2-hydroxyquinoxaline ** 2-quinoxalinone ** quinoxalin-2-ol ** HQO ** Translations

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GENERAL INFORMATION

Description: Chemical transformation product

Availability status: Not applicable

Introduction & key dates: Not applicable

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

Status	Not applicable
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	Metabolite
Metabolite Type	Soil, Animal
Substance group	Unclassified
Minimum active substance purity	-
Known relevant impurities	-
Substance origin	Synthetic
Mode of action	Not applicable
CAS RN	1196-57-2
EC number	214-815-6
CIPAC number	-
US EPA chemical code	Not applicable
Chiral molecule	No
Chemical formula	C8H6N2O
SMILES	Oc1cnc2ccccc2n1
International Chemical Identifier key (InChIKey)	FFRYUAVNPBUEIC-UHFFFAOYSA-N
International Chemical Identifier (InChI)	InChI=1S/C8H6N2O/c11-8-5-9-6-3-1-2-4-7(6)10-8/h1-5H,(H,10,11)
Structure diagram/image available?	Yes
Molecular mass (g mol-1)	146.1
PIN (Preferred Identification Name)	-
IUPAC name	quinoxoline-2-ol
CAS name	2-hydroxyquinoxaline
Other status information	-
Herbicide Resistance Classification (HRAC)	Not applicable
Herbicide Resistance Classification (WSSA)	Not applicable
Insecticide Resistance Classification (IRAC)	Not applicable
Fungicide Resistance Classification (FRAC)	Not applicable
Examples of recorded resistance	-
Physical state	-
Related substances & organisms	-

Can be a metabolite of:

Parent		Formation medium	Estimated maximum occurrence fraction	91/414 relevancy
quinalphos		Soil		-

Formulations:

Property	Value
Example manufacturers & suppliers of products using this active now or historically	Not applicable
Example products using this active	-
UK LERAP status	Not applicable
Formulation and application details	-

ENVIRONMENTAL FATE

Property		Value	Source/Quality Score/Other Information	Interpretation
Solubility - In water at 20oC (mg l-1)		16400	V3 - @ 25 DegC	High
Solubility - In organic solvents at 20oC (mg l-1)		-	-	-
Melting point (oC)		271	Q2	-
Boiling point (oC)		-	-	-
Degradation point (oC)		-	-	-
Flashpoint (oC)		-	-	-
Octanol-water partition coefficient at pH 7, 20oC	P	6.31 X 1000	Calculated	-
	Log P	0.8	V3	Low
Bulk density (g ml-1)/Specific gravity		1.35	Q2	-
Dissociation constant (pKa) at 25oC		-	-	-
		Note:
Vapour pressure at 25oC (mPa)		-	-	-
Henry's law constant at 25oC (Pa m3 mol-1)		0.043	V3	Non-volatile
Henry's law constant at 20oC (dimensionless)		-	-	-
GUS leaching potential index		-0.28	Calculated	Low leachability
SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate	Value	5.35 X 10-03	Calculated	-
	Note	Estimated concentrations of chemicals with Koc values greater than 9995 ml g-1 are beyond the scope of the regression data used in SCI-GROW development. If there are concerns for such chemicals, a higher tier groundwater exposure assessment should be considered, regardless of the concentration returned by SCI-GROW
Potential for particle bound transport index		-	Calculated	Medium
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)	2.5	A4	Non-persistent
	DT50 (lab at 20oC)	2.37	A3	Non-persistent
	DT50 (field)	-	-	-
	DT90 (lab at 20oC)	9.4	A3	-
	DT90 (field)	-	-	-
	Note	EU dossier Lab studies DT50 range 0.04-5.5 days, DT90 range 3.3-18.2 days - data for the sulphate salt
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	-	A3	-
	Koc	-
	Notes and range	-
Freundlich	Kf	1100	A3	Non-mobile
	Kfoc	55500
	1/n	1.06
	Notes and range	EU dossier Kf range 286-1212 mL/g, Kfoc range 12796-110154 mL/g, 1/n range 0.66-139, Soils=5 - data for the sulphate salt
pH sensitivity		-

ECOTOXICOLOGY

Property		Value	Source/Quality Score/Other Information	Interpretation
Bio-concentration factor	BCF (l kg-1)	-	-	-
	CT50 (days)	-		-
Mammals - Acute oral LD50 (mg kg-1)		-	-	-
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)		-	-	-
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

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)		-	-	-
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		No further information available

: 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		-
EC Safety Classification		-
WHO Classification		NL	-	Not listed
US EPA Classification (formulation)		Not applicable	-	-
UN Number		-
Waste disposal & packaging		-

TRANSLATIONS

Language	Name
English	2-hydroxyquinoxaline
French	-
German	-
Danish	-
Italian	-
Spanish	-
Greek	-
Slovenian	2-hidroksikvinoksalin
Polish	2-hydroksychinoksalina
Swedish	-
Hungarian	-
Dutch	-

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Record last updated: Wednesday 18 November 2015
Contact: aeru@herts.ac.uk