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acetamiprid (Ref: NI 35)
** ethanimidamide ** Translations

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


Acetamiprid is an insecticide that is currently approved for EU use. It is highly soluble in water and is non-volatile. Based on its chemical properties it would not be expected to leach to groundwater. It is not persistence in soil systems but may be very persistent in aquatic systems under certain conditions. It has a moderate mammalian toxicity and it has a high potential for bioaccumulation. It is a recognised irritant. It is highly toxic to birds and earthworms and moderately toxic to most aquatic organisms.

for acetamiprid

Description: A pyridylmethylamine insecticide used for the control of Hemiptera especially aphids.

Introduction: 1995, Japan

EC Regulation 1107/2009 (repealing 91/414):
Status Approved
Dossier rapporteur/co-rapporteur Greece
Date inclusion expires 31/12/2014

Approved for use () or known to be used () in the following European countries:




























Also registered in: USA

General status:
Pesticide type Insecticide
Substance group Neonicotinoid
Substance origin Synthetic
Mode of action Systemic with translaminar activity having both contact and stomach action. Acetylcholine receptor (nAChR) agonist.
CAS RN 135410-20-7
EC number -
CIPAC number 649
US EPA chemical code 099050
Chiral molecule No
Chemical formula C10H11ClN4
SMILES Clc1ncc(cc1)CN(\C(=N\C#N)C)C
International Chemical Identifier key (InChIKey) WCXDHFDTOYPNIE-RIYZIHGNSA-N
International Chemical Identifier (InChI) InChI=1S/C10H11ClN4/c1-8(14-7-12)15(2)6-9-3-4-10(11)13-5-9/h3-5H,6H2,1-2H3/b14-8+
Structure diagram/image available? Yes
Molecular mass (g mol-1) 222.67
PIN (Preferred Identification Name) (1E)-N-[(6-chloropyridin-3-yl)methyl]-N'-cyano-N-methylethanimidamide
IUPAC name (E)-N1-[(6-chloro-3-pyridyl)methyl]-N2-cyano-N1-methylacetamidine
CAS name (1E)-N-[(6-chloro-3-pyridinyl)methyl]-N'-cyano-N-methylethanimidamide
Other status information -
Herbicide Resistance Classification (HRAC) Not applicable
Herbicide Resistance Classification (WSSA) Not applicable
Insecticide Resistance Classification (IRAC) 4A
Fungicide Resistance Classification (FRAC) Not applicable
Physical state Colourless crystals
Related substances & organisms -

Property Value
Example manufacturers & suppliers of products using this active
  • AgroCare
  • Certis
Example products using this active
  • Acetamiprid WP
  • Gazelle
  • Insyst
  • Beticol
UK LERAP status LERAP Category B, Broadcast Air Assisted LERAP
Formulation and application details Spray application.


for acetamiprid

Property Value Source/Quality Score/Other Information Interpretation
Solubility - In water at 20oC (mg l-1) 2950 A5 High
Solubility - In organic solvents at 20oC (mg l-1) 6.54 A5 - Hexane -
200000 A5 - Chloroform -
200000 A5 - Dichloromethane -
200000 A5 - Acetone -
Melting point (oC) 98.9 L3 -
Boiling point (oC) Decomposes before boiling A5 -
Degradation point (oC) - - -
Flashpoint (oC) Not expected to self ignite; Not highly flammable A5 -
Octanol-water partition coefficient at pH 7, 20oC P 6.31 X 1000 Calculated -
Log P 0.8 A5 Low
Bulk density (g ml-1)/Specific gravity 1.33 A5 -
Dissociation constant (pKa) at 25oC 0.7 A5 -
Note: Strong acid
Vapour pressure at 25oC (mPa) 1.73 X 10-04 A5 Non-volatile
Henry's law constant at 25oC (Pa m3 mol-1) 5.30 X 10-08 A5 Non-volatile
Henry's law constant at 20oC (dimensionless) 5.36 X 10-12 Calculated Non-volatile
GUS leaching potential index 0.94 Calculated Low leachability
SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate Value 1.80 X 10-03 Calculated -
Note -
Potential for particle bound transport index - Calculated Low
Maximum UV-vis absorption L mol-1 cm-1 Neutral solution: 247nm = 19700, 217nm = 12100 A5 -
Surface tension (mN m-1) - - -

