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GET ADDITIONAL DATA HERE!

dichlorprop-P (Ref: BAS 044H)
** AHM867 ** 2,4-DP-P ** CA3121 ** Translations

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

SUMMARY

A commonly used herbicide approved for use in most of the developed world. It is highly soluble in water, has a low volatility and is quite mobile. It is not usually persistent in soil or sediment systems. It is not expected to bioaccumulate, has a moderate mammalian oral toxicity and may ne a skin and eye irritant. It is moderately toxic to mammals, birds and aquatic plants but less so to fish, aquatic invertebrates, bees and earthworms.

GENERAL INFORMATION Click here for an explantaion of the general chemical status information
for dichlorprop-P

Description: A post-emergence herbicide particularly effective for brush and broad-leaved weed control. Also used as plant growth regulator for increasing fruit size on citrus

Example pests controlled: Black bindweed; Hawthorne; Wild cherry; Wild raspberry; Horsetail; Teasel; Spotted ladysthumb; Smartweed; Canada thistle; Goosefoot; Stink weed; Cocklebur; Docks; Kochia

Example applications: Cereals including wheat, barley, oats, triticale, rye; Non-cropped land; Fruit especially citrus (growth), apple & pear orchards (weed control)

Efficacy & activity: Dichlorprop-P is a long established and proven herbicide.

Availability status: Current

Introduction & key dates: 1987

EC Regulation 1107/2009 (repealing 91/414):
Status Approved
Dossier rapporteur/co-rapporteur Ireland/Poland
Date inclusion expires 30/04/2020
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

Chemical structure: Click here for further information on the general chemical status information used on this site
Isomerism The R-enantiomer of the chiral dichlorprop molecule
Chemical formula C9H8Cl2O3
Canonical SMILES CC(C(=O)O)OC1=C(C=C(C=C1)Cl)Cl
Isomeric SMILES C[C@H](C(=O)O)OC1=C(C=C(C=C1)Cl)Cl
International Chemical Identifier key (InChIKey) MZHCENGPTKEIGP-RXMQYKEDSA-N
International Chemical Identifier (InChI) InChI=1S/C9H8Cl2O3/c1-5(9(12)13)14-8-3-2-6(10)4-7(8)11/h2-5H,1H3,(H,12,13)/t5-/m1/s1
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 Herbicide, Plant growth regulator
Substance group Aryloxyalkanoic acid
Minimum active substance purity 920 g/kg
Known relevant impurities EU dossier - 2,4-dichlorophenol < 5g/kg; Other phenoxy acids
Substance origin Synthetic
Mode of action Selective, systemic, absorbed by leaves and translocates to roots. Synthetic auxin causing stem and leaf malformations leading to death.
CAS RN 15165-67-0
EC number 403-980-1
CIPAC number 476
US EPA chemical code 031402
PubChem CID 119435
Molecular mass (g mol-1) 235.06
PIN (Preferred Identification Name) (2R)-2-(2,4-dichlorophenoxy)propanoic acid
IUPAC name (R)-2-(2,4-dichlorophenoxy)propionic acid
CAS name (2R)-2-(2,4-dichlorophenoxy)propanoic acid
Other status information Potential groundwater contaminant
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) O
Herbicide Resistance Classification (WSSA) 4
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not applicable
Examples of recorded resistance -
Physical state White crystalline solid
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
  • Headland
  • Scotts
  • Nufarm
Example products using this active
  • Link
  • Optica
  • Duplosan DP
  • Corasil
UK LERAP status None
Formulation and application details Often supplied as a soluble concentrate which is mixed with water and applied as a spray.


ENVIRONMENTAL FATE

for dichlorprop-P

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) 672 A5 High
Solubility - In organic solvents at 20oC (mg l-1) 1679000 A5 - Acetone -
697000 A5 - Ethyl acetate -
1631000 A5 - Methanol -
2900 A5 - n-Heptane -
Melting point (oC) 122.1 A5 -
Boiling point (oC) Decomposes before boiling A5 -
Degradation point (oC) 222 A5 -
Flashpoint (oC) Not expected to self ignite; Not highly flammable A5 -
Octanol-water partition coefficient at pH 7, 20oC P 4.68 X 1000 Calculated -
Log P 0.67 A5 Low
Bulk density (g ml-1)/Specific gravity 1.42 A5 -
Dissociation constant (pKa) at 25oC 3.5 A5 -
Note: Weak acid
Vapour pressure at 20oC (mPa) 0.056 A5 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) 5.60 X 10-05 A5 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 2.64 Calculated Transition state
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 8.71 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 205nm = 28000, 218nm = 7600, 230nm = 8900, 252nm = 2200, 285nm = 1900, 292nm = 1700 (shoulder) A5 -
Surface tension (mN m-1) 60.5 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 Readily biodegradable
Soil degradation (days) (aerobic) DT50 (typical) 12 A5 Non-persistent
DT50 (lab at 20oC) 12 A5 Non-persistent
DT50 (field) - - -
DT90 (lab at 20oC) 69.6 A5 -
DT90 (field) - - -
DT50 modelling endpoint 54.6 A5 Reasonable worse case -
Note EU 2017 dossier lab studies DT50 range 6.6-19.5 days, DT90 range 23.8-181 days, Soils=5
Dissipation rate RL50 on plant matrix Value - - -
Note -
Dissipation rate RL50 on and in plant matrix Value 2.2 R3 -
Note Wheat, whole plant, n=1
Aqueous photolysis DT50 (days) at pH 7 Value 3.2 A5 Moderately fast
Note Natural light, 30DegN,
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value Stable K4 -
Note Stable pH 5 to pH 9
Water-sediment DT50 (days) 27 A5 Fast
Water phase only DT50 (days) 14 A5 Slow

