 μΩ-cm, 0°C. Gold colloid nanoparticles intercalated within a polymer matrix lower the effective conjugation length of the polymer, resulting in a blue shift in the adsorption

IUPAC Name

gold

Molecular Weight

197

Molecular Formula

Canonical SMILES

[Au]

InChI

1S/Au

InChI Key

PCHJSUWPFVWCPO-UHFFFAOYSA-N

Boiling Point

2808 °C (lit.)

Melting Point

1063 °C (lit.)

Purity

99.9%

Density

19.3 g/mL at 25 °C (lit.)

Solubility

Insoluble in water

Appearance

nanopowder, <100 nm particle size

Color/Form

Brown

Complexity

Covalently-Bonded Unit Count

EC Number

231-165-9;231-165-9

Exact Mass

196.96657g/mol

Form

Powder

Formal Charge

Hazard Statements

H314 H351

Heat of Vaporization

324 kJ/mol

Heavy Atom Count

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

Precautionary Statements

P280 P305+P351+P338 P310

Rotatable Bond Count

Signal Word

Danger

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

Download MSDS

COA

Download COA

Spec Sheet

Download Spec Sheet

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