Property Value Source/Quality Score/Other Information Interpretation
Soil degradation (days) (aerobic) DT50 (typical) 3 A5 Non-persistent
DT50 (lab at 20oC) 2.6 A5 Non-persistent
DT50 (field) 3 A5 Non-persistent
DT90 (lab at 20oC) 20.9 A5 -
DT90 (field) 20.2 A5 -
Note EU dossier Lab studies DT50 range 0.8-5.4 days, DT90 range 2.8-67.3 days, field studies DT50 range 0.4 days (Italy) to 5.4 days (UK), DT90 range 18.4-31.4 days; Other sources: 2-20 days
Aqueous photolysis DT50 (days) at pH 7 Value 34 A5 Stable
Note -
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value Stable A5 Very persistent
Note Stable pH 4 to pH 7 at temps 22-45 deg C. Degradation does occur at higher pHs and elevated temps e.g. DT50 420 days at pH 9, 25 degC, 13 days pH9, 45 degC
Water-sediment DT50 (days) - - -
Water phase only DT50 (days) 4.7 A5 Moderately fast

Soil adsorption and mobility:
Property Value Source/Quality Score/Other Information Interpretation
Linear Kd - US3 Moderately mobile
Koc 200
Notes and range -
Freundlich Kf 1.58 A5 Moderately mobile
Kfoc 107
1/n -
Notes and range EU dossier mean of 5 soils. Calcareous Kf= 1.12
pH sensitivity No

Key metabolites:
Metabolite Formation medium Estimated maximum occurrence fraction 91/414 relevancy
N-methyl(6-chloro-3-pyridyl)methylamine (Ref: AE 0653700) Soil   0.362   Major fraction, Not relevant

Other known metabolites:
Metabolite name and reference Aliases Formation medium / Rate Estimated maximum occurrence fraction Metabolising enzymes
(Ref: IB-1-1) - - - -
6-chloro-nicotinic acid
(Ref: IC-0)
Note: EC50 Daphnia magna = 95mg l-1; Earthworms EC50=1000mg kg-1
- a = Soil; b = Plant a=0.102 -
6-chloro-pyridilmethyl alcohol
(Ref: IM-0)
Note: Toxic
- Animal; Plant - -
(Ref: IM-1-2)
Note: C10H13ClN4O; Mol weight = 240.69; EC50 Daphnia magna = 100mg l-1; Earthworms EC50=1000mg kg-1
- Soil 0.119 -
(Ref: IM-1-3)
Note: Toxic
- Animal; Water (Hydrolysis) - -
(Ref: IM-1-5)
Note: Forms on calcareous soils; C9H12ClN3; Mol Wieght = 197.67
- a = Soil; b = Rat a=0.134 -
N-demthyl acetamidprid
(Ref: IM-2-1)
Note: C9H9ClN4; Mol Weight = 208.65
- Plant - -
(Ref: IM-2-3)
Note: Toxic
- Animal - -
(Ref: IS-1-1) - - - -
(Ref: IS-2-1) - - - -


