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GET ADDITIONAL DATA HERE!

pencycuron (Ref: NTN 19701)
** Translations

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

SUMMARY

Pencycuron is a phenylurea fungicide approved for use in the EU. It is virtually insoluble in water but will dissolve in most common organic solvents. It is volatile and not expected to leach to groundwater. It is moderately persistent in soils and slightly more so in water systems. It is not highly toxic to mammals but is moderately toxic to birds, most aquatic organisms, honeybees and earthworms.

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

Description: A fungicide used to control diseases caused by Rhizoctonia solani and Pellicularia spp.

Example pests controlled: Black scurf; Sheath blight; Rot; Damping-off

Example applications: Potatoes; Sugarbeet; Rice; Cotton; Ornamentals; Rice

Efficacy & activity: -

Availability status: Current

Introduction & key dates: 1984

EC Regulation 1107/2009 (repealing 91/414):
Status Approved
Dossier rapporteur/co-rapporteur Latvia/Poland
Date inclusion expires 31/05/2021
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 -
Chemical formula C19H21ClN2O
Canonical SMILES C1CCC(C1)N(CC2=CC=C(C=C2)Cl)C(=O)NC3=CC=CC=C3
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) OGYFATSSENRIKG-UHFFFAOYSA-N
International Chemical Identifier (InChI) InChI=1S/C19H21ClN2O/c20-16-12-10-15(11-13-16)14-22(18-8-4-5-9-18)19(23)21-17-6-2-1-3-7-17/h1-3,6-7,10-13,18H,4-5,8-9,14H2,(H,21,23)
Structure diagram/image available? Yes

General status: Click here for further information on the general chemical status information used on this site
Pesticide type Fungicide
Substance group Phenylurea
Minimum active substance purity 980 g/kg
Known relevant impurities EU dossier - None declared
Substance origin Synthetic
Mode of action Non-systemic with protective action. Inhibition of mitosis and cell division.
CAS RN 66063-05-6
EC number 266-096-3
CIPAC number 402
US EPA chemical code 128823
PubChem CID 91692
Molecular mass (g mol-1) 328.84
PIN (Preferred Identification Name) -
IUPAC name 1-(4-chlorobenzyl)-1-cyclopentyl-3-phenylurea
CAS name N-((4-chlorophenyl)methyl)-N-cyclopentyl-N'-phenylurea
Other status information -
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) Not applicable
Herbicide Resistance Classification (WSSA) Not applicable
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) 20
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
  • AgriGuard
  • Bayer CropScience
  • Standon
Example products using this active
  • Monceren DS
  • Monceren IM
  • Pency Flowable
UK LERAP status None
Formulation and application details Often supplied as a dry powder for seed treatment or as water-dispersible powders.


ENVIRONMENTAL FATE

for pencycuron

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) 0.3 A5 Low
Solubility - In organic solvents at 20oC (mg l-1) 230 A5 - n-Heptane -
11500 A5 - Xylene -
89400 A5 - Acetone -
43800 A5 - Ethyl acetate -
Melting point (oC) 132 A5 -
Boiling point (oC) 286 A5 -
Degradation point (oC) 140 A3 - decomposition begins -
Flashpoint (oC) Not expected to self ignite; Not highly flammable A5 -
Octanol-water partition coefficient at pH 7, 20oC P 4.79 X 1004 Calculated -
Log P 4.68 A5 High
Bulk density (g ml-1)/Specific gravity 1.22 A5 -
Dissociation constant (pKa) at 25oC Not applicable A5 -
Note: No dissociation
Vapour pressure at 20oC (mPa) 4.1 X 10-04 A5 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) 5.10 X 10-04 A5 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 0.59 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 1.16 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 High
Maximum UV-vis absorption L mol-1 cm-1 Maxima at 240nm = 19720, 291nm = 10 A5 -
Surface tension (mN m-1) 72.1 A5 at 20oC -

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) 82.4 A5 Moderately persistent
DT50 (lab at 20oC) 82.4 A5 Moderately persistent
DT50 (field) 37.7 A5 Moderately persistent
DT90 (lab at 20oC) 245 A5 -
DT90 (field) 140 A5 -
DT50 modelling endpoint - - -
Note EU dossier lab studies DT50 range 43.7-175 days, DT90 range 159-625 days; field studies DT50 range 31.7-43.7 days, DT90 range 108.1-171.5 days
Dissipation rate RL50 on plant matrix Value - - -
Note -
Dissipation rate RL50 on and in plant matrix Value 2.2 R3 -
Note Rice straw, n=1
Aqueous photolysis DT50 (days) at pH 7 Value Stable A5 -
Note -
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value 156 A5 Persistent
Note pH and temperature sensitive: DT50 4.7 days at pH 5, 14.2 days at pH 7, 15 days at pH 9, all at 50 deg C; extrapolated to 156 days for pH 7 at 25 degC
Water-sediment DT50 (days) 113.5 A5 Slow
Water phase only DT50 (days) 5.3 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 46.0 A5 Non-mobile
Kfoc 4906
1/n 1.11
Notes and range EU dossier Kf range 28.4-56.7 mL/g, Kfoc range 2414-10441 mL/g, 1/n range 0.906-1.206, Soils=4
pH sensitivity No

