| mepronil (Ref: B1 2459) |
 |
Environmental Fate - Ecotoxicology - Human Health - A to Z Index - Home
GENERAL INFORMATION 
for mepronil
Description: A systemic fungicide used to control diseases caused by Basidomycetes
Example pests controlled: Rhizoctonia spp.; Puccinia spp.; Sheath blight; Root rot; Rust; Damping off
Example applications: Rice; Potatoes; Cotton; Top fruit
Efficacy & activity: -
Availability status: Obsolete
Introduction & key dates: 1981
EC Regulation 1107/2009 (repealing 91/414):
| Status | Not approved |
| Dossier rapporteur/co-rapporteur | - |
| Date inclusion expires | Expired |
| EU Candidate for substitution (CfS) | - |
| 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 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Chemical structure:
| Isomerism | None |
| Chemical formula | C17H19NO2 |
| Canonical SMILES | CC1=CC=CC=C1C(=O)NC2=CC(=CC=C2)OC(C)C |
| Isomeric SMILES | No data |
| International Chemical Identifier key (InChIKey) | BCTQJXQXJVLSIG-UHFFFAOYSA-N |
| International Chemical Identifier (InChI) | InChI=1S/C17H19NO2/c1-12(2)20-15-9-6-8-14(11-15)18-17(19)16-10-5-4-7-13(16)3/h4-12H,1-3H3,(H,18,19) |
| 2D structure diagram/image available? | Yes |
General status:
| Pesticide type | Fungicide | |||
| Substance group | Benzanilide | |||
| Minimum active substance purity | - | |||
| Known relevant impurities | - | |||
| Substance origin | Synthetic | |||
| Mode of action | Systemic with protective and curative action. Succinate DeHydrogenase Inhibitor. | |||
| CAS RN | 55814-41-0 | |||
| EC number | - | |||
| CIPAC number | 533 | |||
| US EPA chemical code | - | |||
| PubChem CID | 41632 | |||
| Molecular mass (g mol-1) | 269.33 | |||
| PIN (Preferred Identification Name) | - | |||
| IUPAC name | 3'-isopropoxy-o-toluanilide | |||
| CAS name | 2-methyl-N-(3-(1-methylethoxy)phenyl)benzamide | |||
| Other status information | - | |||
| 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) | 7 | |||
| Examples of recorded resistance | - | |||
| Physical state | Colourless crystals | |||
| Related substances & organisms | - | |||
Formulations:
| Property |
Value | |||
| Example manufacturers & suppliers of products using this active now or historically | - | |||
| Example products using this active | - | |||
| UK LERAP status | No UK approval for use as a pesticide under EC Regulation 1107/2009 | |||
| Formulation and application details | - | |||
ENVIRONMENTAL FATE
for mepronil
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Solubility - In water at 20oC (mg l-1) | 12.7 | L3 | Low | |
| Solubility - In organic solvents at 20oC (mg l-1) | 500000 | L3 - Acetone | - | |
| 380000 | L3 - Methanol | - | ||
| 1370 | L3 - n-Hexane | - | ||
| 160000 | L3 - Toluene | - | ||
| Melting point (oC) | 91.4 | L3 | - | |
| Boiling point (oC) | - | - | - | |
| Degradation point (oC) | - | - | - | |
| Flashpoint (oC) | 225 | L3 | - | |
| Octanol-water partition coefficient at pH 7, 20oC | P | 4.57 X 1003 | Calculated | - |
| Log P | 3.66 | L3 | High | |
| Bulk density (g ml-1)/Specific gravity | 1.11 | Q2 | - | |
| Dissociation constant (pKa) at 25oC | - | - | - | |
| Note: | ||||
| Vapour pressure at 20oC (mPa) | 0.056 | L3 | Low volatility | |
| Henry's law constant at 25oC (Pa m3 mol-1) | 1.19 X 10-03 | L3 | Non-volatile | |
GUS leaching potential index  |
1.72 | Calculated | Low leachability | |
| SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate |
