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GET ADDITIONAL DATA HERE!

mepiquat chloride (Ref: BAS 083W)
** Translations

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

GENERAL INFORMATION Click here for an explantaion of the general chemical status information
for mepiquat chloride

Description: A plant growth regulator used to reduce vegetative growth including sprout suppression in onions, leeks and garlic

Example pests controlled: Growth; Strength

Example applications: Cereals including wheat, oats, barley, rye, triticale; Cotton; Onions; Leeks; Garlic; Grass

Efficacy & activity: Efficacy demonsrated from extensive global use and field research

Availability status: Current

Introduction & key dates: 1980, USA

EC Regulation 1107/2009 (repealing 91/414):
Status Approved
Dossier rapporteur/co-rapporteur Finland/Estonia
Date inclusion expires 28/02/2020
EU Candidate for substitution (CfS) No
Listed in EU database Yes

Approved for use () or known to be used () in the following European countries: Click to access a note on the approvals information on this site

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

Also used in: Australia

Chemical structure: Click here for further information on the general chemical status information used on this site
Isomerism None
Chemical formula C7H16ClN
Canonical SMILES C[N+]1(CCCCC1)C.[Cl-]
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) VHOVSQVSAAQANU-UHFFFAOYSA-M
International Chemical Identifier (InChI) InChI=1S/C7H16N.ClH/c1-8(2)6-4-3-5-7-8;/h3-7H2,1-2H3;1H/q+1;/p-1
2D structure diagram/image available? Yes

General status: Click here for further information on the general chemical status information used on this site
Pesticide type Plant growth regulator
Substance group Quarternary ammonium compound
Minimum active substance purity 575 g/kg
Known relevant impurities EU dossier - None declared
Substance origin Synthetic
Mode of action Inhibits biosynthesis of gibberellic acid
CAS RN 24307-26-4
EC number 246-147-6
CIPAC number 440.302
US EPA chemical code 109101
PubChem CID 62781
Molecular mass (g mol-1) 149.66
PIN (Preferred Identification Name) -
IUPAC name 1,1-dimethylpiperidinium chloride
CAS name 1,1-dimethylpiperidinium chloride
Other status information -
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) None
Herbicide Resistance Classification (WSSA) -
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not applicable
Examples of recorded resistance -
Physical state Colourless crystals
Related substances & organisms

Formulations:
Property Click here for information on the general product and branding information used on this site Value
Example manufacturers & suppliers of products using this active now or historically
  • BASF
  • King Tech Corp
  • Makhteshim Agan
Example products using this active
  • Stronghold
  • Terpal
  • Chamatkar
  • Pix
UK LERAP status None
Formulation and application details Often supplied as an aqueous solution.


ENVIRONMENTAL FATE

for mepiquat chloride

Property Click here for information on the parameters used to describe environmental fate on this site Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with fate data Interpretation Click here for information on the way in which we interpret environmental fate data
Solubility - In water at 20oC (mg l-1) 747000 A5 High
Solubility - In organic solvents at 20oC (mg l-1) 487000 A5 - Methanol -
10 A5 - Toluene -
20 A5 - Acetone -
10 A5 - n-Heptane -
Melting point (oC) Decomposes before melting A5 -
Boiling point (oC) Decomposes before boiling A5 -
Degradation point (oC) 320 A5 -
Flashpoint (oC) Not expected to self ignite; Not flammable A5 -
Octanol-water partition coefficient at pH 7, 20oC P 2.82 X 10-04 Calculated -
Log P -3.55 A5 Low
Bulk density (g ml-1)/Specific gravity 1.16 A5 -
Dissociation constant (pKa) at 25oC Not applicable A5 -
Note: Completely dissociates in aqueous solution
Vapour pressure at 20oC (mPa) 1.00 X 10-05 A5 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) 2.99 X 10-12 A5 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 1.18 Calculated Low leachability
SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate Click here for a note on the limitations of the SCI-GROW index Value 1.98 X 10-02 Calculated -
Note -
Potential for particle bound transport index Click here for a note on the limitations of the potential for particle bound transport index - Calculated Low
Maximum UV-vis absorption L mol-1 cm-1 No significant absorption between 200-750nm at pH 1, 6 or 13 A5 -
Surface tension (mN m-1) 47.4 A5 -

Degradation:
Property Click here for information on the parameters used to describe substance degradation Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with degradation data Interpretation Click here for information on the way in which we interpret substance degradation data
General biodegradability Not readily biodegradable
Soil degradation (days) (aerobic) DT50 (typical) 13.3 A5 Non-persistent
DT50 (lab at 20oC) 13.3 A5 Non-persistent
DT50 (field) - - -
DT90 (lab at 20oC) 85.1 A5 -
DT90 (field) - - -
DT50 modelling endpoint - - -
Note EU 2018 dossier lab studies DT50 (actual) range 3.55-74.5 days, DT90 (actual) range 29.8-247.5 days, Soils=7
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 Stable A5 -
Note -
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value Stable A5 -
Note Stable pH 3 to pH 9
Water-sediment DT50 (days) 32.5 A5 Moderately fast
Water phase only DT50 (days) 7.5 A5 Moderately fast

Soil adsorption and mobility:
Property Click here for information on the parameters used to describe substance adsorption and mobility Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with adsorption and mobility data Interpretation Click here for information on the way in which we interpret substance adsorption and mobility
Linear Kd - - -
Koc -
Notes and range -
Freundlich Kf 9.03 A5 Slightly mobile
Kfoc 890
1/n 0.968
Notes and range Kf range 0.22-25.0, Kfoc range 67-4833 mL/g, 1/n range 0.914-1.634, Soils=12
pH sensitivity No

