Michler's ketone

Structural formula
General
Surname	Michler's ketone
other names	4,4'-bis (dimethylamino) benzophenone N , N , N ', N ' -Tetramethyl-4,4'-diaminobenzophenone
Molecular formula	C 17 H 20 N 2 O
Brief description	colorless platelets
External identifiers / databases
CAS number 90-94-8 EC number 202-027-5 ECHA InfoCard 100.001.843 PubChem 7031 ChemSpider 6764 Wikidata Q418109
properties
Molar mass	268.36 g mol −1
Physical state	firmly
Melting point	172-175 ° C
solubility	very heavy in water (0.4 g l −1 at 20 ° C)
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 350-341-318 P: 201-280-305 + 351 + 338-308 + 313
Authorization procedure under REACH	particularly worrying : carcinogenic ( CMR )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Michler's ketone is an almost white solid in its pure state, but mostly a blue-gray solid in technical quality . It is named after its discoverer, the German chemist Wilhelm Michler (1846–1889).

Extraction and presentation

4,4'-bis (dimethylamino) benzophenone can be industrially obtained by reacting N , N -dimethylaniline with phosgene with Lewis catalysis by z. B. ZnCl ₂ produce.

use

In the chemical industry, the compound is primarily used as a starting material for the synthesis of dyes such as B. Crystal Violet .

safety instructions

Michler's ketone is considered carcinogenic .

Individual evidence

1. ↑ ^{a b c d e} Entry on Michler's ketone in the GESTIS substance database of the IFA , accessed on February 18, 2017(JavaScript required) .
2. ↑ Entry on 4,4′-bis (dimethylamino) benzophenone 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 .
3. ↑ Entry in the SVHC list of the European Chemicals Agency , accessed on July 15, 2014.