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pyridate (Ref: CL 11344)
** puridate ** Translations

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

Description: A post-emergence herbicide used to control annual broad-leaved weeds

Example pests controlled: Broad-leaved weeds including nightshade, cleavers, nettles, chickweed;dead-nettle, fathen, ragweed; Grasses including barnyard grass, crabgrass, foxtail

Example applications: Cereals; Brassicas including cauliflowers, kohlrabi, broccoli, Brussels; Alliums including onions, shallots, chives, leek; Fodder beet; Lupins; Rape

Efficacy & activity: -

Availability status: Current

Introduction & key dates: circa 1980

EC Regulation 1107/2009 (repealing 91/414):
Status Approved
Dossier rapporteur/co-rapporteur Austria/Latvia
Date inclusion expires 31/12/2030
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 C19H23ClN2O2S
Canonical SMILES CCCCCCCCSC(=O)OC1=CC(=NN=C1C2=CC=CC=C2)Cl
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) JTZCTMAVMHRNTR-UHFFFAOYSA-N
International Chemical Identifier (InChI) InChI=1S/C19H23ClN2O2S/c1-2-3-4-5-6-10-13-25-19(23)24-16-14-17(20)21-22-18(16)15-11-8-7-9-12-15/h7-9,11-12,14H,2-6,10,13H2,1H3
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 Phenylpyridazine
Minimum active substance purity 900 g/kg
Known relevant impurities EU dossier - None declared
Substance origin Synthetic
Mode of action Selective with contact action, absorbed mainly by the leaves. Photosynthetic electron transport inhibitor at the photosystem II.
CAS RN 55512-33-9
EC number 259-686-7
CIPAC number 447
US EPA chemical code 128834
PubChem CID 41463
Molecular mass (g mol-1) 378.92
PIN (Preferred Identification Name) -
IUPAC name O-6-chloro-3-phenylpyridazin-4-yl S-octyl thiocarbonate
CAS name O-(6-chloro-3-phenyl-4-pyridazinyl) S-octyl carbonothioate
Other status information -
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) C3
Herbicide Resistance Classification (WSSA) 6
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
  • Syngenta
  • Sino Agro-Chemical Industry Ltd., Chemie Linz
Example products using this active
  • Tough
  • Lentagran WP
UK LERAP status None
Formulation and application details Usually supplied as an emulsifiable concentrate or wettable powder.


ENVIRONMENTAL FATE

for pyridate

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) 1.49 A5 Low
Solubility - In organic solvents at 20oC (mg l-1) 9000000 A5 - Acetone -
9000000 A5 - Kerosene -
9000000 A5 - Ethyl acetate -
9000000 A5 - Xylene -
Melting point (oC) 26.5 A5 -
Boiling point (oC) Decomposes before boiling A5 -
Degradation point (oC) 250 A5 -
Flashpoint (oC) Not expected to self ignite; Not highly flammable A5 -
Octanol-water partition coefficient at pH 7, 20oC P 1.02 X 1004 Calculated -
Log P 4.01 A5 High
Bulk density (g ml-1)/Specific gravity 1.28 A5 -
Dissociation constant (pKa) at 25oC Not applicable A5 -
Note: No dissociation
Vapour pressure at 20oC (mPa) 0.000998 A5 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) 1.21 X 10-04 A5 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 0.13 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 5.35 X 10-03 Calculated -
Note Estimated concentrations of chemicals with Koc values greater than 9995 ml g-1 are beyond the scope of the regression data used in SCI-GROW development. If there are concerns for such chemicals, a higher tier groundwater exposure assessment should be considered, regardless of the concentration returned by SCI-GROW
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 Neutral soln: 295nm=2533, 246nm=14415, 204nm=22393
Acidic soln: 295nm=2790, 247nm=14275, 204nm=24257
Basic soln: 307nm=8809, 295nm=7491,260nm=8581, 227nm=21374, 204nm=33893
A5 -
Surface tension (mN m-1) Not applicable 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 -
Soil degradation (days) (aerobic) DT50 (typical) 0.8 Click here to see a warning relating to modelling and this active substance A5 Non-persistent
DT50 (lab at 20oC) 0.8 A5 Non-persistent
DT50 (field) 2.2 A5 Non-persistent
DT90 (lab at 20oC) 3.9 A5 -
DT90 (field) 5.4 A5 -
DT50 modelling endpoint - - -
Note EU dossier lab studies DT50 range 0.3-3.3 days, DT90 range 1.2-10.8 days, field studies DT50 range 0.4-2.2 days, DT90 range 1.4-8,9 days, soils=7
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 1.8 A5 Moderately fast
Note pH sensitive: DT50 3.5 days at pH 5, 2.2 days at pH 9
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value 2.5 A5 Non-persistent
Note pH and temperature sensitive: DT50 4.9 days at pH 4 and 25 degC, 0.44 days at pH 4 and 50 degC, 0.28 days at pH 9 and 25 degC, 0.3 hours at pH 9 and 50 degC
Water-sediment DT50 (days) 0.5 A5 Fast
Water phase only DT50 (days) 0.3 A5 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 - A4 Non-mobile
Koc 223800
Notes and range -
Freundlich Kf - Q3 -
Kfoc -
1/n 1
Notes and range -
pH sensitivity -

