azoxybenzene (Ref: HSDB 2861) ** fenazox ** azoxybenzide ** azobenzene ** HSDB 2861 ** Translations

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GENERAL INFORMATION
for azoxybenzene

Description: Obsolete substance once used to control aphids and other insect pests

Example pests controlled: Aphids; Citrus red mite; Fruit tree red spidermite; Gall mite; Two-spotted spidermite

Example applications: Fruit; Cotton; Vegetables; Ornamentals

Availability status: Obsolete

Introduction & key dates: -

EC Regulation 1107/2009 (repealing 91/414):

Status	Not listed
Dossier rapporteur/co-rapporteur	Not applicable
Date inclusion expires	Not applicable

Approved for use () or known to be used () in the following European countries:

AT

BE

BG

CY

CZ

DE

DK

EE

EL

ES

FI

FR

HR

HU

IE

IT

LT

LU

LV

MT

NL

PL

PT

RO

SE

SI

SK

UK

General status:

Pesticide type	Insecticide, Acaricide
Substance group	Bridged diphenyl
Minimum active substance purity	-
Known relevant impurities	-
Substance origin	Synthetic
Mode of action	Non-systemic, contact action.
CAS RN	495-48-7
EC number	207-802-1
CIPAC number	-
US EPA chemical code	-
Chiral molecule	No
Chemical formula	C12H10N2O
SMILES	c1(\[N+](=N\c2ccccc2)[O-])ccccc1
International Chemical Identifier key (InChIKey)	GAUZCKBSTZFWCT-YPKPFQOOSA-N
International Chemical Identifier (InChI)	InChI=1S/C12H10N2O/c15-14(12-9-5-2-6-10-12)13-11-7-3-1-4-8-11/h1-10H/b14-13-
Structure diagram/image available?	Yes
Molecular mass (g mol-1)	198.22
PIN (Preferred Identification Name)	-
IUPAC name	(Z)-diphenyldiazene-N-oxide
CAS name	1,2-diphenyldiazene-1-oxide
Other status information	-
Herbicide Resistance Classification (HRAC)	Not applicable
Herbicide Resistance Classification (WSSA)	Not applicable
Insecticide Resistance Classification (IRAC)	Not known
Fungicide Resistance Classification (FRAC)	Not applicable
Examples of recorded resistance	-
Physical state	Bright yellow-brown crystalline solid
Related substances & organisms	-

Formulations:

Property	Value
Example manufacturers & suppliers of products using this active now or historically	Sigma-Aldrich Fahlberg-List
Example products using this active	Fentoxan
UK LERAP status	No UK approval for use or outside scope
Formulation and application details	Usually formulated as an emulsifiable concentrate.

ENVIRONMENTAL FATE
for azoxybenzene

Property		Value	Source/Quality Score/Other Information	Interpretation
Solubility - In water at 20oC (mg l-1)		1.0	Q3	Low
Solubility - In organic solvents at 20oC (mg l-1)		285000	V3 - Ethanol	-
Melting point (oC)		36	V3	-
Boiling point (oC)		-	-	-
Degradation point (oC)		-	-	-
Flashpoint (oC)		-	-	-
Octanol-water partition coefficient at pH 7, 20oC	P	1.29 X 1003	Calculated	-
	Log P	3.11	V3	High
Bulk density (g ml-1)/Specific gravity		1.16	Q3	-
Dissociation constant (pKa) at 25oC		-	-	-
		Note:
Vapour pressure at 25oC (mPa)		13.0	V3	Highly volatile
Henry's law constant at 25oC (Pa m3 mol-1)		-	-	-
Henry's law constant at 20oC (dimensionless)		1.06 X 10-03	Calculated	Volatile
GUS leaching potential index		-	-	-
SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate	Value	-	-	-
	Note	-
Potential for particle bound transport index		-	-	-
Maximum UV-vis absorption L mol-1 cm-1		-	-	-
Surface tension (mN m-1)		-	-	-

Degradation:

Property		Value	Source/Quality Score/Other Information	Interpretation
Soil degradation (days) (aerobic)	DT50 (typical)	-	-	-
	DT50 (lab at 20oC)	-	-	-
	DT50 (field)	-	-	-
	DT90 (lab at 20oC)	-	-	-
	DT90 (field)	-	-	-
	Note:	-
Plant matrix DT50 (days)	Value	-	-	-
	Note	-
Aqueous photolysis DT50 (days) at pH 7	Value	-	-	-
	Note	-
Aqueous hydrolysis DT50 (days) at 20oC and pH 7	Value	-	-	-
	Note	-
Water-sediment DT50 (days)		-	-	-
Water phase only DT50 (days)		-	-	-

Soil adsorption and mobility:

Property		Value	Source/Quality Score/Other Information	Interpretation
Linear	Kd	-	-	-
	Koc	-
	Notes and range	-
Freundlich	Kf	-	-	-
	Kfoc	-
	1/n	-
	Notes and range	-
pH sensitivity		-

