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dalapon-sodium
** dalapon ** proprop ** DPA ** Translations

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

SUMMARY

Dalapon sodium is a selective herbicide that is not approved for use in the EU. It is highly soluble in water and volatile. Based on its chemical properties it has a tendency to leach to groundwater. Data suggests it is moderately persistent in soil systems and can be persistent in some water systems. It is relatively non-toxic to mammals and has a low potential for bioaccumulation. Dalapon sodium is a recognised irritant. It has a moderate toxicity to most aquatic organisms and honeybees but is less harmful to birds and earthworms.

GENERAL INFORMATION Click here for an explantaion of the general chemical status information
for dalapon-sodium

Description: A herbicide used to control annual and perennial grasses including couch

Example pests controlled: Bluegrass; Crabgrass; Quackgrass; Bermudagrass Johnsssongrass; Cattails; Rushes; Barnyardgrass; Couch

Example applications: Cotton; Fruit including currants, plums, apricots, cherries, citrus; Potatoes; Sugarcane; Carrots; Alfalfa; Asparagus; Flax; Lucerne; Non-crop situations including domestic houses, commerical and industrial sites

Efficacy & activity: -

Availability status: Current

Introduction & key dates: 1954, first year of public use

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 -
Chemical formula C3H3Cl2NaO2
Canonical SMILES CC(C(=O)[O-])(Cl)Cl.[Na+]
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) PDEFQWNXOUGDJR-UHFFFAOYSA-M
International Chemical Identifier (InChI) InChI=1S/C3H4Cl2O2.Na/c1-3(4,5)2(6)7;/h1H3,(H,6,7);/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 Herbicide
Substance group Halogenated aliphatic compound
Minimum active substance purity -
Known relevant impurities -
Substance origin Synthetic
Mode of action Selective, systemic absorbed through leaves and roots. Inhibition of lipid synthesis.
CAS RN 127-20-8
EC number 204-828-5
CIPAC number 52
US EPA chemical code 028902
PubChem CID 517058
Molecular mass (g mol-1) 164.95
PIN (Preferred Identification Name) sodium 2,2-dichloropropanoate
IUPAC name sodium 2,2-dichloropropionate
CAS name sodium 2,2-dichloropropionate
Other status information -
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) N
Herbicide Resistance Classification (WSSA) 8
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not applicable
Examples of recorded resistance -
Physical state Pale-coloured powder
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
  • Shell
  • Dow Chemicals
  • BASF
  • Diamond Shamrock
Example products using this active
  • Radapon
  • Dowpon
  • basinex
  • Revenge
  • Alatex
  • Ded-Weed
UK LERAP status No UK approval for use as a pesticide under EC Regulation 1107/2009
Formulation and application details Usually supplied as a water-soluble powder.


ENVIRONMENTAL FATE

for dalapon-sodium

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) 629000 K4 High
Solubility - In organic solvents at 20oC (mg l-1) 110000 L3 - Ethanol -
369000 L3 - Methanol -
3250 L3 - Acetone -
20 L3 - Benzene -
Melting point (oC) 166.5 L3 - Decomposes -
Boiling point (oC) - - -
Degradation point (oC) - - -
Flashpoint (oC) - - -
Octanol-water partition coefficient at pH 7, 20oC P 6.92 X 1000 Calculated -
Log P 0.84 K4 Low
Bulk density (g ml-1)/Specific gravity 1.74 L3 -
Dissociation constant (pKa) at 25oC 1.79 L3 -
Note: Strong acid
Vapour pressure at 20oC (mPa) 0.017 L3 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) - - -
GUS leaching potential index Click here for a note on the limitations of the GUS index 5.91 Calculated High 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 2.86 X 10+00 Calculated -
Note -
Potential for particle bound transport index Click here for a note on the limitations of the potential for particle bound transport index - - -
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) 30 W2 Moderately persistent
DT50 (lab at 20oC) 30 Q2 Moderately persistent
DT50 (field) - - -
DT90 (lab at 20oC) - - -
DT90 (field) - - -
DT50 modelling endpoint - - -
Note Best available data
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 W4 -
Note Temperature sensitive, slow at 25 degC but quite rapid at 50 degC
Water-sediment DT50 (days) - - -
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 - DW3 Very mobile
Koc 1
Notes and range Other sources: 2.34-151.4 mL/g (R3)
Freundlich Kf - - -
Kfoc -
1/n -
Notes and range -
pH sensitivity -


ECOTOXICOLOGY

for dalapon-sodium

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) 2.5 P4 Low potential
CT50 (days) Not available -
Mammals - Acute oral LD50 (mg kg-1) 9330 L3 Rat Low
Mammals - Short term dietary NOEL (mg kg-1) 15 L2 Rat, 2 year High
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) 5660 L2 Gallus gallus Low
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) 100 L3 Oncorhynchus mykiss Moderate
Fish - Chronic 21 day NOEC (mg l-1) - - -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 6 Q2 Unknown species Moderate
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) 20 W2 Unknown species Low
Algae - Chronic 96 hour NOEC, growth (mg l-1) - - -
Honeybees Contact acute 48 hour LD50 (μg bee-1) - - -
Oral acute 48 hour LD50 (μg bee-1) - - -
Unknown mode acute 48 hour LD50 (μg bee-1) > 50 Q3 Moderate
Earthworms - Acute 14 day LC50 (mg kg-1) 1058 L3 Low
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 dalapon-sodium

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) 9330 L3 Rat Low
Mammals - Dermal LD50 (mg kg-1 body weight) > 2000 L3 Rabbit -
Mammals - Inhalation LC50 (mg l-1) - - -
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 - - -
Exposure Limits - - -
Exposure Routes Public -
Occupational -
European MRLs Click here for the EU MRL pesticide database
Drinking Water Standards - - -
Drinking Water MAC (μg l-1) - - -

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

-

-

-

Respiratory tract irritant Skin irritant Skin sensitiser Eye irritant Phototoxicant

-

-

-

General human health issues Possible kidney toxicant

: 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: H315, H318
Environment: H412
EC Risk Classification Click here to view information omn the EU risk phrases Xn - Harmful: R22, R41
Xi - Irritant: R38
N - Dangerous for the environment: R52, R53
EC Safety Classification Click here to view information omn the EU safety phrases S2, S26, S39, S61
WHO Classification U - Unlikely to present an acute hazard
US EPA Classification (formulation) II - Warning - Moderately toxic
UN Number -
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for dalapon-sodium

Language Name
English dalapon-sodium
French dalapon sodium
German Dalapon natrium
Danish dalapon natrium
Italian dalapon sodio
Spanish dalapon sodio
Greek -
Slovenian dalapon natrij
Polish dalapon sodowy
Swedish -
Hungarian -
Dutch dalapon natrium

Record last updated: Monday 28 May 2018
Contact: aeru@herts.ac.uk