| ethylenethiourea |
 |
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GENERAL INFORMATION 
Description: A major transformation product of widely used ethylenebisdithiocarbamate fungicides
Availability status: Not applicable
Introduction & key dates: -
EC Regulation 1107/2009 (repealing 91/414):
| Status | Not applicable |
| Dossier rapporteur/co-rapporteur | Not applicable |
| Date inclusion expires | Not applicable |
| EU Candidate for substitution (CfS) | Not applicable |
| Listed in EU database | No |
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 |
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Chemical structure:
| Isomerism | - |
| Chemical formula | C3H6N2S |
| Canonical SMILES | C1CNC(=S)N1 |
| Isomeric SMILES | No data |
| International Chemical Identifier key (InChIKey) | PDQAZBWRQCGBEV-UHFFFAOYSA-N |
| International Chemical Identifier (InChI) | InChI=1S/C3H6N2S/c6-3-4-1-2-5-3/h1-2H2,(H2,4,5,6) |
| 2D structure diagram/image available? | Yes |
General status:
| Pesticide type | Metabolite | |||
| Metabolite Type | Soil, Surface water, Sediment, Groundwater, Animal | |||
| Substance group | Thiourea | |||
| Minimum active substance purity | - | |||
| Known relevant impurities | - | |||
| Substance origin | Synthetic | |||
| Mode of action | Not applicable | |||
| CAS RN | 96-45-7 | |||
| EC number | 202-506-9 | |||
| CIPAC number | - | |||
| US EPA chemical code | 600016 | |||
| PubChem CID | - | |||
| CLP index number | 613-039-00-9 | |||
| Molecular mass (g mol-1) | 102.16 | |||
| PIN (Preferred Identification Name) | - | |||
| IUPAC name | imidazolidine-2-thione | |||
| CAS name | 2-imidazolidinethione | |||
| Other status information | Volatile organic compound (VOC) | |||
| Relevant Environmental Water Quality Standards | - | |||
| 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 | 1107/2009 relevancy |
|
| metiram | Soil | 0.112 | Major fraction, Relevant | |
| mancozeb | Soil | 0.248 | Major fraction, Relevant | |
| maneb | Soil | 0.638 | Major fraction, Relevant | |
Formulations:
| Property |
Value | |||
| Example manufacturers & suppliers of products using this active now or historically | - | |||
| Example products using this active |
|
|||
| UK LERAP status | Not applicable | |||
| Formulation and application details | - | |||
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Solubility - In water at 20oC (mg l-1) | 1000 | A4 | High | |
| Solubility - In organic solvents at 20oC (mg l-1) | 100000 | P3 - DMSO | - | |
| 3000 | P3 - Ethanol (955) | - | ||
| Melting point (oC) | 203 | P3 | - | |
| Boiling point (oC) | - | - | - | |
| Degradation point (oC) | - | - | - | |
| Flashpoint (oC) | - | - | - | |
| Octanol-water partition coefficient at pH 7, 20oC | P | 2.19 X 10-01 | Calculated | - |
| Log P | -0.66 | A3 - predicted | Low | |
| Bulk density (g ml-1)/Specific gravity | - | - | - | |
| Dissociation constant (pKa) at 25oC | - | - | - | |
| Note: | ||||
| Vapour pressure at 20oC (mPa) | 3,1 X 10-03 | A5 | Low volatility | |
| Henry's law constant at 25oC (Pa m3 mol-1) | - | - | - | |
GUS leaching potential index  |
-0.35 | Calculated | Low leachability | |
| SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate |
Value | 4.32 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 |
General biodegradability | - |
| Soil degradation (days) (aerobic) | DT50 (typical) | 0.69 |
A5 | Non-persistent |
| DT50 (lab at 20oC) | 0.69 | A5 | Non-persistent | |
| DT50 (field) | - | - | - | |
| DT90 (lab at 20oC) | 9.4 | A5 | - | |
| DT90 (field) | - | - | - | |
| DT50 modelling endpoint | 0.7 | A5 Geometric mean of normalised lab study values | - | |
| Note | EU 2018 dossier lab studies (normalised) DT50 range 0.1-12.8 days, DT90 0.3-50.4 days, Soils=13 | |||
| Dissipation rate RL50 on plant matrix | Value | - | - | - |
| Note | - | |||
| Dissipation rate RL50 on and in plant matrix | Value | 8.6 | R4 | - |
| Note | Published literature RL50 range 3.3-19.5 days, 4 field grown crops, various matrices, n=4 | |||
| 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 | - |
| 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 2018 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 | |||
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Bio-concentration factor | BCF (l kg-1) | - | - | - |
| CT50 (days) | - | - | ||
| Mammals - Acute oral LD50 (mg kg-1) | 545 | A5 Rat | Moderate | |
| Mammals - Short term dietary NOEL | (mg kg-1) | - | - | - |
| (ppm diet) | - | - | ||
