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oxasulfuron (Ref: CGA 277476 )
** Translations

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

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

Description: A post-emergence herbicide for grass and broad-leaved weed control

Example pests controlled: Abutilon theophrasti; Amarantus spp.; Chenopodium spp.; Echinochloa crus-galli; Sorghum halepense; Polygonum spp.

Example applications: Soybeans; Corn

Efficacy & activity: In tests target weeds yellowed and died in 1-3 weeks

Availability status: Current

Introduction & key dates: 1996

EC Regulation 1107/2009 (repealing 91/414):
Status Not approved
Dossier rapporteur/co-rapporteur Italy/Austria
Date inclusion expires 08/11/2019
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

Chemical structure: Click here for further information on the general chemical status information used on this site
Isomerism -
Chemical formula C17H18N4O6S
Canonical SMILES CC1=CC(=NC(=N1)NC(=O)NS(=O)(=O)C2=CC=CC=C2C(=O)OC3COC3)C
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) IOXAXYHXMLCCJJ-UHFFFAOYSA-N
International Chemical Identifier (InChI) InChI=1S/C17H18N4O6S/c1-10-7-11(2)19-16(18-10)20-17(23)21-28(24,25)14-6-4-3-5-13(14)15(22)27-12-8-26-9-12/h3-7,12H,8-9H2,1-2H3,(H2,18,19,20,21,23)
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 Sulfonylurea
Minimum active substance purity 980 g/kg
Known relevant impurities EU dossier - None declared
Substance origin Synthetic
Mode of action Absorbed by shoots and roots and translocatInhibits plant amino acid synthesis - acetohydroxyacid synthase AHAS
CAS RN 144651-06-9
EC number -
CIPAC number 626
US EPA chemical code -
PubChem CID 86443
Molecular mass (g mol-1) 406.41
PIN (Preferred Identification Name) -
IUPAC name oxetan-3-yl 2-[(4,6-dimethylpyrimidin-2-yl)carbamoylsulfamoyl]benzoate
CAS name 3-oxetanyl 2-[[[[(4,6-dimethyl-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoate
Other status information -
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) B
Herbicide Resistance Classification (WSSA) 2
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not applicable
Examples of recorded resistance Amaranthus quitensis
Helianthus annuus
Sorghum bicolor
Physical state White 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
  • Syngenta
Example products using this active
  • Chart
  • Dynam
UK LERAP status No UK approval for use as a pesticide under EC Regulation 1107/2009
Formulation and application details Usually supplied as water dispersible granules.


ENVIRONMENTAL FATE

for oxasulfuron

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) 1700 A5 High
Solubility - In organic solvents at 20oC (mg l-1) 2.2 A5 - n-Hexane -
320 A5 - Toluene -
1500 A5 - Methanol -
9300 A5 - Acetone -
Melting point (oC) 158 A5 -
Boiling point (oC) Decomposes before boiling A5 -
Degradation point (oC) 158 A5 -
Flashpoint (oC) Not expected to self ignite; Not highly flammable A5 -
Octanol-water partition coefficient at pH 7, 20oC P 1.55 X 10-01 Calculated -
Log P -0.81 A5 Low
Bulk density (g ml-1)/Specific gravity 1.41 A5 -
Dissociation constant (pKa) at 25oC 5.1 A5 -
Note: Weak acid, pKa(2) <1.0
Vapour pressure at 20oC (mPa) 0.002 A5 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) 2.50 X 10-03 A5 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 2.77 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 8.63 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 Low
Maximum UV-vis absorption L mol-1 cm-1 232.7nm = 23719, no absorption between 300nm and 900nm A5 -
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) 11.1 A5 Non-persistent
DT50 (lab at 20oC) 11.1 A5 Non-persistent
DT50 (field) 6 A5 Non-persistent
DT90 (lab at 20oC) 34.2 A5 -
DT90 (field) 30.5 A5 -
DT50 modelling endpoint - - -
Note EU 2016 dossier Lab studies DT50 range 4.6-49.6 days, DT90 range 18.9-97.3 days, Soils=13, Field studies DT50 range 3.2-3.9 days, Soils=2; EU 2002 dossier field studies DT50 range 0.5-9 days (EU and USA), DT90 range 6-65 days
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 3.5 A5 Moderately fast
Note DT50 3.5 days in daylight, 8.5 days in dark
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value 8.5 A5 Non-persistent
Note pH sensitive: DT50 6.5 days at pH 5, 8.5 days at pH 7 and pH 9, all at 25 degC
Water-sediment DT50 (days) 21.9 A5 Fast
Water phase only DT50 (days) 12 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 - A5 Moderately mobile
Koc 85
Notes and range EU 2002 dossier Koc range 5-162 mL/g
Freundlich Kf 0.235 A5 Mobile
Kfoc 22.5
1/n 1.04
Notes and range EU 2016 dossier Kf raange 0.12-0.33 mL/g, Kfoc range 17-30 mL/g, 1/n range 0.86-1.36, Soils=4
pH sensitivity Stronger adsorption with decreasing pH

