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GET ADDITIONAL DATA HERE!

dichlorprop (Ref: RD 406)
** 2,4-DP ** Translations

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

SUMMARY

Dichlorprop is a post-emergence, selective herbicide that does not have regulatory approval for use in the EU. It has a moderate aqueous solubility and is volatile. Its data suggests it is not persistent in soils but may persist in some water systems. It is moderately toxic to. Dichlorprop has a moderate to low toxicity to most aquatic organisms.

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

Description: A herbicide for post-emergence control of annual and perennial broad-leaved weeds and some brush species

Example pests controlled: Canada thistle; Cocklebur; Ragweeds; Pigweed; Shepherd's purse; Stinkweed; Lambsquarter; Goosefoot; Wild mustard

Example applications: Cereals including wheat, barley; Non-crop situations including right-of-way, commercial and industrial sites

Efficacy & activity: -

Availability status: Current

Introduction & key dates: 1961

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) Not applicable
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 Chiral with S- and R- enantiomers
Chemical formula C9H8Cl2O3
Canonical SMILES CC(C(=O)O)OC1=C(C=C(C=C1)Cl)Cl
Isomeric SMILES Clc1cc(Cl)ccc1OC(C(=O)O)C
International Chemical Identifier key (InChIKey) MZHCENGPTKEIGP-UHFFFAOYSA-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)
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
Substance group Aryloxyalkanoic acid
Minimum active substance purity -
Known relevant impurities -
Substance origin Synthetic
Mode of action Selective, systemic, absorbed through leaves and translocates to roots. Synthetic auxin causing stem and leaf malformations leading to death.
CAS RN 120-36-5
Alternative/old CAS RN 7547-66-2
EC number 204-390-5
CIPAC number 84
US EPA chemical code 031401
PubChem CID 8427
Molecular mass (g mol-1) 235.06
PIN (Preferred Identification Name) rac-(2R)-2-(2,4-dichlorophenoxy)propanoic acid
IUPAC name (RS)-2-(2,4-dichlorophenoxy)propionic acid
CAS name 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 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
  • Headland Agrochemicals
  • FBC
  • Bayer
  • Universal Crop Protection
Example products using this active
  • Weedone 170
  • Hedonal DP
  • Hormatox
  • Polyclene
  • Seritox
  • Polymore
UK LERAP status No UK approval for use as a pesticide under EC Regulation 1107/2009
Formulation and application details Often supplied as an emulsifiable concentrate or as an emulsion.


ENVIRONMENTAL FATE

for dichlorprop

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) 350 H4 Moderate
Solubility - In organic solvents at 20oC (mg l-1) 689000 C4 - Ethyl acetate -
1265000 C4 - Acetone -
3030 C4 - Hexane -
61200 C4 - Toluene -
Melting point (oC) 117 L3 -
Boiling point (oC) - - -
Degradation point (oC) - - -
Flashpoint (oC) 204 L3 - (open cup) -
Octanol-water partition coefficient at pH 7, 20oC P 1.95 X 1002 Calculated -
Log P 2.29 H4 Low
Bulk density (g ml-1)/Specific gravity 1.42 L3 -
Dissociation constant (pKa) at 25oC 3 L3 -
Note: Strong acid
Vapour pressure at 20oC (mPa) 0.01 H4 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) 8.80 X 10-06 H4 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 2.73 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 1.17 X 10-01 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 - - -
Surface tension (mN m-1) - - -

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 -
Soil degradation (days) (aerobic) DT50 (typical) 10 W4 Non-persistent
DT50 (lab at 20oC) 14 Y4 Non-persistent
DT50 (field) 10 X3 Non-persistent
DT90 (lab at 20oC) - - -
DT90 (field) - - -
DT50 modelling endpoint - - -
Note Other sources: DT50 21-25 days (R3)
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 Stable K4 -
Note -
Water-sediment DT50 (days) 12 K4 Fast
Water phase only DT50 (days) - - -

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 - Q4 Mobile
Koc 74
Notes and range Other sources: 12.0-170 mL/g (R3)
Freundlich Kf 0.77 R4 Mobile
Kfoc 41.2
1/n 0.87
Notes and range Kf range 0.67-0.86 mL/g, Kfoc range 34.4-47.9 mL/g, 1/n range 0.86-0.88, Soils=2
pH sensitivity -

Key metabolites:
Metabolite Formation medium Estimated maximum occurrence fraction 1107/2009 relevancy Click here for further information on 1107/2009 relevancy
2,4-dichlorophenol Soil   -   Minor fraction; Relevant


ECOTOXICOLOGY

for dichlorprop

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) 6 Q2 Estimated Low potential
CT50 (days) Not available -
Mammals - Acute oral LD50 (mg kg-1) 825 L3 Rat Moderate
Mammals - Short term dietary NOEL (mg kg-1) - L3 Rat -
(ppm diet) > 5 -
Birds - Acute LD50 (mg kg-1) 504 L3 Coturnix japonica Moderate
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) > 0.5 J4 Oncorhynchus mykiss Moderate
Fish - Chronic 21 day NOEC (mg l-1) - - -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) > 100 L3 Daphnia magna Low
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) 1100 L2 Pseudokirchneriella subcapitata Low
Algae - Chronic 96 hour NOEC, growth (mg l-1) 180 Q2 Unknown species Low
Honeybees (Apis spp.) Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) 16 K4 Moderate
Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) - - -
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) 1000 L3 Moderate
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 dichlorprop

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) 825 L3 Rat Moderate
Mammals - Dermal LD50 (mg kg-1 body weight) > 1400 L3 Mouse -
Mammals - Inhalation LC50 (mg l-1) 0.65 L3 Rat -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) - - -
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 List II - -
Exposure Routes Public Low risk to Europeans as no longer approved for use
Occupational Low risk to Europeans as no longer approved for use
European MRLs Click here for the EU MRL pesticide database
Drinking Water Standards Non-statutory WHO drinking water guideline 0.1 mg/L UK EA QS database, 2018 -
Drinking Water MAC (μg l-1) - - -

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

-

A0; B0; C0; D0; E0

-

-

-

Respiratory tract irritant Skin irritant Skin sensitiser Eye irritant Phototoxicant

-

-

-

General human health issues No further information available
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 No information available
CLP classification 2013 Health: H302, H312, H315, H318
EC Risk Classification Click here to view information omn the EU risk phrases Xn - Harmful: R21/22, R41
Xi - Irritant: R38
EC Safety Classification Click here to view information omn the EU safety phrases S2, S22, S36/37
WHO Classification II - Moderately hazardous
UN Number -
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for dichlorprop

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

Record last updated: Tuesday 22 May 2018
Contact: aeru@herts.ac.uk