| EPTC (Ref: R 1608) |
 |
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GENERAL INFORMATION 
for EPTC
Description: A herbicide used for pre-emergence control of annual and perennial grasses plus some broad-leaved weeds
Example pests controlled: Couch; Sedges; Bermudagrass; Pigweed; Lambsquarters; Nightshade; Foxtails; Barnyard grass; bents
Example applications: Vegetables including peas, beans; Alfalfa; Forage legumes; Potatoes; Corn; Sweet potatoes
Efficacy & activity: -
Availability status: Current
Introduction & key dates: circa 1957
EC Regulation 1107/2009 (repealing 91/414):
| Status | Not approved |
| Dossier rapporteur/co-rapporteur | Not applicable |
| Date inclusion expires | Expired |
| EU Candidate for substitution (CfS) | Not applicable |
| Listed in EU database | Yes |
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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Also used in: USA
Chemical structure:
| Isomerism | - |
| Chemical formula | C9H19NOS |
| Canonical SMILES | CCCN(CCC)C(=O)SCC |
| Isomeric SMILES | No data |
| International Chemical Identifier key (InChIKey) | GUVLYNGULCJVDO-UHFFFAOYSA-N |
| International Chemical Identifier (InChI) | InChI=1S/C9H19NOS/c1-4-7-10(8-5-2)9(11)12-6-3/h4-8H2,1-3H3 |
| 2D structure diagram/image available? | Yes |
General status:
| Pesticide type | Herbicide | |||
| Substance group | Thiocarbamate | |||
| Minimum active substance purity | - | |||
| Known relevant impurities | - | |||
| Substance origin | Synthetic | |||
| Mode of action | Selective, systemic absorbed by roots and shoots. Lipid synthesis inhibitor. | |||
| CAS RN | 759-94-4 | |||
| EC number | 212-073-8 | |||
| CIPAC number | 155 | |||
| US EPA chemical code | 041401 | |||
| PubChem CID | 12968 | |||
| Molecular mass (g mol-1) | 189.3 | |||
| PIN (Preferred Identification Name) | S-ethyl dipropylcarbamothioate | |||
| IUPAC name | S-ethyl dipropyl(thiocarbamate) | |||
| CAS name | S-ethyl dipropylcarbamothioate | |||
| Other status information | Potential groundwater contaminant; PAN listed Highly Hazardous Chemical | |||
| Relevant Environmental Water Quality Standards | - | |||
| Herbicide Resistance Classification (HRAC) | N | |||
| Herbicide Resistance Classification (WSSA) | 8 | |||
| Insecticide Resistance Classification (IRAC) | Not applicable | |||
| Fungicide Resistance Classification (FRAC) | Not applicable | |||
| Examples of recorded resistance | - | |||
| Physical state | Pale yellow liquid | |||
| Related substances & organisms | - | |||
Formulations:
| Property |
Value | |||
| Example manufacturers & suppliers of products using this active now or historically |
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| Example products using this active |
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| UK LERAP status | No UK approval for use as a pesticide under EC Regulation 1107/2009 | |||
| Formulation and application details | Usually formulated as an emulsifiable concentrate or as granules. | |||
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Solubility - In water at 20oC (mg l-1) | 370 | K4 | Moderate | |
| Solubility - In organic solvents at 20oC (mg l-1) | Miscible | C4 - Acetone | - | |
| Miscible | C4 - Benzene | - | ||
| Miscible | C4 - Xylene | - | ||
| Miscible | C4 - Ethanol | - | ||
| Melting point (oC) | Not applicable | L3 | - | |
| Boiling point (oC) | 127 | L3 | - | |
| Degradation point (oC) | 200 | L2 | - | |
| Flashpoint (oC) | 110 | L3 | - | |
| Octanol-water partition coefficient at pH 7, 20oC | P | 1.58 X 1003 | Calculated | - |
| Log P | 3.2 | G4 | High | |
| Bulk density (g ml-1)/Specific gravity | 0.96 | L3 | - | |
| Dissociation constant (pKa) at 25oC | Not applicable | Q3 | - | |
| Note: No dissociation | ||||
| Vapour pressure at 20oC (mPa) | 4500 | G3 | Highly volatile | |
| Henry's law constant at 25oC (Pa m3 mol-1) | 5.00 X 10-06 | L3 | Non-volatile | |
GUS leaching potential index  |
1.34 | Calculated | Low leachability | |
| SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate |
Value | 5.12 X 10-03 | 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) | 6 | M3 | Non-persistent |
| DT50 (lab at 20oC) | - | - | - | |
| DT50 (field) | 18 | C4 | Non-persistent | |
| DT90 (lab at 20oC) | - | - | - | |
| DT90 (field) | - | - | - | |
| DT50 modelling endpoint | - | - | - | |
| Note | Literature DT50 range 6-30 days in the field; Other sources: DT50 30-60 days (R3) | |||
| Dissipation rate RL50 on plant matrix | Value | - | - | - |
| Note | - | |||
| Dissipation rate RL50 on and in plant matrix | Value | - | - | - |
| Note | - | |||
| Aqueous photolysis DT50 (days) at pH 7 | Value | - | - | - |
| Note | - | |||
| Aqueous hydrolysis DT50 (days) at 20oC and pH 7 | Value | 300 | C4 | Persistent |
| Note | - | |||
| Water-sediment DT50 (days) | - | - | - | |
| Water phase only DT50 (days) | - | - | - | |
Soil adsorption and mobility:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Linear | Kd | - | G3 | Moderately mobile |
| Koc | 300 | |||
| Notes and range | Other literature sources: 109-240 mL/g (R3) | |||
| Freundlich | Kf | 0.76 | R3 | Moderately mobile |
| Kfoc | 187.7 | |||
| 1/n | 0.905 | |||
| Notes and range | Literature data: Kf range 0.36-0.47 mL/g, Kfoc range 153-222 mL/g, 1/n range 0.826-0.984, soils=2 | |||
| pH sensitivity | - | |||
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Bio-concentration factor | BCF (l kg-1) | 60 | P4 | Low potential |
| CT50 (days) | Not available | - | ||
| Mammals - Acute oral LD50 (mg kg-1) | 916 | V3 Rat | Moderate | |
| Mammals - Short term dietary NOEL | (mg kg-1) | - | L2 Rat, 21 day | - |
| (ppm diet) | 326 | - | ||
| Birds - Acute LD50 (mg kg-1) | 1000 | F3 Anas platyrhynchos | Moderate | |
| Birds - Short term dietary (LC50/LD50) | - | - | - | |
| Fish - Acute 96 hour LC50 (mg l-1) | 14 | L3 Lepomis macrochirus | Moderate | |
| Fish - Chronic 21 day NOEC (mg l-1) | - | - | - | |
| Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) | 14 | L3 Daphnia magna | Moderate | |
| 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) | 2.9 | F1 Lemna gibba, 96 hour | Moderate | |
| Non-target plants | - | - | - | |
| - | - | - | ||
| Algae - Acute 72 hour EC50, growth (mg l-1) | 5.46 | F4 Pseudokirchneriella subcapitata | Moderate | |
| 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) | 11.0 | L3 | Moderate | |
| Unknown mode acute 48 hour LD50 (μg bee-1) | - | - | - | |
| Earthworms - Acute 14 day LC50 (mg kg-1) | 267 | L3 | Moderate | |
| 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 EPTC
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) | 916 | V3 Rat | Moderate | |
| Mammals - Dermal LD50 (mg kg-1 body weight) | > 2000 | L3 Rat | - | |
| Mammals - Inhalation LC50 (mg l-1) | 3.8 | L3 Rat | - | |
| Other Mammal toxicity endpoints | - | - | ||
| ADI - Acceptable Daily Intake (mg kg-1bw day-1) | - | - | - | |
| ARfD - Acute Reference Dose (mg kg-1bw day-1) | - | - | - | |
| AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw 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 Standards | - | - | - | |
| Drinking Water MAC (μg l-1) | - | - | - | |
Health issues:
| Carcinogen | Mutagen | Endocrine disrupter | Reproduction / development effects | Cholinesterase inhibitor | Neurotoxicant | |||
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| Respiratory tract irritant | Skin irritant | Skin sensitiser | Eye irritant | Phototoxicant | ||||
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| 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 | Health: H302 | |||
| EC Risk Classification |
Xn - Harmful: R22 | |||
| EC Safety Classification |
S2, S23 | |||
| WHO Classification | II | - | Moderately hazardous | |
| US EPA Classification (formulation) | III | - | Caution - Slightly toxic | |
| UN Number | - | |||
| Waste disposal & packaging |
- | |||
| Language | Name |
| English | EPTC |
| French | EPTC |
| German | EPTC |
| Danish | EPTC |
| Italian | EPTC |
| Spanish | EPTC |
| Greek | EPTC |
| Slovenian | EPTC |
| Polish | EPTC |
| Swedish | EPTC |
| Hungarian | EPTC |
| Dutch | EPTC |
Record last updated: Monday 28 May 2018
Contact: aeru@herts.ac.uk