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632-22-4 - Tetramethylurea, 99% - A16295 - Alfa Aesar

A16295 Tetramethylurea, 99%

CAS-Nummer
632-22-4
Synonyme

Größe Preis ($) Menge Verfügbarkeit
50g 29,56
250g 111,24
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Tetramethylurea, 99%

MDL
MFCD00008319
EINECS
211-173-9

Chemische Eigenschaften

Formel
C5H12N2O
Molmasse
116.16
Schmelzpunkt
-1°
Siedepunkt
176-178°
Flammpunkt
75°(167°F)
Dichte
0.969
Brechungsindex
1.4506
Löslichkeit
Miscible with water.Miscible with water, petroleum ether and common solvents.

Anwendungen

Tetramethylurea is used as a solvent in dyestuff industries, in condensation reaction and intermediates in surfactant. It is utilized for base catalyzed isomerization and alkylation hydrocyanation due to its low permittivity. It reacts with oxalyl chloride to prepare tetramethyl chloroformamidinium chloride, which is used for the conversion of carboxylic acids and dialkyl phosphates to anhydrides and pyrophosphates respectively.

Bemerkungen

Hygroscopic. Keep the container tightly closed in a dry and well-ventilated place. Incompatible with strong oxidizing agents.

Literaturverweise

High-boiling dipolar aprotic solvent. The polar nature, wide liquid range and high solvent power of tetraalkylureas make them suitable solvents for a wide range of reactions; review: Angew. Chem. Int. Ed., 18, 503 (1979).

Reacts with oxalyl chloride to give tetramethyl chloroformamidinium chloride, a useful reagent for the conversion of carboxylic acids and dialkyl phosphates to anhydrides and pyrophosphates respectively: Bull. Chem. Soc. Jpn., 56, 3529 (1983).

Indra, S.; Biswas, R. Hydrogen-bond dynamics of water in presence of an amphiphile, tetramethylurea: signature of confinement-induced effects. Mol. Simul. 2015, 41 (5-6), 471-482.

Krakowiak, J.; Wawer, J. Effect of temperature and ionic strength on volumetric and acoustic properties of solutions of urea alkyl derivatives in aqueous NaCl. J. Chem. Thermodyn. 2015, 90, 232-241.

GHS Gefahren- und Sicherheitshinweise

Gefahrenhinweise (EU): H360-H302-H227-H313

May damage fertility or the unborn child. Harmful if swallowed. Combustible liquid. May be harmful in contact with skin.

Sicherheitshinweise: P210-P201-P280-P281-P301+P312-P312-P308+P313-P405-P403+P235-P501a

Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Obtain special instructions before use. Wear protective gloves/protective clothing/eye protection/face protection. Use personal protective equipment as required. IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell. IF exposed or concerned: Get medical advice/attention. Store locked up. Store in a well-ventilated place. Keep cool. Dispose of contents/container in accordance with local/regional/national/international regulations.

Weitere Referenzen

Merck
14,9230
Beilstein
773898
Harmonized Tariff Code
2924.19
TSCA
Yes
RTECS
YU2625000

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