Benzotrichloride

Structural formula
General
Surname	Benzotrichloride
other names	(Trichloromethyl) benzene; Phenyltrichloromethane; Phenylchloroform; α, α, α-benzotrichloride; α, α, α-trichlorotoluene;
Molecular formula	C 7 H 5 Cl 3
Brief description	colorless, pungent smelling liquid
External identifiers / databases
EC number	202-634-5
ECHA InfoCard	100.002.395
PubChem	7367
Wikidata	Q426111
properties
Molar mass	195.48 g mol −1
Physical state	liquid
density	1.37 g cm −3
Melting point	−4.8 ° C
boiling point	221 ° C
Vapor pressure	0.2 h Pa (20 ° C); 0.49 hPa (30 ° C); 1.33 hPa (40 ° C); 1.8 hPa (50 ° C);
solubility	very bad in water (0.1 g l −1 at 20 ° C)
Refractive index	1.5580 (20 ° C)
safety instructions
H and P phrases	H: 302-330-315-317-318-335-350
	P: 202-280-302 + 352-304 + 340-305 + 351 + 338-310
MAK	Switzerland: 0.012 ml m −3 or 0.1 mg m −3
	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

Benzotrichloride is a chemical compound from the group of aromatic chlorinated hydrocarbons . It is a colorless, pungent smelling liquid.

Extraction and presentation

Benzotrichloride is by chlorination of toluene obtained using, for example dibenzoyl peroxide as a catalyst can be used.

properties

Benzotrichloride is a colorless, pungent smelling liquid, which is very poorly soluble in water. Benzotrichloride vapors are seven times heavier than air.

Safety-related parameters

Benzotrichloride only forms flammable vapor-air mixtures at higher temperatures. The compound has a flash point of 108 ° C. The explosion range is between 2.1 vol.% As the lower explosion limit (LEL) and 6.5 vol.% As the upper explosion limit (UEL). The ignition temperature is 420 ° C. The substance therefore falls into temperature class T2.

use

Benzotrichloride is used exclusively as an intermediate in the production of benzoyl chloride , benzotrifluoride ( raw material for herbicides, dyes, pharmaceuticals), dyes and 2,4-dihydroxybenzophenone .

safety instructions

Benzotrichloride is classified in the TRGS 905 regulation as a carcinogen in category 2.

proof

Benzotrichloride can be determined in air by gas chromatographic determination using a flame ionation detector.

Web links

National Institute of Environmental Health Sciences , 13th Report on Carcinogens (RoC): Benzotrichloride (PDF file; 94 kB)

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o Entry on alpha, alpha, alpha-trichlorotoluene in the GESTIS substance database of the IFA , accessed on January 8, 2018(JavaScript required) .
↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-494.
↑ Entry on α, α, α-trichlorotoluene 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 .
↑ Swiss Accident Insurance Fund (Suva): Limits - Current MAK and BAT values (search for 98-07-7 or benzotrichloride ), accessed on November 2, 2015.

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o Entry on alpha, alpha, alpha-trichlorotoluene in the GESTIS substance database of the IFA , accessed on January 8, 2018(JavaScript required) .

[CRC90_3_494-2] David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-494.

[CLP_100.002.395-3] Entry on α, α, α-trichlorotoluene 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 .

[4] Swiss Accident Insurance Fund (Suva): Limits - Current MAK and BAT values (search for 98-07-7 or benzotrichloride ), accessed on November 2, 2015.