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

L13267 Potassium, chunks, in mineral oil, 98%

Codice CAS
7440-09-7
Sinonimi

Dimensioni Prezzo ($) Quantità Disponibilità
25g 72,30
100g 248,00
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Potassium, chunks, in mineral oil, 98%

MDL
MFCD00133776
EINECS
231-119-8

Proprietà chimiche

Formula
K
Peso formula
39.10
Punto di fusione
63-64°
Punto di ebollizione
765-770°
Densità
0.860
Sensibilità
Air & Moisture Sensitive
Solubilità
Reacts with water.

Applicazioni

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,

Note

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.

Letteratura

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).

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (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.

Dichiarazioni precauzionali: P231+P232-P260-P280-P303+P361+P353-P305+P351+P338-P301+P330+P331-P304+P340-P310-P405-P501a

Handle under inert gas. Protect from moisture. Do not breathe dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. 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. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Immediately call a POISON CENTER or doctor/physician. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Altri riferimenti

Merck
14,7604
Classe di rischio
4.3
Gruppo di imballaggio
I
Codice tariffe armonizzato
2805.19
TSCA
Yes
RTECS
TS6460000

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