Key metabolites:
Metabolite Formation medium Estimated maximum occurrence fraction 1107/2009 relevancy Click here for further information on 1107/2009 relevancy
pyridafol (Ref: CL 9673) This metabolite may cause environmental pollution, click here for further information Soil   0.907   Major fraction, Relevant
pyridafol-O-methyl (Ref: CL-9869) Soil   0.073   Minor fraction, Relevant


ECOTOXICOLOGY

for pyridate

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) 116 A5 (Whole fish) Threshold for concern
CT50 (days) Not available -
Mammals - Acute oral LD50 (mg kg-1) > 2000 A5 Rat Low
Mammals - Short term dietary NOEL (mg kg-1) 30 A4 Dog High
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) 1269 A5 Colinus virginianus Moderate
Birds - Short term dietary (LC50/LD50) > 5000 mg kg feed-1 A5 Colinus virginianus -
Fish - Acute 96 hour LC50 (mg l-1) > 1.01 A5 Oncorhynchus mykiss Moderate
Fish - Chronic 21 day NOEC (mg l-1) 0.08 A5 Oncorhynchus mykiss Moderate
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 0.49 A5 Daphnia magna Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) 0.01 A5 Daphnia magna Moderate
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) 3.3 F3 Americamysis bahia Moderate
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) > 2.0 A5 Lemna gibba Moderate
Non-target plants 49.6 A5 Beta vulgaris
Vegetative vigour, ER50
as g/ha
-
717 A5 Beta vulgaris
Seedling emergence, ER50
as g/ha
-
Algae - Acute 72 hour EC50, growth (mg l-1) > 0.75 A5 Anabaena flos-aquae Moderate
Algae - Chronic 96 hour NOEC, growth (mg l-1) 48 Q2 Unknown species Low
Honeybees Contact acute 48 hour LD50 (μg bee-1) > 100 A5 Low
Oral acute 48 hour LD50 (μg bee-1) > 100 A5 Low
Unknown mode acute 48 hour LD50 (μg bee-1) - - -
Earthworms - Acute 14 day LC50 (mg kg-1) 799 A5 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 1362 >
A5 Typhlodromus pyri
-
% Effect 6.9
-11
Mortality
Reproduction
Dose: 0.91 kg ha-1
A5 Aphidius rhopalosiphi, adult
-
Other arthropod (2) LR50 g ha-1 - - -
% Effect 4.2
-21.6
Mortality
Reproduction
Dose: 0.91 kg ha-1
A5 Typhlodromus pyri, protonymph
-
Soil micro-organisms Nitrogen mineralisation: No significant adverse effect
Carbon mineralisation: No significant adverse effect
A5
Dose: up to 19 mg kg-1 soil
-
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


HUMAN HEALTH AND PROTECTION

for pyridate

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) > 2000 A5 Rat Low
Mammals - Dermal LD50 (mg kg-1 body weight) > 2000 A5 Rat -
Mammals - Inhalation LC50 (mg l-1) > 4.37 A5 Rat, 4 hr (head/nose exposure) -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.036 A5 Rat, SF=100 -
ARfD - Acute Reference Dose (mg kg-1bw day-1) 0.4 A5 Rat, SF=400 -
AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw day-1) - - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) 0.036 A3 Rat, SF=100 -
Dermal penetration studies (%) 3-6 A5 concentration dependent -
Dangerous Substances Directive 76/464 - - -
Exposure Limits - - -
Exposure Routes Public No unacceptable risks to bystanders identified
Occupational No unacceptable risks to operators or other workers identified
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 Potential liver and kidney toxicant
May induce haematological changes
Endocrine issues - Binding to estrogen and androgen receptors

: 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 IMDG Transport Code is usually 9
Not explosive or oxidising
CLP classification 2013 Health: H315, H317
Environment: H400, H410
EC Risk Classification Click here to view information omn the EU risk phrases Xn - Harmful: R43
Xi - Irritant: R38
N - Dangerous for the environment: R50, R53
EC Safety Classification Click here to view information omn the EU safety phrases S2, S24, S37, S60, S61
WHO Classification III - Slightly hazardous
US EPA Classification (formulation) III - Caution - Slightly toxic
UN Number Usually 3077
Waste disposal & packaging Click here for a description of UN packaging marks Packaging Group III (minor danger)


TRANSLATIONS

for pyridate

Language Name
English pyridate
French pyridate
German Pyridat
Danish pyridat
Italian piridate
Spanish piridato
Greek pyridate
Slovenian piridat
Polish pyridat
Swedish pyridat
Hungarian -
Dutch pyridate

Record last updated: Thursday 23 August 2018
Contact: aeru@herts.ac.uk
© University of Hertfordshire