| resmethrin (Ref: OMS 1206) |
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GENERAL INFORMATION 
for resmethrin
Description: A broad spectrum insecticide effective against a wide range of crawling and flying pests
Example pests controlled: Mosquitoes; Fleas; House flies; Blackflies; Gnats; Fruit flies; Wasps; Hornets; Coachroaches; Crickets; Ants; Carpet beetles
Example applications: Residences and other buildings; Landscapes; Muschroom houses; Industrial sites; Store produce; Fabric protection
Efficacy & activity: -
Availability status: Current
Introduction & key dates: 1967, first produced; 1969, first marketed in Japan
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) | - |
| 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 | A chiral molecule. The technical material is an isomeric mixture of four optical isomers: [1R, trans]-, [1R, cis]-, [1S, trans]- and [1S, cis]- in roughly the ration 4:1:4:1. |
| Chemical formula | C22H26O3 |
| Canonical SMILES | CC(=CC1C(C1(C)C)C(=O)OCC2=COC(=C2)CC3=CC=CC=C3)C |
| Isomeric SMILES | No data |
| International Chemical Identifier key (InChIKey) | VEMKTZHHVJILDY-UHFFFAOYSA-N |
| International Chemical Identifier (InChI) | InChI=1S/C22H26O3/c1-15(2)10-19-20(22(19,3)4)21(23)25-14-17-12-18(24-13-17)11-16-8-6-5-7-9-16/h5-10,12-13,19-20H,11,14H2,1-4H3 |
| 2D structure diagram/image available? | Yes |
General status:
| Pesticide type | Insecticide | |
| Substance group | Pyrethroid | |
| Minimum active substance purity | - | |
| Known relevant impurities | - | |
| Substance origin | Synthetic | |
| Mode of action | Non-systemic with contact action. Sodium channel modulator. | |
| CAS RN | 10453-86-8 | |
| EC number | 233-940-7 | |
| CIPAC number | 268 | |
| US EPA chemical code | 097801 | |
| PubChem CID | 5053 | |
| Molecular mass (g mol-1) | 338.4 | |
| PIN (Preferred Identification Name) | (5-benzylfuran-3-yl)methyl (1E,3E)-2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropane-1-carboxylate | |
| IUPAC name | 5-benzyl-3-furylmethyl (1RS,3RS;1RS,3SR)-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylate | |
| CAS name | [5-(phenylmethyl)-3-furanyl]methyl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylate | |
| Other status information | - | |
| Relevant Environmental Water Quality Standards | - | |
| Herbicide Resistance Classification (HRAC) | Not applicable | |
| Herbicide Resistance Classification (WSSA) | Not applicable | |
| Insecticide Resistance Classification (IRAC) | 3 | |
| Fungicide Resistance Classification (FRAC) | Not applicable | |
| Examples of recorded resistance | Blattella germanica Culex quinquefasciatus Musca domestica Plutella xylostella Trialeurodes vaporariorum |
|
| Physical state | Off-white to tan solid | |
| 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, emulsion or ULV. | |||
ENVIRONMENTAL FATE
for resmethrin
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Solubility - In water at 20oC (mg l-1) | 0.01 | G4 | Low | |
| Solubility - In organic solvents at 20oC (mg l-1) | - | - | - | |
| Melting point (oC) | 56.5 | L3 | - | |
| Boiling point (oC) | Decomposes before boiling | L3 | - | |
| Degradation point (oC) | 180 | L3 | - | |
| Flashpoint (oC) | 129 | L3 | - | |
| Octanol-water partition coefficient at pH 7, 20oC | P | 2.69 X 1005 | Calculated | - |
| Log P | 5.43 | L3 | High | |
| Bulk density (g ml-1)/Specific gravity | 0.96 | L3 | - | |
| Dissociation constant (pKa) at 25oC | - | - | - | |
| Note: | ||||
| Vapour pressure at 20oC (mPa) | 0.0015 | G4 | Low volatility | |
| Henry's law constant at 25oC (Pa m3 mol-1) | 8.93 X 10-02 | L3 | Non-volatile | |