Key metabolites:
Metabolite Formation medium Estimated maximum occurrence fraction 1107/2009 relevancy Click here for further information on 1107/2009 relevancy
N-((4-chlorophenyl)-methyl)-N-cyclopentylamide This metabolite may cause environmental pollution, click here for further information Soil   0.184   Major fraction, Relevant
1-cyclopentyl-3-phenylurea Soil   0.066   Minor fraction, Not relevant

Other known metabolites:
Metabolite name and reference Aliases Formation medium / Rate Estimated maximum occurrence fraction Metabolising enzymes
4-chloro-hippuric acid - Rat (Urinary) - -
N-(4-chlorobenzyl)-N-cyclopentylamine
(Ref: THS 3995)
PB-amine; pencycuron metabolite M16 Soil; Rat (Faeces, Bile, Liver); Plant; Water/sediment - -


ECOTOXICOLOGY

for pencycuron

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) 226 A5 Threshold for concern
CT50 (days) 90% in 3days -
Mammals - Acute oral LD50 (mg kg-1) > 5000 A5 Rat Low
Mammals - Short term dietary NOEL (mg kg-1) - L2 Rat, 2 year -
(ppm diet) > 50 -
Birds - Acute LD50 (mg kg-1) > 2000 A5 Colinus virginianus Low
Birds - Short term dietary (LC50/LD50) > 1750 mg kg bw-1 day-1 A5 Colinus virginianus -
Fish - Acute 96 hour LC50 (mg l-1) > 0.3 A5 Oncorhynchus mykiss Moderate
Fish - Chronic 21 day NOEC (mg l-1) >= 0.3 A5 Oncorhynchus mykiss Moderate
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) > 0.3 A5 Daphnia magna Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) 0.05 A5 Daphnia magna Moderate
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) 0.3 A5 Chironomus riparius, emergence Moderate
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) > 0.3 A5 Scenedemus subspicatus Moderate
Algae - Chronic 96 hour NOEC, growth (mg l-1) 0.1 Q2 Unknown species Moderate
Honeybees Contact acute 48 hour LD50 (μg bee-1) > 100 A5 Low
Oral acute 48 hour LD50 (μg bee-1) > 98.5 A5 Moderate
Unknown mode acute 48 hour LD50 (μg bee-1) - - -
Earthworms - Acute 14 day LC50 (mg kg-1) > 1000 A5 Eisenia foetida Low
Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1) 3.3 A5 Eisenia foetida, 56 days Moderate
Other soil macro-organisms - e.g. Collembola LR50 / EC50 / NOEC / % Effect 60.0 A5 Folsomia candida, 28 day NOEC mg kg-1 -
Other arthropod (1) LR50 g ha-1 6200 >
A5 Typhlodromus pyri
-
% Effect - - -
Other arthropod (2) LR50 g ha-1 685 A5 Aphidius rhopalosiphi -
% Effect - - -
Soil micro-organisms Nitrogen mineralisation: No significant adverse effect
Carbon mineralisation: No significant adverse effect
A5
Dose: 3.44 kg ha-1
-
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


HUMAN HEALTH AND PROTECTION

for pencycuron

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) > 5000 A5 Rat Low
Mammals - Dermal LD50 (mg kg-1 body weight) > 2000 A5 Rat -
Mammals - Inhalation LC50 (mg l-1) > 5.13 A5 Rat, 4 hr -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.2 A4 Rat, SF=100 -
ARfD - Acute Reference Dose (mg kg-1bw day-1) None allocated A5 -
AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw day-1) - - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) 0.15 A4 Rat, SF=100 -
Dermal penetration studies (%) 0.2-12.5 A5 concentration dependent -
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 No further information available

: 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
CLP classification 2013 Environment: H410
EC Risk Classification Click here to view information omn the EU risk phrases None allocated at this time
EC Safety Classification Click here to view information omn the EU safety phrases S21
WHO Classification U - Unlikely to present an acute hazard
US EPA Classification (formulation) IV - Caution - Not acutely toxic
UN Number -
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for pencycuron

Language Name
English pencycuron
French pencycuron
German Pencycuron
Danish pencycuron
Italian pencicuron
Spanish pencicuron
Greek -
Slovenian pencikuron
Polish pencykuron
Swedish pencykuron
Hungarian pencycuron
Dutch pencycuron

Record last updated: Friday 14 September 2018
Contact: aeru@herts.ac.uk