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7440-09-7 - Potassium, chunks, in mineral oil, 98% - L13267 - Alfa Aesar

L13267 Potassium, chunks, in mineral oil, 98%

Numéro de CAS
7440-09-7
Synonymes

Conditionnement Prix ($) Quantité Disponibilité
25g 72,30
100g 248,00
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Potassium, chunks, in mineral oil, 98%

MDL
MFCD00133776
EINECS
231-119-8

Propriétés chimiques

Formule
K
Poids moleculaire
39.10
Point de fusion
63-64°
Point d'ébullition
765-770°
Densité
0.860
Sensibilité
Air & Moisture Sensitive
Solubilité
Reacts with water.

Applications

Potassium forms a blue solution in tetrahydrofoliate which is used for the ? -monoalkylation of -lactones in the presence of 18-crown-6. It is used for generation of potassium ethoxide in solution, for use in the Birch reduction of an aromatic ring, for preparation of potassium amide,

Notes

Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Handle and store under inert gas. Incompatible with strong oxidizing agents.

Références bibliographiques

Georgios Sakellariou.; Apostolos Avgeropoulos.; Nikos Hadjichristidis.; Jimmy W. Maysa.; Durairaj Baskarana. Functionalized organic nanoparticles from core-crosslinked poly(4-vinylbenzocyclobutene-b-butadiene) diblock copolymer micelles. Polymer. 2009, 50 (26), 6202-6211.

Colloidal potassium can be obtained by sonication in toluene or xylene under argon at 10 o : Tetrahedron Lett., 25, 753 (1984).

In the presence of 18-crown-6, potassium forms a blue solution in THF, which has been used, e.g. for the ɑ -monoalkylation of -lactones: J. Org. Chem., 52, 4601 (1987); the cleavage of ß -lactones: J. Chem. Soc., Chem. Commun., 1261 (1988); and of aryl ethers and esters: J. Org. Chem., 53, 5230 (1988).

For generation of potassium ethoxide in solution, see: Org. Synth. Coll ., 7, 149 (1990).

For use in the Birch reduction of an aromatic ring, see: Org. Synth. Coll., 9, 698 (1998); reviews of the Birch reduction: Tetrahedron, 45, 1579 (1989); Org. React., 42, 1 (1992).

For preparation of potassium amide, see: Org. Synth. Coll., 8, 173 (1993).

Mentions de danger et de prudence du SGH

Mentions de danger (UE): H260-H314-H318

In contact with water releases flammable gases which may ignite spontaneously. Causes severe skin burns and eye damage. Causes serious eye damage.

Mentions de prudence: P223-P231+P232-P303+P361+P353-P305+P351+P338-P405-P501a

Keep away from any possible contact with water, because of violent reaction and possible flash fire. Handle under inert gas. Protect from moisture. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Autres références

Merck
14,7604
Classe de danger
4.3
Groupe d'emballage
I
Code tarifaire harmonisé
2805.19
TSCA
Yes
RTECS
TS6460000

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