triasulfuron (Ref: CGA 131036 ) ** triazsulfuron ** Translations

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GENERAL INFORMATION
for triasulfuron

Description: A herbicide for annual broad-leaved weed control in cereals and for other weed clearing activities

Example pests controlled: Annual ryegrass; Paradoxa grass; Timothy; Wild radish; Deadnettles; Hedge mustard; Rough poppy; Wild turnip; Bermudagrass; Smooth brome

Example applications: Cereals including wheat, oats, barley; Non-crop areas including rangeland, roadsides, railways, industrial sites, paths, rights-of-way

Efficacy & activity: -

Availability status: Current

Introduction & key dates: circa 1985

EC Regulation 1107/2009 (repealing 91/414):

Status	Not Approved
Dossier rapporteur/co-rapporteur	France/Denmark
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:

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:

Isomerism	-
Chemical formula	C14H16ClN5O5S
Canonical SMILES	CC1=NC(=NC(=N1)OC)NC(=O)NS(=O)(=O)C2=CC=CC=C2OCCCl
Isomeric SMILES	No data
International Chemical Identifier key (InChIKey)	XOPFESVZMSQIKC-UHFFFAOYSA-N
International Chemical Identifier (InChI)	InChI=1S/C14H16ClN5O5S/c1-9-16-12(19-14(17-9)24-2)18-13(21)20-26(22,23)11-6-4-3-5-10(11)25-8-7-15/h3-6H,7-8H2,1-2H3,(H2,16,17,18,19,20,21)
2D structure diagram/image available?	Yes

General status:

Pesticide type	Herbicide
Substance group	Sulfonylurea
Minimum active substance purity	940 g/kg
Known relevant impurities	EU dossier - None declared
Substance origin	Synthetic
Mode of action	Selective, absorbed by leaves and roots and translocated. Inhibits plant amino acid synthesis - acetohydroxyacid synthase AHAS
CAS RN	82097-50-5
EC number	-
CIPAC number	480
US EPA chemical code	128969
PubChem CID	73282
Molecular mass (g mol-1)	401.8
PIN (Preferred Identification Name)	2-(2-chloroethoxy)-N-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)carbamoyl]benzene-1-sulfonamide
IUPAC name	1-[2-(2-chloroethoxy)phenylsulfonyl]-3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)urea
CAS name	2-(2-chloroethoxy)-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamide
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	Lolium multiflorum Lolium rigidum
Physical state	White powder
Related substances & organisms	-

Formulations:

Property	Value
Example manufacturers & suppliers of products using this active now or historically	Syngenta Titan Ag Logran
Example products using this active	Usually supplied as wettable granules for foliar application
UK LERAP status	No UK approval for use as a pesticide under EC Regulation 1107/2009
Formulation and application details	-

ENVIRONMENTAL FATE
for triasulfuron

Property		Value	Source/Quality Score/Other Information	Interpretation
Solubility - In water at 20oC (mg l-1)		815	A5	High
Solubility - In organic solvents at 20oC (mg l-1)		40	A5 - n-Hexane	-
		300	A5 - Toluene	-
		14000	A5 - Acetone	-
		4300	A5 - Ethyl acetate	-
Melting point (oC)		188.6	A5	-
Boiling point (oC)		Decomposes before boiling	A5	-
Degradation point (oC)		178.1	A5	-
Flashpoint (oC)		Not expected to self ignite; Not highly flammable	A5	-
Octanol-water partition coefficient at pH 7, 20oC	P	2.57 X 10-01	Calculated	-
	Log P	-0.59	A5	Low
Bulk density (g ml-1)/Specific gravity		1.47	A5	-
Dissociation constant (pKa) at 25oC		4.64	A5	-
		Note: Weak acid
Vapour pressure at 20oC (mPa)		0.0021	A5	Low volatility
Henry's law constant at 25oC (Pa m3 mol-1)		8.00 X 10-05	A5	Non-volatile
GUS leaching potential index		5.12	Calculated	High leachability
SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate	Value	4.13 X 10+00	Calculated	-
	Note	-
Potential for particle bound transport index		-	Calculated	Medium
Maximum UV-vis absorption L mol-1 cm-1		223.4nm = 26051, 282.8nm = 3415, shoulder between 240-250nm, no absorption after 340nm	A5	-
Surface tension (mN m-1)		63.9	A5	-

Degradation:

Property		Value	Source/Quality Score/Other Information	Interpretation
General biodegradability		-
Soil degradation (days) (aerobic)	DT50 (typical)	59.1	A5	Moderately persistent
	DT50 (lab at 20oC)	59.1	A5	Moderately persistent
	DT50 (field)	38.5	A5	Moderately persistent
	DT90 (lab at 20oC)	178.5	A5	-
	DT90 (field)	112.2	A5	-
	DT50 modelling endpoint	-	-	-
	Note	EU dossier lab studies DT50 range 20.7-118 days, DT90 range 68.8-243.3 days, field studies DT50 range 16.1-92.4 days, DT90 range 53.5-198 days; Other sources: 60 days (DW4)
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	Stable	A5	-
	Note	Not a significant degradation route, light has little effect
Aqueous hydrolysis DT50 (days) at 20oC and pH 7	Value	Stable	A5	-
	Note	pH sensitive: DT50 23 days at pH 5, stable at pH 7 and pH 9, all at 22 degC
Water-sediment DT50 (days)		217	A5	Slow
Water phase only DT50 (days)		217	A5	Stable

