Azoxybenzene

Structural formula
General
Surname	Azoxybenzene
other names	Azoxybenzene; Azoxydibenzene; Diphenyldiazine-1-oxide; Fenazox; Fentoxan;
Molecular formula	C 12 H 10 N 2 O
Brief description	orange solid
External identifiers / databases
EC number	207-802-1
ECHA InfoCard	100.007.094
PubChem	10316
Wikidata	Q5715108
properties
Molar mass	198.22 g mol −1
Physical state	firmly
density	1.16 g cm −3 (20 ° C)
Melting point	36 ° C (trans-azoxybenzene); 87 ° C (cis-azoxybenzene);
boiling point	Decomposes to nitrous gases
solubility	practically insoluble in water
safety instructions
GHS hazard labeling from Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary Caution
H and P phrases	H: 302-312-332
	P: 302 + 352
Toxicological data	620 mg kg −1 ( LD 50 , rat , oral ) ; 1350 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 .

Azoxybenzene is a chemical compound belonging to the azobenzenes group . The flammable, water-insoluble solid has been produced by Fahlberg-List since 1974 . It was approved as an active ingredient against varroa mites in the GDR until 1992 under the trade name Falivaron .

Extraction and presentation

Azoxybenzene can be produced by reacting nitrobenzene with an oxidizing agent (e.g. arsenic (III) oxide ) and caustic soda . Alternatively, N- phenylhydroxylamine can also be oxidized.

properties

The heat of decomposition determined by DSC is −258 kJ · mol ⁻¹ or −1303 kJ · kg ⁻¹ .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Entry on azoxybenzene in the GESTIS substance database of the IFA , accessed on February 7, 2017(JavaScript required) .
↑ Entry on Azoxybenzene in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on August 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
↑ Thomas A. Unger: Pesticide Synthesis Handbook . William Andrew, 1996, ISBN 0-8155-1853-6 , pp. 998 ( limited preview in Google Book search).
↑ Grewer, T .; Klais, O .: Exothermic decomposition - investigations of the characteristic material properties , VDI-Verlag, series "Humanisierung des Arbeitsleben", Volume 84, Düsseldorf 1988, ISBN 3-18-400855-X , p. 9.

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Entry on azoxybenzene in the GESTIS substance database of the IFA , accessed on February 7, 2017(JavaScript required) .

[CLP_100.007.094-2] Entry on Azoxybenzene in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on August 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .

[unger-3] Thomas A. Unger: Pesticide Synthesis Handbook . William Andrew, 1996, ISBN 0-8155-1853-6 , pp. 998 ( limited preview in Google Book search).

[Grewer-4] Grewer, T .; Klais, O .: Exothermic decomposition - investigations of the characteristic material properties , VDI-Verlag, series "Humanisierung des Arbeitsleben", Volume 84, Düsseldorf 1988, ISBN 3-18-400855-X , p. 9.