Autorizzo l’utilizzo di cookies.

Accetto Utilizziamo cookies per migliorare il nostro servizio e realizzare statistiche. Questa funzione puó essere disattivata cambiando la configurazione del browser. Continuando a navigare senza modificare questi parametri, consideriamo che l’uso di cookies sia accettato

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

A16295 Tetramethylurea, 99%

Codice CAS
632-22-4
Sinonimi

Dimensioni Prezzo ($) Quantità Disponibilità
50g 29,70
250g 112,00
Aggiungi al carrello Aggiungi al preventivo generale Visualizza articolo

Tetramethylurea, 99%

MDL
MFCD00008319
EINECS
211-173-9

Proprietà chimiche

Formula
C5H12N2O
Peso formula
116.16
Punto di fusione
-1°
Punto di ebollizione
176-178°
Punto di infiammabilità
75°(167°F)
Densità
0.969
Indice di rifrazione
1.4506
Solubilità
Miscible with water.Miscible with water, petroleum ether and common solvents.

Applicazioni

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.

Note

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

Letteratura

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.

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (UE): H227-H302-H313-H360

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

Dichiarazioni precauzionali: P210u-P201-P280-P301+P312a-P405-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. IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Altri riferimenti

Merck
14,9230
Beilstein
773898
Codice tariffe armonizzato
2924.19
TSCA
Yes
RTECS
YU2625000

Raccomandato

  • A11156

    Trichloroacetic acid, 99%
  • A18012

    Oxalyl chloride, 98%
  • L09968

    1,3-Dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone, 98%
  • 39651

    Tungstosilicic acid hydrate, Reagent Grade
  • 40001

    Triethyl phosphate, 99+%

Visualizzati di recente

Prodotti chimici

Scienze della vita

Metalli e materiali

Catalizzatori

Apparecchiature di analisi e di laboratorio