Soil adsorption and mobility:

Property		Value	Source/Quality Score/Other Information	Interpretation
Linear	Kd	-	DW4	Mobile
	Koc	60
	Notes and range	-
Freundlich	Kf	0.49	A5	Very mobile
	Kfoc	12.8
	1/n	0.850
	Notes and range	EU dossier 2014 Kf=0.05-2.65 mL/g, Kfoc range 7-25 mL/g; Literature data: Kf range 0.46-6.34 mL/g, Kfoc range 43.5-171 mL/g, 1/n range 0.68-0.88, soils = 3 (R4)
pH sensitivity		No

Key metabolites:

Metabolite		Formation medium	Estimated maximum occurrence fraction	1107/2009 relevancy
2-amino-4-methoxy-6-methyl-1,3,5-triazine (Ref: IN-A4098)		Soil	0.267	Major fraction, Relevant
O-demethyl triasulfuron (Ref: CGA 195660)		Soil	0.227	Major fraction, Relevant
N-((N-carbamoylcarbamimidoyl)carbamoyl)-2-(2-chloroethoxy)benzenesulfonamide (Ref: SYN546702)		Soil	0.169	Major fraction, Relevant

Other known metabolites:

Metabolite name and reference	Aliases	Formation medium / Rate	Estimated maximum occurrence fraction	Metabolising enzymes
chlorosulfonamide	-	Soil (Photolysis); Water	-	-
hydroxy chlorosulfonamide	-	Soil (Photolysis)	-	-

ECOTOXICOLOGY
for triasulfuron

Property		Value	Source/Quality Score/Other Information	Interpretation
Bio-concentration factor	BCF (l kg-1)	1.3	A5 Whole fish	Low potential
	CT50 (days)	Not available		-
Mammals - Acute oral LD50 (mg kg-1)		> 5000	A5 Rat	Low
Mammals - Short term dietary NOEL	(mg kg-1)	-	A5 Rat	-
	(ppm diet)	> 1000		-
Birds - Acute LD50 (mg kg-1)		> 2150	A5 Colinus virginianus	Low
Birds - Short term dietary (LC50/LD50)		> 5000 mg kg feed-1	A5 Colinus virginianus	-
Fish - Acute 96 hour LC50 (mg l-1)		> 100	A5 Oncorhynchus mykiss	Low
Fish - Chronic 21 day NOEC (mg l-1)		36.6	A5 Oncorhynchus mykiss	Low
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1)		> 100	A5 Daphnia magna	Low
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1)		10	A5 Daphnia magna	Moderate
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1)		17.2	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)		0.000068	A5 Lemna gibba	High
Non-target plants		-	-	-
		-	-	-
Algae - Acute 72 hour EC50, growth (mg l-1)		0.035	A3 Raphidocelis subcapitata, 12 day	Moderate
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)	100	A4	Moderate
	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	26.2	Beneficial capacity Dose: 0.025 kg ha-1 A5 Aphidius rhopalosiphi	-
Other arthropod (2)	LR50 g ha-1	-	-	-
	% Effect	3.1	Beneficial effect Dose: 0.025kg ha-1 A5 Typhlodromus pyri	-
Soil micro-organisms		Nitrogen mineralisation: No significant adverse effect Carbon mineralisation: No significant adverse effect	A5 Dose: 0.25 kg ha-1	-
Mesocosm study data	NOEAEC mg l-1	-	-	-
	NOEAEC mg l-1	-	-	-

HUMAN HEALTH AND PROTECTION
for triasulfuron

General:

Property		Value	Source/Quality Score/Other Information	Interpretation
Threshold of Toxicological Concern (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)		> 5.2	A5 Rat	-
Other Mammal toxicity endpoints		-		-
ADI - Acceptable Daily Intake (mg kg-1bw day-1)		0.01	A5 Mouse, 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)		0.3	A4 Dog, 1 year, SF=100	-
Dermal penetration studies (%)		0.03-3.0	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		Possible blood and liver toxicant

: Yes, known to cause a problem
: No, known not to cause a problem
: Possibly, status not identified
- : No data found

Handling issues:

Property		Value	Source/Quality Score/Other Information	Interpretation
General		IMDG Transport Code is usually 9
CLP classification 2013		Environment: H400, H410
EC Risk Classification		N - Dangerous for the environment: R50, R53
EC Safety Classification		S60, S61
WHO Classification		U	-	Unlikely to present an acute hazard
US EPA Classification (formulation)		III	-	Caution - Slightly toxic
UN Number		Usually 3077
Waste disposal & packaging		Packaging Group III (minor danger)

TRANSLATIONS
for triasulfuron

Language	Name
English	triasulfuron
French	triasulfuron
German	Triasulfuron
Danish	triasulfuron
Italian	triasulfuron
Spanish	triasulfuron
Greek	triasulfuron
Slovenian	triasulfuron
Polish	triasulfuron
Swedish	-
Hungarian	triaszulfuron
Dutch	triasulfuron

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Record last updated: Wednesday 30 May 2018
Contact: aeru@herts.ac.uk