Key metabolites:
Metabolite Formation medium Estimated maximum occurrence fraction 1107/2009 relevancy Click here for further information on 1107/2009 relevancy
1,2-benzisothiazol-3(2H)-one,1,1-dioxide (Ref: IN-00581) This metabolite may cause environmental pollution, click here for further information Soil   0.985   Major fraction, Relevant
4,6-dimethyl-pyrimidin-2-ylamine (Ref: CGA 322985) This metabolite may cause environmental pollution, click here for further information Soil   0.547   Major fraction, Relevant

Other known metabolites:
Metabolite name and reference Aliases Formation medium / Rate Estimated maximum occurrence fraction Metabolising enzymes
3-guanidine-1-butene - Water (Photolysis) 0.240 -
guanidine - Water (Photolysis) 0.330 -
2-sulfamoylbenzoic acid
(Ref: CGA 177288)
Note: CAS RN: 632-24-6
- Soil 0.201 -
(Ref: CGA 277476) - Soil bound residues - -
oxetan-3-yl 2-sulfamoylbenzoate
(Ref: CGA 277514)
- Plant - -
oxetanol
(Ref: CGA 297691)
- a = Soil (Anaerobic); Water (b = Abiotic, c = Photolysis) a = 0.880 -
(2-amino-6-methylpyrimidin-4-yl)methanol
(Ref: CGA 340355)
- Plant; Poultry; Animal - -
(Ref: M3)
Note: DT50(soil) = 117 days
- Soil (a = Aerobic, b = Anaerobic) a = 0.250; b = 0.300 -


ECOTOXICOLOGY

for oxasulfuron

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) Low risk A5 Based on LogP < 3 Low potential
CT50 (days) - -
Mammals - Acute oral LD50 (mg kg-1) > 5000 A5 Rat Low
Mammals - Short term dietary NOEL (mg kg-1) - A5 Rat -
(ppm diet) > 5000 -
Birds - Acute LD50 (mg kg-1) > 2250 A5 Anas platyrhynchos Low
Birds - Short term dietary (LC50/LD50) > 5620 mg kg feed-1 A5 Anas platyrhynchos -
Fish - Acute 96 hour LC50 (mg l-1) > 111 A5 Lepomis macrochirus Low
Fish - Chronic 21 day NOEC (mg l-1) > 114 A4 Pimephales promelas, 35 day Low
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) > 89.4 A5 Daphnia magna Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) 14 A5 Daphnia magna Low
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) > 0.097 A5 Lemna gibba Moderate
Non-target plants - - -
- - -
Algae - Acute 72 hour EC50, growth (mg l-1) 0.145 A4 Raphidocelis subcapitata, 72 hour Moderate
Algae - Chronic 96 hour NOEC, growth (mg l-1) - - -
Honeybees Contact acute 48 hour LD50 (μg bee-1) 741 A5 Low
Oral acute 48 hour LD50 (μg bee-1) > 741 A5 Low
Unknown mode acute 48 hour LD50 (μg bee-1) - - -
Earthworms - Acute 14 day LC50 (mg kg-1) > 1000 A5 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 0
12.7
Mortality
Fecundity
Dose: 0.075 kg ha-1
A5 Aphidius rhopalosiphi, adult
-
Other arthropod (2) LR50 g ha-1 - - -
% Effect 0
44
Mortality
Fecundity
Dose: 0.075 kg ha-1
A5 Typhlodromus pyri, protonymph
-
Soil micro-organisms Nitrogen mineralisation: No significant adverse effect
Carbon mineralisation: No significant adverse effect
A5
Dose: 0.9 kg ha-1, 28 days
-
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


HUMAN HEALTH AND PROTECTION

for oxasulfuron

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) 5.1 A5 Rat (nose only) -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.013 A5 Dog, 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) 0.013 A4 Dog, 1 year, SF=100 -
Dermal penetration studies (%) 1.0 A5 -
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 Possible liver, spleen & bladder 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 Not explosive or oxidising
CLP classification 2013 Health: H373
Environment: H400, H410
EC Risk Classification Click here to view information omn the EU risk phrases Xn - Harmful: R48/22
N - Dangerous for the environment: R50, R53
EC Safety Classification Click here to view information omn the EU safety phrases S2, S46, S60, S61
WHO Classification NL - Not listed
US EPA Classification (formulation) No consensus across products or no products available - -
UN Number Usually 3077
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for oxasulfuron

Language Name
English oxasulfuron
French oxasulfuron
German Oxasulfuron
Danish oxasulfuron
Italian oxasulfuron
Spanish oxasulfuron
Greek oxasulfuron
Slovenian oksasulfuron
Polish oksasulfuron
Swedish -
Hungarian -
Dutch oxasulfuron

Record last updated: Thursday 09 August 2018
Contact: aeru@herts.ac.uk