benquinox (Ref: BAY 15080) ** cerenox ** HSDB 2759 ** benguinox ** tserenox ** COBH ** Translations

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SUMMARY

Benquinox is an obsolete fungicide no long approved for use in most of the developed world. It has a low aqueous solubility and is slightly mobile. There are large gaps in data in the public domain regarding its environmental fate. It is moderately toxic to mammals and highly toxic to fish.

GENERAL INFORMATION
for benquinox

Description: An obsolete fungicide used mainly as a seed dressing to control soil borne diseases

Example pests controlled: Seedling blight; Leafspot

Example applications: Grains

Availability status: Obsolete

Introduction & key dates: 1956

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	Fungicide
Substance group	Quinone
Minimum active substance purity	-
Known relevant impurities	-
Substance origin	Synthetic
Mode of action	Systemic
CAS RN	495-73-8
EC number	207-807-9
CIPAC number	137
US EPA chemical code	281100
Chiral molecule	No
Chemical formula	C13H11N3O2
SMILES	O=Nc2ccc(NNC(=O)c1ccccc1)cc2
International Chemical Identifier key (InChIKey)	MQIVNMHALJNFMG-UHFFFAOYSA-N
International Chemical Identifier (InChI)	InChI=1S/C13H11N3O2/c17-13(10-4-2-1-3-5-10)15-14-11-6-8-12(16-18)9-7-11/h1-9,18H,(H,15,17)/b14-11-,16-12-
Structure diagram/image available?	Yes
Molecular mass (g mol-1)	241.25
PIN (Preferred Identification Name)	N'-[4-(hydroxyimino)cyclohexa-2,5-dien-1-ylidene]benzohydrazide
IUPAC name	2'-(4-hydroxyiminocyclohexa-2,5-dienylidene)benzohydrazide
CAS name	benzoic acid [4-(hydroxyimino)-2,5-cyclohexadien-1-ylidene]hydrazide
Other status information	Marine Pollutant
Herbicide Resistance Classification (HRAC)	Not applicable
Herbicide Resistance Classification (WSSA)	Not applicable
Insecticide Resistance Classification (IRAC)	Not applicable
Fungicide Resistance Classification (FRAC)	Not known
Examples of recorded resistance	-
Physical state	Yellow-brown coloured crystals
Related substances & organisms	-

Formulations:

Property	Value
Example manufacturers & suppliers of products using this active now or historically	Bayer AG
Example products using this active	Ceredon Cereline Tillantox
UK LERAP status	No UK approval for use or outside scope
Formulation and application details	-

ENVIRONMENTAL FATE
for benquinox

Property		Value	Source/Quality Score/Other Information	Interpretation
Solubility - In water at 20oC (mg l-1)		5.0	V3 - @ 25 DegC	Low
Solubility - In organic solvents at 20oC (mg l-1)		-	-	-
Melting point (oC)		Decomposes before melting	L3	-
Boiling point (oC)		Decomposes before boiling	Q3	-
Degradation point (oC)		207	Q3	-
Flashpoint (oC)		-	-	-
Octanol-water partition coefficient at pH 7, 20oC	P	1.74 X 1003	Calculated	-
	Log P	3.24	V3	High
Bulk density (g ml-1)/Specific gravity		1.24	Q2	-
Dissociation constant (pKa) at 25oC		-	-	-
		Note:
Vapour pressure at 25oC (mPa)		-	-	-
Henry's law constant at 25oC (Pa m3 mol-1)		-	-	-
Henry's law constant at 20oC (dimensionless)		-	-	-
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	-	Q2	Slightly mobile
	Koc	991
	Notes and range	Estimated
Freundlich	Kf	-	-	-
	Kfoc	-
	1/n	-
	Notes and range	-
pH sensitivity		-

ECOTOXICOLOGY
for benquinox

Property		Value	Source/Quality Score/Other Information	Interpretation
Bio-concentration factor	BCF (l kg-1)	-	-	-
	CT50 (days)	-		-
Mammals - Acute oral LD50 (mg kg-1)		100	V3 Rat	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)		0.048	L3 Oncorhynchus mykiss	High
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 benquinox

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)		100	V3 Rat	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		Harmful if swallowed

: 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		No information available
CLP classification 2013		-
EC Risk Classification		T - Toxic: R25 Xn - Harmful: R21
EC Safety Classification		S1/2, S36/37, S45
WHO Classification		O	-	Obsolete substance
US EPA Classification (formulation)		No consensus across products or no products available	-	-
UN Number		-
Waste disposal & packaging		-

TRANSLATIONS
for benquinox

Language	Name
English	benquinox
French	benquinox
German	Benchinox
Danish	-
Italian	-
Spanish	benquinox
Greek	-
Slovenian	-
Polish	benchinoks
Swedish	-
Hungarian	-
Dutch	-

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Record last updated: Thursday 31 December 2015
Contact: aeru@herts.ac.uk