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244864

Sigma-Aldrich

Potassium

chunks (in mineral oil), 98% trace metals basis

Synonym(s):

Atomic potassium, Potassium hyperkalemia

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About This Item

Empirical Formula (Hill Notation):
K
CAS Number:
7440-09-7
Molecular Weight:
39.10
MDL number:
MFCD00133776
UNSPSC Code:
12352300
PubChem Substance ID:
24854713
NACRES:
NA.22

vapor pressure

0.09 mmHg ( 260 °C)

Assay

98% trace metals basis

form

chunks (in mineral oil)

reaction suitability

reagent type: reductant

resistivity

6.1 μΩ-cm, 20°C

bp

760 °C (lit.)

mp

64 °C (lit.)

density

0.86 g/mL at 25 °C (lit.)

SMILES string

[K]

InChI

1S/K

InChI key

ZLMJMSJWJFRBEC-UHFFFAOYSA-N

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Application

Combines under pressure with silver metal to form 2 new compounds: K2Ag and K3Ag.†
Potassium can be used in the synthesis of potassium containing solid-state chalcogenides with promising thermoelectric properties. It may also be used in the dehalogenation of 1,3-di-tert-butyl-2,2-dichloro-1,3-diaza-2-sila-4-cyclopentene to form 1,3-di-tert-butyl-2,3-dihydro-1H-1,3,2-diazasilol-2-ylidene.

Pictograms

FlameCorrosion
GHS02,GHS05

Signal Word

Danger

Hazard Statements

H260,H314

Hazard Classifications

Eye Dam. 1 - Skin Corr. 1B - Water-react 1

Supplementary Hazards

EUH014

Storage Class Code

4.3 - Hazardous materials which set free flammable gases upon contact with water

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Incorporation of A2Q into HgQ and dimensional reduction to A2Hg3Q4 and A2Hg6Q7 (A= K, Rb, Cs; Q= S, Se). Access of Li ions in A2Hg6Q7 through topotactic ion-exchange.
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