Dichlorprop (Ref: RD 406)
Last updated: 19/01/2023
(Also known as: 2,4-DP)
Dichlorprop is a post-emergence, selective herbicide. 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.
The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.
Environmental fate
Ecotoxicity
Human health
A herbicide for post-emergence control of annual and perennial broad-leaved weeds and some brush species
Canada thistle; Cocklebur; Ragweeds; Pigweed; Shepherd's purse; Stinkweed; Lambsquarter; Goosefoot; Wild mustard
Cereals including wheat, barley; Non-crop situations including right-of-way, commercial and industrial sites
-
Current
1961
Not approved
Expired
No UK approval for use
EC Regulation 1107/2009 (repealing 91/414)
Not approved
Not applicable
Expired
Not applicable
Yes
ATAustria
BEBelgium
BGBulgaria
CYCyprus
CZCzech Republic
DEGermany
DKDenmark
EEEstonia
ELGreece
 
 
 
 
 
 
 
 
 
ESSpain
FIFinland
FRFrance
HRCroatia
HUHungary
IEIreland
ITItaly
LTLithuania
LULuxembourg
 
 
 
 
 
 
 
 
 
LVLatvia
MTMalta
NLNetherlands
PLPoland
PTPortugal
RORomania
SESweden
SISlovenia
SKSlovakia
 
 
 
 
 
 
 
 
 
ISIceland
NONorway
 
 
 
 
 
 
 
 
 
Chiral with S- and R- enantiomers. Substance is racemic.
C₉H₈Cl₂O₃
CC(C(=O)O)OC1=C(C=C(C=C1)Cl)Cl
Clc1cc(Cl)ccc1OC(C(=O)O)C
MZHCENGPTKEIGP-UHFFFAOYSA-N
InChI=1S/C9H8Cl2O3/c1-5(9(12)13)14-8-3-2-6(10)4-7(8)11/h2-5H,1H3,(H,12,13)
Yes
Cambridge Crystallographic Data Centre diagrams
Common Name
Relationship
Link
dichlorprop
-
Herbicide, Plant Growth Regulator
Aryloxyalkanoic acid herbicide; Phenoxypropionic herbicde; Auxin PGR
-
-
Synthetic
Selective, systemic, absorbed through leaves and translocates to roots. Synthetic auxin causing stem and leaf malformations leading to death.
120-36-5
7547-66-2
204-390-5
84
031401
8427
607-045-00-0
235.06
rac-(2R)-2-(2,4-dichlorophenoxy)propanoic acid
(RS)-2-(2,4-dichlorophenoxy)propionic acid
2-(2,4-dichlorophenoxy)propanoic acid
Potential groundwater contaminant
-
O
4
Not applicable
Not applicable
-
Colourless crystals
Headland Agrochemicals FBC Bayer Universal Crop Protection
Weedone 170 Hedonal DP Hormatox Polyclene Seritox Polymore
Often supplied as an emulsifiable concentrate or as an emulsion.
350
H4 H = The US ARS pesticide properties database. Dataset is no longer available. 4 = Verified data
Moderate
689000
C4 C = AGRITOX dataset. Dataset is no longer available. 4 = Verified data
Ethyl acetate
-
1265000
C4 C = AGRITOX dataset. Dataset is no longer available. 4 = Verified data
Acetone
-
3030
C4 C = AGRITOX dataset. Dataset is no longer available. 4 = Verified data
Hexane
-
61200
C4 C = AGRITOX dataset. Dataset is no longer available. 4 = Verified data
Toluene
-
117
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
-
-
-
-
-
-
-
204
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
(open cup)
-
1.95 X 1002
Calculated
-
2.29
H4 H = The US ARS pesticide properties database. Dataset is no longer available. 4 = Verified data
Low
-
-
-
-
-
-
1.42
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
-
3
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
-
Strong acid
0.01
H4 H = The US ARS pesticide properties database. Dataset is no longer available. 4 = Verified data
Low volatility
8.80 X 10-06
H4 H = The US ARS pesticide properties database. Dataset is no longer available. 4 = Verified data
Non-volatile
-
-
-
-
-
-
-
10
W4 W = French database provided by ARVALIS-Institut du Végétal. Dataset no longer available. 4 = Verified data
Non-persistent
14
Non-persistent
10
Non-persistent
-
-
-
-
-
-
-
-
-
Other sources: DT₅₀ 21-25 days (R3)
-
-
-
-
-
-
-
-
-
-
-
-
Stable
Stable
-
12
Fast
-
-
-
Soil adsorption and mobility
-
Q4 Q = Miscellaneous data from online sources 4 = Verified data
Mobile
74
Other sources: 12.0-170 mL g⁻¹ (R3)
0.77
R4 R = Peer reviewed scientific publications 4 = Verified data
Mobile
41.2
0.87
Kf range 0.67-0.86 mL g⁻¹, Kfoc range 34.4-47.9 mL g⁻¹, 1 /n range 0.86-0.88, Soils=2
-
2.39
Calculated
Transition state
5.07 X 10-02
Calculated
-
-
Low
Calculated
-
Mobile
Calculated
-
6
Q2 Q = Miscellaneous data from online sources 2 = Unverified data of unknown source
Estimated
Low potential
Not available
-
Known groundwater metabolites
None
None
Terrestrial ecotoxicology
825
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
Moderate
-
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
-
> 5
-
-
-
-
504
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Coturnix japonica
Moderate
-
-
-
-
-
-
1000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Moderate
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
16
Moderate
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
> 0.5
Oncorhynchus mykiss
Moderate
-
-
-
> 100
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Daphnia magna
Low
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1100
L2 L = Pesticide manuals and hard copy reference books / other sources 2 = Unverified data of unknown source
Pseudokirchneriella subcapitata
Low
180
Q2 Q = Miscellaneous data from online sources 2 = Unverified data of unknown source
Unknown species
Low
-
-
-
-
-
-
HUMAN HEALTH AND PROTECTION
High (class III)
-
-
825
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
Moderate
1400
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Mouse
-
0.65
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
List II
-
-
Low risk to Europeans as no longer approved for use
Low risk to Europeans as no longer approved for use
EU MRL pesticide database 
-
Non-statutory WHO drinking water guideline 0.1 mg l⁻¹
UK EA QS database 2018
-
-
-
-
-
-
-
Carcinogen
Endocrine disruptor
No data found
A0 A = Chromosome aberration (EFSA database) 0 = No data
; B0 B = DNA damage/repair (EFSA database) 0 = No data
; C0 C = Gene mutation (EFSA database) 0 = No data
; D0 D = Genome mutation (EFSA database) 0 = No data
; E0 E = Unspecified genotoxicity type (miscellaneous data source) 0 = No data
No data found
Reproduction / development effects
Acetyl cholinesterase inhibitor
Neurotoxicant
?Possibly, status not identified
No data found
No data found
Respiratory tract irritant
Skin irritant
Skin sensitiser
No data found
✓Yes, known to cause a problem
No data found
Eye irritant
Phototoxicant
 
✓Yes, known to cause a problem
No data found
 
No further information available
No information available
Health: H302, H312, H315, H318
II (Moderately hazardous)
-
-
dichlorprop
dichlorprop
Dichlorprop
dichlorprop
diclorprop
diclorprop
dichlorprop
dichlorprop
-
dichlorprop
dichloorprop
-
Record last updated:
19/01/2023
Contact:
aeru@herts.ac.uk
Please cite as:
Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal , 22 (4), 1050-1064. DOI: 10.1080/10807039.2015.1133242