ethylenethiourea ** imidazolidine-2-thione ** 2-imidazoline-2-thiol ** ETU ** ethylene thiourea ** Translations

Environmental Fate - Ecotoxicology - Human Health - A to Z Index - Home

GENERAL INFORMATION

Description: A major transformation product of widely used ethylenebisdithiocarbamate fungicides

Introduction: -

EC Directive 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

HU

IE

IT

LT

LU

LV

MT

NL

PL

PT

RO

SE

SI

SK

UK

General status:

Pesticide type	Metabolite
Metabolite Type	Soil
Substance group	Thiourea
Substance origin	Synthetic
Mode of action	Not applicable
CAS RN	96-45-7
EC number	202-506-9
CIPAC number	-
US EPA chemical code	Not applicable
Chemical formula	C3H6N2S
SMILES	S=C1NCCN1
International Chemical Identifier (InChI)	InChI=1/C3H6N2S/c6-3-4-1-2-5-3/h1-2H2,(H2,4,5,6)
Structure diagram/image available?	Yes
Molecular mass (g mol-1)	102.16
IUPAC Name	ethylene thiourea
CAS Name	2-imidazolidinethione
Other status information	-
Herbicide Resistance Classification (HRAC)	Not applicable
Insecticide Resistance Classification (IRAC)	Not applicable
Fungicide Resistance Classification (FRAC)	Not applicable
Physical state	-
Related substances & organisms	-

Can be a metabolite of:

Parent		Formation Medium	Estimated Maximum Occurrence Fraction	91/414 Relevancy
mancozeb		Soil	0.031	Minor fraction, Relevant
metiram		Soil	0.12	Major fraction, Relevant
maneb		Soil	0.638	Major fraction, Relevant

Formulations:

Property	Value
Example manufacturers of products using this active	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)		20000	P3	High
Solubility - In organic solvents at 20oC (mg l-1)		-	-	-
Melting Point (oC)		203	V3	-
Boiling Point (oC)		-	-	-
Degradation point (oC)		-	-	-
Flashpoint (oC)		-	-	-
Octanol-water partition coefficient at pH 7, 20oC	P	1.41 X 10-01	Calculated	-
	Log P	-0.85	A5	Low
Bulk density (g ml-1)/Specific gravity		-	-	-
Dissociation constant (pKa) at 25oC		-	-	-
		Note:
Vapour pressure at 25oC (mPa)		13300	P3	Intermediate state
Henry's law constant at 25oC (Pa m3 mol-1)		-	-	-
Henry's law constant at 20oC (dimensionless)		2.79 X 10-05	Calculated	Volatile
GUS leaching potential index		-0.65	Calculated	Low leachability
SCI-GROW groundwater index (µg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate	Value	2.99 X 10-04	Calculated	-
	Note	-
Potential for particle bound transport index		-	Calculated	Low
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)	0.5	A5	Non-persistent
	DT50 (lab at 20oC)	0.3	A5	Non-persistent
	DT50 (field)	4	P3	Non-persistent
	DT90 (lab at 20oC)	2.0	A4	-
	DT90 (field)	-	-	-
	Note	EU dossier lab studies DT50 range 0.3-1 day, DT90 <2days; field studies DT50 range 1-7 days; Industry new study data: lab DT50 2.4 days
Aqueous photolysis DT50 (days) at pH 7	Value	1	P3	Moderately fast
	Note	-
Aqueous hydrolysis DT50 (days) at 20oC and pH 7	Value	Stable	A5	Very persistent
	Note	Stable pH 5 to pH 9
Water-Sediment DT50 (days)		8	A5	Fast
Water phase only DT50 (days)		7	A5	Moderately fast

Soil adsorption and mobility:

Property		Value	Source/Quality Score/Other Information	Interpretation
Linear	Kd	-	-	-
	Koc	-
	Notes and range	-
Freundlich	Kf	0.763	A5	Mobile
	Kfoc	70
	1/n	0.439
	Notes and range	EU dossier Kf range 0.51-1.14 mL/g, Kfoc range 34-146 mL/g, 1/n range 0.327-0.552, Soils = 4
pH sensitivity		No

ECOTOXICOLOGY

Property		Value	Source/Quality Score/Other Information	Interpretation
Bio-concentration factor	BCF	-	-	-
	CT50 (days)	-		-
Bioaccumulation potential		-	Calculated	Low
Mammals - Acute oral LD50 (mg kg-1)		> 5000	A5 Rat	Low
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)		> 490	A5 Oncorhynchus mykiss	Low
Fish - Chronic 21 day NOEC (mg l-1)		-	-	-
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1)		21.6	A5 Daphnia magna	Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1)		2.0	A5 Daphnia magna	-
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)		-	-	-
Algae - Acute 72 hour EC50, growth (mg l-1)		93.8	A5 Pseudokirchneriella subcapitata	Low
Algae - Chronic 96 hour NOEC, growth (mg l-1)		-	-	-
Honeybees - Acute 48 hour LD50 (µg bee-1)		-	-	-
Earthworms - Acute 14 day LC50 (mg kg-1)		> 1000	A5	Moderate
Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1)		-	-	-
Other soil macro-organisms - e.g. Collembola	LR50product ha EC50product ha NOECproduct ha % Effect	-	-	-
Other arthropod (1)	LR50 g ha-1	-	-	-
	% Effect	-	-	-
Other arthropod (2)	LR50 g ha-1	-	-	-
	% Effect	-	-	-
Soil micro-organisms		Nitrogen mineralisation: No significant effect Carbon mineralisation: No significant effect	A5 Dose: 4.2 kg/ha	-
Mesocosm study data	NOEAEC mg l-1	-	-	-
	NOEAEC mg l-1	-	-	-

HUMAN HEALTH AND PROTECTION

General:

Property		Value	Source/Quality Score/Other Information	Interpretation
Mammals - Acute oral LD50 (mg kg-1)		> 5000	A5 Rat	Low
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)		0.004	JMPR 1993	-
ARfD - Acute Reference Dose (mg kg-1bw day-1)		0.05	A5 Rat	-
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	-
Examples of European MRLs (mg kg-1)	Value	-
	Note	For the EU pesticides database click here
Drinking Water MAC (µg l-1)		-	-	-

Health issues:

Carcinogen	Mutagen	Endocrine disrupter	Reproduction / development effects	Acetyl cholinesterase inhibitor	Neurotoxicant	Respiratory tract irritant	Skin irritant	Eye irritant
	-			-	-	-	-	-
General human health issues		[A mutagen, teratogen, and carcinogen]

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

Handling issues:

Property		Value	Source/Quality Score/Other Information	Interpretation
General		[No information available]
EC Risk Classification		[Reproduction risk category 2: R61], [Xn - Harmful: R22]
EC Safety Classification		S45, S53
WHO Classification		NL	-	Not listed
US EPA Classification (formulation)		Not applicable	-	-
UN Number		-
Waste disposal & packaging		-

TRANSLATIONS