Benzyldimethylamine

Structural formula
General
Surname	Benzyldimethylamine
other names	N -benzyldimethylamine N , N -dimethylbenzylamine BDMA
Molecular formula	C 9 H 13 N
Brief description	flammable, colorless liquid with an amine-like odor
External identifiers / databases
CAS number 103-83-3 EC number 203-149-1 ECHA InfoCard 100.002.863 PubChem 7681 Wikidata Q424966
properties
Molar mass	135.21 g mol −1
Physical state	liquid
density	0.90 g cm −3 (20 ° C)
Melting point	−75 ° C
boiling point	181 ° C
Vapor pressure	2.4 mbar (20 ° C)
solubility	heavy in water (1.2 g l −1 at 27 ° C) soluble in acetone, benzene, methanol, ethanol and ether
Refractive index	1.501 (20 ° C)
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 226-302-312-331-314-412 P: 210-271-273-280-305 + 351 + 338-403 + 233-501
Toxicological data	265 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Benzyldimethylamine is a chemical compound from the group of amino compounds .

Extraction and presentation

Benzyldimethylamine can be obtained by reacting benzylamine with methanol in the presence of hydrogen chloride as a catalyst .

It is also possible to prepare it by reacting benzyl chloride with dimethylamine .

properties

Benzyldimethylamine is a flammable, less volatile, colorless liquid with a foul-smelling amine-like odor, which is sparingly soluble in water. Its aqueous solution has an alkaline reaction. It has a viscosity of 3 mPa · s at 20 ° C.

use

Benzyldimethylamine is used in the manufacture of polyurethane paints, coatings, foams and potting compounds and as an intermediate in organic syntheses. It is also used in electron microscopy as a so-called Maraglass catalyst.

safety instructions

The vapors of benzyldimethylamine can form an explosive mixture with air ( flash point 55 ° C, ignition temperature 410 ° C).

Individual evidence

1. ↑ ^{a b c d e f g h i j k} Entry on benzyldimethylamine in the GESTIS substance database of the IFA , accessed on January 8, 2020(JavaScript required) .
2. ↑ ^{a b} Data sheet N , N -Benzyldimethylamine (PDF; 223 kB) from GisChem, accessed on August 13, 2012.
3. ↑ Data sheet N, N-Dimethylbenzylamine from Sigma-Aldrich , accessed on September 30, 2010 ( PDF ).
4. ↑ Entry on Benzyldimethylamine in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
5. ↑ Dilip K. Nandi, Sunanda K. Palit, Dibakar C. Deka: Acid catalyzed pressure synthesis of N, N-dimethylbenzylamine from benzylamine and methanol. In: Journal of Chemical Technology & Biotechnology. 38, 1987, p. 243, doi : 10.1002 / jctb.280380404 .
6. ↑ Data sheet N, N-Dimethylbenzylamine (PDF) from Merck , accessed on September 30, 2010.
7. ↑ Konrad Uhlig: Polyurethane Pocket Book , Carl Hanser Verlag Munich, Vienna, 1998, p. 130, ISBN 3-446-18913-0 .