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 - A4 Mobile
Koc 44
Notes and range EU 2002 dossier range 12.9-83.7 mL/g
Freundlich Kf 0.54 A5 Mobile
Kfoc 36.0
1/n 0.80
Notes and range EU 2017 dossier Kf range 0.105-1.68 mL/g, Kfoc range 12.9-81.5 mL/g, 1/n range 0.65-0.91, Soils=11
pH sensitivity No

Key metabolites:
Metabolite Formation medium Estimated maximum occurrence fraction 1107/2009 relevancy Click here for further information on 1107/2009 relevancy
2,4-dichlorophenol This metabolite may cause environmental pollution, click here for further information Soil (photolysis)   0.236   Major fraction; relevant
2,4-dichloroanisole Soil   0.042   Minor fraction, Relevant

Other known metabolites:
Metabolite name and reference Aliases Formation medium / Rate Estimated maximum occurrence fraction Metabolising enzymes
dichlorprop-P-methyl ester dichlorprop-P metabolite 11 Plant - -
- dichlorprop-OH Plant - -


ECOTOXICOLOGY

for dichlorprop-P

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) Low risk A5 Based on LogP < 3 Low potential
CT50 (days) - -
Mammals - Acute oral LD50 (mg kg-1) 567 A5 Rat Moderate
Mammals - Short term dietary NOEL (mg kg-1) 152 A4 Rat Moderate
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) 250 A5 Colinus virginianus Moderate
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) > 109 A5 Oncorhynchus mykiss Low
Fish - Chronic 21 day NOEC (mg l-1) > 100 A5 Oncorhynchus mykiss Low
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) > 100 A5 Daphnia magna Low
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) > 100 A5 Daphnia magna Low
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) 4.1 A5 Lemna gibba Moderate
Non-target plants - - -
- - -
Algae - Acute 72 hour EC50, growth (mg l-1) 67 A5 Raphidocelis subcapitata Low
Algae - Chronic 96 hour NOEC, growth (mg l-1) >= 11 A5 Skeletonema costatum Low
Honeybees (Apis spp.) Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) > 200 A5 Apis mellifera Low
Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) > 200 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) > 500 A5 Eisenia foetida, corr Moderate
Earthworms - Chronic NOEC, reproduction (mg kg-1) 309 A5 Eisenia foetida, corr Low
Other soil macro-organisms Acute LC50 (mg kg-1) - - -
Chronic NOEC (mg kg-1) 1.25 A5 Folsomia candida, corr -
Other arthropod (1) LR50 g ha-1 - - -
% Effect 97 Mortality
Dose: 1.5 kg ha-1
A5 Aphidius rhopalosiphi, juvenile
-
Other arthropod (2) LR50 g ha-1 - - -
% Effect 33
18
Mortality
Fecundity
Dose: 1.5 kg ha-1
A5 Typhlodromus pyri, adult/juvenile
-
Soil micro-organisms Nitrogen mineralisation: No significant adverse effect [Dose: 7.5 kg ha-1]
Carbon mineralisation: No significant adverse effect [Dose: 1.5 kg ha-1]
A5 -
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


HUMAN HEALTH AND PROTECTION

for dichlorprop-P

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) 567 A5 Rat Moderate
Mammals - Dermal LD50 (mg kg-1 body weight) > 4000 A5 Rat -
Mammals - Inhalation LC50 (mg l-1) > 7.4 A5 Rat, 4hr -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.06 A5 Mouse, SF=100 -
ARfD - Acute Reference Dose (mg kg-1bw day-1) 0.5 A5 Rabbit, SF=100 -
AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw day-1) - - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) 0.35 A5 Rat, 90 day, SF=100 -
Dermal penetration studies (%) 19-45 A5 concentration dependent -
Dangerous Substances Directive 76/464 - - -
Exposure Routes Public Negligible risk to bystanders and residents
Occupational PPE/PPC recommened to reduce exposure risk
European MRLs Click here for the EU MRL pesticide database
Drinking Water Standards - - -
Drinking Water MAC (μg l-1) - - -

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 Highly toxic
Potential kidney, liver & blood toxicant
May cause severe eye damage
May trigger allergic reactions
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 Not explosive or oxidising
IMDG Transport Code is usually 3
CLP classification 2013 Health: H302, H315, H317, H318
EC Risk Classification Click here to view information omn the EU risk phrases Xn - Harmful: R22, R41, R43
Xi - Irritant: R38
EC Safety Classification Click here to view information omn the EU safety phrases S2, S24, S26, S37/39
WHO Classification NL - Not listed
UN Number Usually 1648
Waste disposal & packaging Click here for a description of UN packaging marks Packaging Group II (medium danger)


TRANSLATIONS

for dichlorprop-P

Language Name
English dichlorprop-P
French dichlorprop-P
German Dichlorprop-P
Danish dichlorprop-P
Italian diclorprop-P
Spanish diclorprop-P
Greek dichlorprop-P
Slovenian diklorprop-P
Polish dichlorprop-P
Swedish diklorprop-P
Hungarian dichlorprop-P
Dutch dichloorprop-P

Record last updated: Monday 11 November 2019
Contact: aeru@herts.ac.uk