Consentement d'utilisation des Cookies

J'accepte. Notre site sauvegarde des traceurs textes (cookies) sur votre appareil afin de vous garantir de meilleurs contenus et à des fins de collectes statistiques.Vous pouvez désactiver l'usage des cookies en changeant les paramètres de votre navigateur. En poursuivant votre navigation sur notre site sans changer vos paramètres de navigateur vous nous accordez la permission de conserver des informations sur votre appareil.

74-95-3 - Dibromomethane, 99%, stab. with 50ppm BHT - Methylene bromide - A10456 - Alfa Aesar

A10456 Dibromomethane, 99%, stab. with 50ppm BHT

Numéro de CAS
Methylene bromide

Conditionnement Prix ($) Quantité Disponibilité
100g 15,00
500g 26,10
2500g 96,10
Ajouter au panier Ajouter au devis en vrac Afficher l'article

Dibromomethane, 99%, stab. with 50ppm BHT


Propriétés chimiques

Poids moleculaire
Point de fusion
Point d'ébullition
Indice de réfraction
Miscible with water, chloroform, acetone, ether and alcohol.


Dibromomethane is used as solvent in organic synthesis. It acts as an intermediate in the manufacture of specialty chemicals, agrochemicals and pharmaceuticals. It is useful as extractant and utilized for the determination of 5-nitroimidazoles (5-NDZ) in environmental waters. It is involved in the convertion of catechols to their methylenedioxy derivatives.


Store in cool place. Incompatible with strong oxidizing agents, aluminum and magnesium.

Références bibliographiques

For in situ formation of dibromomethyllithium by reaction with lithiated 2,2,6,6-Tetramethyl­piperidine, A18712, and use in a one-pot ester homologation sequence, safer and more convenient than the classical Arndt-Eistert (diazomethane) method, see: Org. Synth. Coll., 9, 426 (1998):

Reaction with NaHMDS generates monobromocarbene, which reacts with alkenes to give bromocyclopropanes: Synthesis, 201 (1972). It can also be generated by reaction with diethylzinc in the presence of O2: J. Chem. Soc., Chem. Commun., 364 (1975).

The Simmons-Smith reaction (see Diiodomethane, A15457) may be extended to the use of dibromomethane in the cyclopropanation of simple electron-deficient alkenes, using a reducing agent prepared from NiBr2, NaI and Zn: Bull. Chem. Soc. Jpn., 56, 1025 (1983); or with CuCl/Zn: J. Org. Chem., 55, 2491 (1990).

With TiCl4/Zn, methylenation of ketones occurs, as a useful mild alternative to the Wittig reaction: Tetrahedron Lett., 23, 4293 (1982); Org. Synth. Coll., 8, 386 (1993). For a variant using Zn, CuCl and catalytic TiCl4, see: J. Org. Chem., 54, 2388 (1989).

With alcohols, formaldehyde acetals can be formed under phase-transfer conditions: Bull. Chem. Soc. Jpn., 66, 2149 (1993). Diols give methylenedioxy derivatives, which are components of many biologically-important molecules. For use of KF in DMF as base in the methylenation of catechols, see: Tetrahedron Lett., 3361 (1976). KOH in DMSO has been recommended for the methylenation of base-stable carbohydrate diols: Synthesis, 421 (1982). For the methylenation of ribonucleosides under phase-transfer conditions, see: Synthesis, 715 (1981).

Chorazewski, M.; Troncoso, J.; Jacquemin, J. Thermodynamic Properties of Dichloromethane, Bromochloromethane, and Dibromomethane under Elevated Pressure: Experimental Results and SAFT-VR Mie Predictions. Ind. Eng. Chem. Res. 2015, 54 (2), 720-730.

Stoeckel, D.; Wallacher, D.; Zickler, G. A.; Thommes, M.; Smarsly, B. M. Elucidating the Sorption Mechanism of Dibromomethane in Disordered Mesoporous Silica Adsorbents. Langmuir 2015, 31 (23), 6332-6342.

Mentions de danger et de prudence du SGH

Mentions de danger (UE): H332

Harmful if inhaled.

Mentions de prudence: P261-P271-P304+P340-P312a

Avoid breathing dust/fume/gas/mist/vapours/spray. Use only outdoors or in a well-ventilated area. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing.

Autres références

Classe de danger
Groupe d'emballage
Code tarifaire harmonisé


  • A10807

    1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, 98+%
  • A12575

    1-Methylimidazole, 99%
  • A12766

    1,2-Dibromoethane, 99%
  • A13651

    Chlorotrimethylsilane, 98+%
  • A15457

    Diiodomethane, 99%, stab.

Consulté récemment

Produits chimiques

Sciences de la vie

Métaux et matériaux


Analytique et matériel de laboratoire