for acetamiprid

Property Value Source/Quality Score/Other Information Interpretation
Bio-concentration factor BCF Low risk A5 Based on LogP < 3 High potential
CT50 (days) - -
Bioaccumulation potential - Calculated Low
Mammals - Acute oral LD50 (mg kg-1) 213 A5 Rat Moderate
Mammals - Short term dietary NOEL (mg kg-1) 15 A5 Rat High
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) 98 A5 Anas platyrhynchos High
Birds - Short term dietary (LC50/LD50) > 741 mg kg bw-1 day-1 A5 Colinus virginianus -
Fish - Acute 96 hour LC50 (mg l-1) > 100 A5 Salmonidae Moderate
Fish - Chronic 21 day NOEC (mg l-1) 19.2 A5 Pimephales promelas, 32 day -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 49.8 A5 Daphnia magna Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) 5 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) 0.005 A5 Chironomus riparius High
Sediment dwelling organisms - Chronic 28 day NOEC, sediment (mg kg-1) - - -
Aquatic plants - Acute 7 day EC50, biomass (mg l-1) 1 A5 Lemna gibba Moderate
Algae - Acute 72 hour EC50, growth (mg l-1) > 98.3 A4 Scenedemus subspicatus, 72 hour Low
Algae - Chronic 96 hour NOEC, growth (mg l-1) - - -
Honeybees Contact acute 48 hour LD50 (μg bee-1) 8.09 A5 Moderate
Oral acute 48 hour LD50 (μg bee-1) 14.53 A5 Moderate
Unknown mode acute 48 hour LD50 (μg bee-1) - - -
Earthworms - Acute 14 day LC50 (mg kg-1) 9 A5 Eisenia foetida High
Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1) 1.26 A5 Eisenia foetida Moderate
Other soil macro-organisms - e.g. Collembola LR50 / EC50 / NOEC / % Effect - - -
Other arthropod (1) LR50 g ha-1 - - -
% Effect 100 Mortality
Dose: 0.2-0.4 kg ha-1
A5 Aphidius rhopalosiphi, adult
Other arthropod (2) LR50 g ha-1 - - -
% Effect 100 Mortality
Dose: 0.09-0.18 kg ha-1
A5 Typhlodromus pyri, protonymph
Soil micro-organisms Nitrogen mineralisation: No significant adverse effect
Carbon mineralisation: No significant adverse effect
Dose: 0.2 kg ha-1
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


for acetamiprid

Property Value Source/Quality Score/Other Information Interpretation
Mammals - Acute oral LD50 (mg kg-1) 213 A5 Rat Moderate
Mammals - Dermal LD50 (mg kg-1 body weight) > 2000 A5 Rat -
Mammals - Inhalation LC50 (mg l-1) 1.15 A5 Rat -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.07 A5 -
ARfD - Acute Reference Dose (mg kg-1bw day-1) 0.1 A5 Rat, SF=100 -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) 0.124 A5 Rat, 90 day, SF=100 -
Dermal penetration studies (%) 15.9-33.7 A5 concentration dependant -
Dangerous Substances Directive 76/464 - - -
Exposure Limits - - -
Exposure Routes Public Minimal risk from dietary exposure
Source: US EPA/EU
Occupational Occupational exposure may occur through inhalation and dermal contact. Operator health should be monitored
Examples of European MRLs (mg kg-1) Value Citrus: 1.0; Cherries: 0.2; Curcubits with edible peel: 0.3; Pomes, apricots, peaches, tea and hops: 0.1; Plums and cotton seed: 0.02; Cereals, berries, soft fruit, other fruit, vegetables and treenuts: 0.01
Note Provision limits set by EU Directive 2007/11/EC. February 2007.
For the EU pesticides database click here
Drinking Water MAC (μg l-1) - - -

Health issues:
Carcinogen Mutagen Endocrine disrupter Reproduction / development effects Cholinesterase inhibitor Neurotoxicant Respiratory tract irritant Skin irritant Eye irritant




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

Handling issues:
Property Value Source/Quality Score/Other Information Interpretation
General Combustable
Not explosive or oxidising
IMDG Transport Code is usually 6.1
CLP classification 2013 -
EC Risk Classification Xn - Harmful: R22
N - Dangerous for the environment: R52/53
EC Safety Classification S2, S46, S61
WHO Classification II - Moderately hazardous
US EPA Classification (formulation) No consensus across products or no products available - -
UN Number Usually 2588
Waste disposal & packaging Packaging Group III (minor danger)


for acetamiprid

Language Name
English acetamiprid
French acetamipride
German Acetamiprid
Danish acetamiprid
Italian acetamiprid
Spanish acetamiprid
Greek -
Slovenian acetamiprid
Polish acetamipryd
Swedish acetamiprid
Hungarian acetamiprid
Dutch acetamiprid

Record last updated: Saturday 10 January 2015