GUS leaching potential index  |
-1.48 | 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 |
General biodegradability | - |
| Soil degradation (days) (aerobic) | DT50 (typical) | 30 | G4 | 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 | - | - | - |
| Note | - | |||
| Aqueous photolysis DT50 (days) at pH 7 | Value | - | - | - |
| Note | - | |||
| Aqueous hydrolysis DT50 (days) at 20oC and pH 7 | Value | 485 | F2 | Very 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 | Non-mobile |
| Koc | 100000 | |||
| Notes and range | - | |||
| Freundlich | Kf | - | - | - |
| Kfoc | - | |||
| 1/n | - | |||
| Notes and range | - | |||
| pH sensitivity | - | |||
Key metabolites:
| Metabolite | Formation medium | Estimated maximum occurrence fraction | 1107/2009 relevancy |
|
| chrysanthemic acid | Soil | - | - | |
| benzaldehyde | Soil | - | - | |
| benzyl alcohol | Soil | - | - | |
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Bio-concentration factor | BCF (l kg-1) | 68 | Q3 | Low potential |
| CT50 (days) | Not available | - | ||
| Mammals - Acute oral LD50 (mg kg-1) | > 2500 | G4 Rat | Low | |
| Mammals - Short term dietary NOEL | (mg kg-1) | - | L3 Rat | - |
| (ppm diet) | 3000 | - | ||
| Birds - Acute LD50 (mg kg-1) | 2000 | G4 Phasianidae | Moderate | |
| Birds - Short term dietary (LC50/LD50) | - | - | - | |
| Fish - Acute 96 hour LC50 (mg l-1) | 0.017 | L3 Lepomis macrochirus | High | |
| Fish - Chronic 21 day NOEC (mg l-1) | - | - | - | |
| Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) | 0.0037 | L3 Daphnia magna | High | |
| 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) | 1.6 | K3 Unknown species | Moderate | |
| Algae - Chronic 96 hour NOEC, growth (mg l-1) | - | - | - | |
| Honeybees | Contact acute 48 hour LD50 (μg bee-1) | 0.063 | G4 | High |
| 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
for resmethrin
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) | > 2500 | G4 Rat | Low | |
| Mammals - Dermal LD50 (mg kg-1 body weight) | > 3000 | L3 Rat | - | |
| Mammals - Inhalation LC50 (mg l-1) | 9.49 | L3 Rat | - | |
| Other Mammal toxicity endpoints | - | - | ||
| ADI - Acceptable Daily Intake (mg kg-1bw day-1) | 0.125 | L3 | - | |
| ARfD - Acute Reference Dose (mg kg-1bw day-1) | 0.03 | A5 | - | |
| 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 | Potential thyroid toxicant USEPA - probable human carcinogen Endocrine issues - Binding to sex hormone |
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: 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 |
Prevent generation of dust IMDG Transport Code is usually 9 |
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| CLP classification 2013 | Health: H302 Environment: H400, H410 |
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| EC Risk Classification |
Xn - Harmful: R22 N - Dangerous for the environment: R50, R53 |
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| EC Safety Classification |
S2, S60, S61 | |||
| WHO Classification | III | - | Slightly hazardous | |
| US EPA Classification (formulation) | III | - | Caution - Slightly toxic | |
| UN Number | Usually 3082 | |||
| Waste disposal & packaging |
Packaging Group III (minor danger) | |||
| Language | Name |
| English | resmethrin |
| French | resméthrine |
| German | Resmethrin |
| Danish | resmethrin |
| Italian | resmetrin |
| Spanish | resmetrin |
| Greek | resmethrin |
| Slovenian | resmetrin |
| Polish | resmetryna |
| Swedish | - |
| Hungarian | - |
| Dutch | resmetrine |
Record last updated: Friday 25 May 2018
Contact: aeru@herts.ac.uk