Other known metabolites:
Metabolite name and reference Aliases Formation medium / Rate Estimated maximum occurrence fraction Metabolising enzymes
4-hydroxymepiquat chloride - Rat; Animal - -
Agrobacterium radiobacter strain K84
(Ref: )
Note: A5
- Animal - -
methyl piperidine - Animal - -


ECOTOXICOLOGY

for mepiquat chloride

Property Click here for information on the parameters used to describe substance ecotoxicology Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with ecotoxicology data Interpretation Click here for information on the way in which we interpret substance ecotoxicology
Bio-concentration factor BCF (l kg-1) 2 F4 Whole fish Low potential
CT50 (days) Not available -
Mammals - Acute oral LD50 (mg kg-1) 200 A5 Rat Moderate
Mammals - Short term dietary NOEL (mg kg-1) - L1 Rat -
(ppm diet) 3000 -
Birds - Acute LD50 (mg kg-1) > 2000 A5 Colinus virginianus Low
Birds - Short term dietary (LC50/LD50) > 1326 mg kg bw-1 day-1 A5 Colinus virginianus -
Fish - Acute 96 hour LC50 (mg l-1) > 100 A5 Oncorhynchus mykiss Low
Fish - Chronic 21 day NOEC (mg l-1) 100 A5 Oncorhynchus mykiss, 28 day Low
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 68.5 A5 Daphnia magna Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) 12.5 A5 Daphnia magna Low
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) 136.0 F3 Americamysis bahia Low
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) 2.6 A5 Lemna gibba Moderate
Non-target plants - - -
- - -
Algae - Acute 72 hour EC50, growth (mg l-1) 14.4 A5 Anabaena flos-aquae 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) > 100 A5 Apis mellifera Low
Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) > 107.4 A5 Apis mellifera Low
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) 319.5 A5 Eisenia foetida Moderate
Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1) 31.25 A5 Eisenia foetida Moderate
Other soil macro-organisms - e.g. Collembola LR50 / EC50 / NOEC / % Effect - - -
Other arthropod (1) LR50 g ha-1 1366 48 hour
A5 Aphidius rhopalosiphi
-
% Effect - - -
Other arthropod (2) LR50 g ha-1 1530 >, 7 day
A5 Typhlodromus pyri
-
% Effect - - -
Soil micro-organisms Nitrogen mineralisation: No significant adverse effect
Carbon mineralisation: No significant adverse effect
A5
Dose: 8.14 mg kg-1 soil
-
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


HUMAN HEALTH AND PROTECTION

for mepiquat chloride

General:
Property Click here for information on the parameters used to describe human health and protection issues Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with human health and protection data Interpretation Click here for information on the way in which we interpret human health and protection data
Threshold of Toxicological Concern (Cramer Class) Click here for a note on the limitations of the Cramer class High (class III) - -
Mammals - Acute oral LD50 (mg kg-1) 200 A5 Rat Moderate
Mammals - Dermal LD50 (mg kg-1 body weight) > 2000 A5 Rat -
Mammals - Inhalation LC50 (mg l-1) > 4.89 A5 Rat -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.065 A5 Rat, SF=200 -
ARfD - Acute Reference Dose (mg kg-1bw day-1) 0.3 A5 Rat, SF=100 -
AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw day-1) 0.225 A5 Rat, SF=100 -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) 0.075 A5 Rat, SF=500 -
Dermal penetration studies (%) 25-75 A5 concentration dependant -
Dangerous Substances Directive 76/464 - - -
Exposure Routes Public Minimal risk from dietary exposure
Risk assessment indicates ARfD would not normally be exceded
Occupational Risk of exposure acceptable under label recommendations for use for personal protection clothing and equipment
European MRLs Click here for the EU MRL pesticide database
Drinking Water Standards - - -
Drinking Water MAC (μg l-1) 0.1 EU Dir 89/778/EC limit; Calc MAC=900 μg l-1; A5 -

Health issues:
Carcinogen Genotoxic Endocrine disrupter Reproduction / development effects Cholinesterase inhibitor Neurotoxicant

A3; B3; C3; D0; E3

-

Respiratory tract irritant Skin irritant Skin sensitiser Eye irritant Phototoxicant

-

-

General human health issues Moderately toxic
May effect hematological parameters
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

Handling issues:
Property Click here for information on the parameters used to describe substance handling issues Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with data on handling issues Interpretation Click here for information on the way in which we interpret data on handling issues
General Click here for a description of the International Maritime Dangerous Goods (IMDG) codes Prevent generation of mists
Not explosive or oxidising
CLP classification 2013 Health: H371, H351, H301, H332
Environment: H412
EC Risk Classification Click here to view information omn the EU risk phrases Xn - Harmful: R22
N - Dangerous for the environment: R52, R53
EC Safety Classification Click here to view information omn the EU safety phrases S2, S61
WHO Classification II - Moderately hazardous
UN Number -
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for mepiquat chloride

Language Name
English mepiquat chloride
French mepiquat-chlorure
German Mepiquat chlorid
Danish mepiquat-chlorid
Italian mepiquat cloruro
Spanish cloruro de mepicuat
Greek -
Slovenian mepikvat klorid
Polish chlorek mepikwatu
Swedish mepikvatklorid
Hungarian -
Dutch -

Record last updated: Tuesday 25 June 2019
Contact: aeru@herts.ac.uk