| Birds - Acute LD50 (mg kg-1) | > 2250 | A5 Colinus virginianus | Low | |
| 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) | 10.0 | A5 Xenopus laevis | Moderate | |
| 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 | Moderate | |
| Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) | 11 | A5 Americamysis bahia | Moderate | |
| 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) | > 960 | A5 Lemna minor | Low | |
| Non-target plants | - | - | - | |
| - | - | - | ||
| 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 (Apis spp.) | Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - |
| Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - | |
| Unknown mode acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - | |
| Bumblebees (Bombus spp.) | Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - |
| - | ||||
| Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - | |
| - | ||||
| Mason bees (Osmia spp.) | Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - |
| Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - | |
| Other pollinators (1) | Acute LD50 (worst case from 24 , 48 and 72 hour values - μg insect-1) | - | - | - |
| Mode of exposure | - | |||
| Other pollinators (2) | Acute LD50 (worst case from 24 , 48 and 72 hour values - μg insect-1) | - | - | - |
| Mode of exposure | - | |||
| Earthworms - Acute 14 day LC50 (mg kg-1) | > 1000 | A5 Eisenia foetida | Low | |
| Earthworms - Chronic NOEC, reproduction (mg kg-1) | 24 | A5 Eisenia foetida | Moderate | |
| Other soil macro-organisms | Acute LC50 (mg kg-1) | - | - | - | Chronic NOEC (mg kg-1) | - | - | - |
| Other arthropod (1) | LR50 g ha-1 | - | - | - |
| % Effect | - | - | - | |
| Other arthropod (2) | LR50 g ha-1 | - | - | - |
| % Effect | - | - | - | |
| Soil micro-organisms | Nitrogen mineralisation: No significant adverse effect Carbon mineralisation: No significant adverse effect |
A5 Dose: 4.2 kg ha-1 |
- | |
| Mesocosm study data | NOEAEC mg l-1 | - | - | - |
| NOEAEC mg l-1 | - | - | - | |
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) | 545 | A5 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) | 0.002 | A5 | - | |
| ARfD - Acute Reference Dose (mg kg-1bw day-1) | 0.05 | A5 | - | |
| AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw day-1) | 0.05 | A5 | - | |
| AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) | 0.005 | A5 | - | |
| Dermal penetration studies (%) | - | - | - | |
| Dangerous Substances Directive 76/464 | - | - | - | |
| Exposure Routes | Public | - | ||
| Occupational | - | |||
| European MRLs | Click here for the EU MRL pesticide database | |||
| Drinking Water Standards | - | - | - | |
| Drinking Water MAC (μg l-1) | - | - | - | |
Health issues:
| Carcinogen | Genotoxic | Endocrine disrupter | Reproduction / development effects | Cholinesterase inhibitor | Neurotoxicant | |||
|
A0; B0; C0; D0; E3 |
|
|
- |
- |
|||
| Respiratory tract irritant | Skin irritant | Skin sensitiser | Eye irritant | Phototoxicant | ||||
- |
- |
- |
- |
- |
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| General human health issues | Various sources report this substance as mutagen, teratogen, and carcinogen IARC Group 3 carcinogen; USEPA - probable human carcinogen |
|||||||
| Key: Genotoxicity A: Chromosome aberration (EFSA database) B: DNA damage/repair (EFSA database) C: Gene mutation (EFSA database) D: Genome mutation (EFSA database) E: Unspecified genotoxicity type (miscellaneous data source) 0: No data 1: Positive 2: Mixed/ambiguous results 3: Negative |
Key: Other : Yes, known to cause a problem  : No, known not to cause a problem  : Possibly, status not identified - : No data found |
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Handling issues:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| General |
No information available | |||
| CLP classification 2013 | - | |||
| EC Risk Classification |
Reproduction risk category 2: R61 Xn - Harmful: R22 |
|||
| EC Safety Classification |
S45, S53 | |||
| WHO Classification | NL | - | Not listed | |
| UN Number | - | |||
| Waste disposal & packaging |
- | |||
| Language | Name |
| English | ethylenethiourea |
| French | ethylene thiouree |
| German | Ethylenthioharnstoff |
| Danish | ethylenthiourinstof |
| Italian | etilentiourea |
| Spanish | etilentiourea |
| Greek | - |
| Slovenian | etilenetiurea |
| Polish | imidazolidyno-2-tion |
| Swedish | - |
| Hungarian | - |
| Dutch | ethyleenthioureum |
Record last updated: Friday 08 November 2019
Contact: aeru@herts.ac.uk