Value | 5.34 X 10-02 | Calculated | - |
| Note | - | |||
| 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 |
General biodegradability | - |
| Soil degradation (days) (aerobic) | DT50 (typical) | 50 | L3 | Moderately persistent |
| DT50 (lab at 20oC) | - | - | - | |
| DT50 (field) | - | - | - | |
| DT90 (lab at 20oC) | - | - | - | |
| DT90 (field) | - | - | - | |
| DT50 modelling endpoint | - | - | - | |
| Note | Best available data | |||
| Dissipation rate RL50 on plant matrix | Value | - | - | - |
| Note | - | |||
| Dissipation rate RL50 on and in plant matrix | Value | 2.3 | R3 | - |
| Note | Rice leaves, n=1 | |||
| Aqueous photolysis DT50 (days) at pH 7 | Value | 6.6 | L3 | Moderately fast |
| Note | DT50: 6.6 days in natural waters, 4.5 days in pure water | |||
| Aqueous hydrolysis DT50 (days) at 20oC and pH 7 | Value | Stable | W4 | - |
| Note | pH sensitive: DT50 261 days at pH 4, 276 days at pH 7, 253 days at pH 9, all at 25 degC (L3) | |||
| Water-sediment DT50 (days) | - | - | - | |
| Water phase only DT50 (days) | - | - | - | |
Soil adsorption and mobility:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Linear | Kd | - | P3 | Slightly mobile |
| Koc | 974 | |||
| Notes and range | Best available data | |||
| Freundlich | Kf | - | - | - |
| Kfoc | - | |||
| 1/n | - | |||
| Notes and range | - | |||
| pH sensitivity | - | |||
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Bio-concentration factor | BCF (l kg-1) | 268 | Q2 Estimated | Threshold for concern |
| CT50 (days) | Not available | - | ||
| Mammals - Acute oral LD50 (mg kg-1) | > 10000 | L3 Rat | Low | |
| Mammals - Short term dietary NOEL | (mg kg-1) | 5.9 | L2 Rat, 2 year | High |
| (ppm diet) | - | - | ||
| Birds - Acute LD50 (mg kg-1) | > 8000 | L2 Gallus gallus | Low | |
| Birds - Short term dietary (LC50/LD50) | - | - | - | |
| Fish - Acute 96 hour LC50 (mg l-1) | > 10 | F4 Oncorhynchus mykiss | Moderate | |
| Fish - Chronic 21 day NOEC (mg l-1) | - | - | - | |
| Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) | > 5.0 | F4 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) | - | - | - | |
| 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) | > 100 | L3 | Low | |
| 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 mepronil
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) | > 10000 | L3 Rat | Low | |
| Mammals - Dermal LD50 (mg kg-1 body weight) | > 10000 | L3 Rat | - | |
| Mammals - Inhalation LC50 (mg l-1) | 1.32 | L3 Rat | - | |
| Other Mammal toxicity endpoints | - | - | ||
| ADI - Acceptable Daily Intake (mg kg-1bw day-1) | 0.05 | L3 | - | |
| 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 | |||
- |
- |
- |
- |
|
- |
|||
| 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 | None allocated at this time | |||
| EC Risk Classification |
Not classified: Obsolete | |||
| EC Safety Classification |
Not classified: Obsolete | |||
| WHO Classification | U | - | Unlikely to present an acute hazard | |
| US EPA Classification (formulation) | IV | - | Caution - Not acutely toxic | |
| UN Number | - | |||
| Waste disposal & packaging |
- | |||
| Language | Name |
| English | mepronil |
| French | mepronil |
| German | Mepronil |
| Danish | mepronil |
| Italian | mepronil |
| Spanish | mepronil |
| Greek | - |
| Slovenian | mepronil |
| Polish | mepronil |
| Swedish | - |
| Hungarian | - |
| Dutch | - |
Record last updated: Wednesday 23 May 2018
Contact: aeru@herts.ac.uk