Other known metabolites:

Metabolite name and reference	Aliases	Formation medium / Rate	Estimated maximum occurrence fraction	Metabolising enzymes
O-hydroxyazobenzene	-	-	-	-

ECOTOXICOLOGY
for azoxybenzene

Property		Value	Source/Quality Score/Other Information	Interpretation
Bio-concentration factor	BCF (l kg-1)	-	-	-
	CT50 (days)	-		-
Mammals - Acute oral LD50 (mg kg-1)		> 515	L3 Mouse	Moderate
Mammals - Short term dietary NOEL	(mg kg-1)	-	-	-
	(ppm diet)	-		-
Birds - Acute LD50 (mg kg-1)		-	-	-
Birds - Short term dietary (LC50/LD50)		-	-	-
Fish - Acute 96 hour LC50 (mg l-1)		2.7	L3 Oncorhynchus mykiss	Moderate
Fish - Chronic 21 day NOEC (mg l-1)		-	-	-
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1)		-	-	-
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1)		-	-	-
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1)		-	-	-
Sediment dwelling organisms - Acute 96 hour LC50 (mg l-1)		-	-	-
Sediment dwelling organisms - Chronic 28 day NOEC, static, water (mg l-1)		-	-	-
Sediment dwelling organisms - Chronic 28 day NOEC, sediment (mg kg-1)		-	-	-
Aquatic plants - Acute 7 day EC50, biomass (mg l-1)		-	-	-
Non-target plants		-	-	-
		-	-	-
Algae - Acute 72 hour EC50, growth (mg l-1)		-	-	-
Algae - Chronic 96 hour NOEC, growth (mg l-1)		-	-	-
Honeybees	Contact acute 48 hour LD50 (μg bee-1)	-	-	-
	Oral acute 48 hour LD50 (μg bee-1)	-	-	-
	Unknown mode acute 48 hour LD50 (μg bee-1)	-	-	-
Earthworms - Acute 14 day LC50 (mg kg-1)		-	-	-
Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1)		-	-	-
Other soil macro-organisms - e.g. Collembola	LR50 / EC50 / NOEC / % Effect	-	-	-
Other arthropod (1)	LR50 g ha-1	-	-	-
	% Effect	-	-	-
Other arthropod (2)	LR50 g ha-1	-	-	-
	% Effect	-	-	-
Soil micro-organisms		-	-	-
Mesocosm study data	NOEAEC mg l-1	-	-	-
	NOEAEC mg l-1	-	-	-

HUMAN HEALTH AND PROTECTION
for azoxybenzene

General:

Property		Value	Source/Quality Score/Other Information	Interpretation
Threshold of Toxicological Concern (Cramer Class)		High (class III)	-	-
Mammals - Acute oral LD50 (mg kg-1)		> 515	L3 Mouse	Moderate
Mammals - Dermal LD50 (mg kg-1 body weight)		-	-	-
Mammals - Inhalation LC50 (mg l-1)		-	-	-
Other Mammal toxicity endpoints		-		-
ADI - Acceptable Daily Intake (mg kg-1bw day-1)		-	-	-
ARfD - Acute Reference Dose (mg kg-1bw day-1)		-	-	-
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1)		-	-	-
Dermal penetration studies (%)		-	-	-
Dangerous Substances Directive 76/464		-	-	-
Exposure Limits		-	-	-
Exposure Routes	Public	-
	Occupational	-
European MRLs		Click here for the EU MRL pesticide database
Drinking Water MAC (μg l-1)		-	-	-

Health issues:

Carcinogen	Mutagen	Endocrine disrupter	Reproduction / development effects	Cholinesterase inhibitor	Neurotoxicant
	-	-	-	-	-
Respiratory tract irritant	Skin irritant	Skin sensitiser	Eye irritant	Phototoxicant
		-		-
General human health issues		Liver and Kidney toxicant May cause jaundice or cyanosis

: Yes, known to cause a problem
: No, known not to cause a problem
: Possibly, status not identified
- : No data found

Handling issues:

Property		Value	Source/Quality Score/Other Information	Interpretation
General		Dust may form an explosive mixture in air
CLP classification 2013		-
EC Risk Classification		Xn - Harmful: R20/22
EC Safety Classification		S28
WHO Classification		NL	-	Not listed
US EPA Classification (formulation)		No consensus across products or no products available	-	-
UN Number		-
Waste disposal & packaging		-

TRANSLATIONS
for azoxybenzene

Language	Name
English	azoxybenzene
French	-
German	Azoxybenzol
Danish	-
Italian	azossibenzene
Spanish	-
Greek	-
Slovenian	-
Polish	-
Swedish	-
Hungarian	-
Dutch	azoxybenzeen

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Record last updated: Friday 18 March 2016
Contact: aeru@herts.ac.uk