Tetradifon

Structural formula
General
Surname	Tetradifon
other names	2,4,4 ', 5-tetrachlorodiphenyl sulfone
Molecular formula	C 12 H 6 Cl 4 O 2 S
Brief description	white odorless solid
External identifiers / databases
CAS number 116-29-0 EC number 204-134-2 ECHA InfoCard 100.003.759 PubChem 8305 Wikidata Q413684
properties
Molar mass	356.06 g mol −1
Physical state	firmly
density	1.515 g cm −3
Melting point	146 ° C
Vapor pressure	0.043 hPa (20 ° C)
solubility	practically insoluble in water soluble in chloroform and xylene
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 302-410 P: 273-501
Toxicological data	566 mg kg −1 ( LD 50 ,  rat ,  oral ) 10,000 mg kg −1 ( LD 50 ,  rabbit ,  transdermal )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tetradifon is an active ingredient for plant protection and a chemical compound from the group of diphenyls and sulfones .

Extraction and presentation

Tetradifon can be obtained by reacting 1,2,4-trichlorobenzene with chlorosulfonic acid and then with chlorobenzene or by reacting Tetrasul with hydrogen peroxide .

properties

Tetradifon is a white, odorless, flammable, non-volatile solid. It is stable to hydrolysis in alkaline and acidic solutions. The technical product consists of more than 94% tetradifon with impurities of 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) and polychlorinated dibenzodioxins, but not 2,3,7,8-TCDD .

use

Tetradifon is used as an acaricide . It is toxic to mite eggs and non-adult mites. The effect is based on the inhibition of oxidative phosphorylation . It is used in horticulture, including in hobby greenhouses, especially for fruit, vegetables, ornamental plants, hops, cotton and sugar cane, and in forestry.

Admission

The connection was approved between 1971 and 1985 in the FRG and until 1992 in the GDR.

Tetradifon is not on the list of active ingredients for pesticides permitted in the European Union. In Germany, Austria and Switzerland, no pesticides with this active ingredient are permitted.

Individual evidence

1. ↑ ^{a b c d e f g h i} Entry for CAS no. 116-29-0 in the GESTIS substance database of the IFA , accessed on August 22, 2012(JavaScript required) .
2. ↑ Tetradifon data sheet , PESTANAL at Sigma-Aldrich , accessed on August 22, 2012 ( PDF ).
3. ↑ ^{a b c} Entry on Tetradifon in the Pesticide Properties DataBase (PPDB) of the University of Hertfordshire , accessed on July 31, 2013.
4. ↑ Thomas A. Unger: Pesticide Synthesis Handbook . William Andrew, 1996, ISBN 0-8155-1853-6 , pp. 831 ( limited preview in Google Book search).
5. ↑ Health and Safety Guide (HSG) for Tetradifon , accessed on December 1, 2014.
6. ↑ Peter Brandt: Active Ingredients in Plant Protection Products ; Approval history and regulations of the Plant Protection Application Ordinance . Springer, Berlin 2010, ISBN 978-3-0348-0028-0 , pp. 26 ( limited preview in Google Book search).
7. ↑ Regulation (EC) No. 2076/2002 (PDF) of the Commission of November 20, 2002.
8. ↑ General Directorate Health and Food Safety of the European Commission: Entry on Tetradifon in the EU pesticide database; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; Retrieved February 25, 2016.