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asulam sodium (Ref: AE F102789)
** asulam ** HOE 102789 ** sodium asulam ** RPA 4143636 ** Hoe 102789 ** AE C518360 ** Translations

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

SUMMARY

Asulam sodium is a carbamate herbicide that is not approved for use in the EU. It is highly soluble in water, volatile with a low risk of leaching to groundwater. It is not persistent in soils but may be persistent in water especially under dark conditions. Although it is not highly toxic there is a risk of bioaccumulation. It is a skin, eye and respiratory system irritant and may cause undesirable effects on reproduction. Asulam sodium 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 asulam sodium

Description: A translocated carbamate herbicide for control of problematic weeds in cropped and non-cropped situations

Example pests controlled: Docks; Bracken; Ragwort

Example applications: Moorland; Amenity vegetation; Forestry; Spinach; Ornamentals including bulb production

Efficacy & activity: -

Availability status: Current

Introduction & key dates: 1965

EC Regulation 1107/2009 (repealing 91/414):
Status Not approved
Dossier rapporteur/co-rapporteur UK
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 C8H9N2O4SNa2
Canonical SMILES COC(=O)[N-]S(=O)(=O)C1=CC=C(C=C1)N.[Na+]
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) PEXLHWBDBQUUOG-UHFFFAOYSA-M
International Chemical Identifier (InChI) InChI=1S/C8H10N2O4S.Na/c1-14-8(11)10-15(12,13)7-4-2-6(9)3-5-7;/h2-5H,9H2,1H3,(H,10,11);/q;+1
2D structure diagram/image available? Yes

Click to access the Cambridge Crystallographic Data Centre (CCDC) website
Cambridge Crystallographic Data Centre diagrams:
Common Name Relationship Link
Asulam Parent Click here for the CCDC structure diagram

General status: Click here for further information on the general chemical status information used on this site
Pesticide type Herbicide
Substance group Carbamate
Minimum active substance purity 876 g/kg as sodium salt
Known relevant impurities EU dossier - None declared
Substance origin Synthetic
Mode of action Selective system action, absorbed by leaves, shoots and roots. Inhibition of dihydropterate synthase causing slow chlorosis.
CAS RN 2302-17-2
EC number 218-953-8
CIPAC number 240
US EPA chemical code 106902
PubChem CID 61292
Molecular mass (g mol-1) 253.23
PIN (Preferred Identification Name) sodium (4-aminobenzenesulfonyl)(methoxycarbonyl)azanide
IUPAC name sodium methyl (EZ)-sulfanilylcarbonimidate
CAS name methyl [(4-aminophenyl)sulfonyl]carbamate monosodium salt
Other status information Chemical subject to PIC regulations; PAN Listed as Highly Hazardous Chemical
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) I
Herbicide Resistance Classification (WSSA) 18
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not applicable
Examples of recorded resistance -
Physical state Colourless to white 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
  • United Phosphorus
  • Bayer CropScience
Example products using this active
  • Asulox
  • Brack-N
UK LERAP status No UK approval for use as a pesticide under EC Regulation 1107/2009
Formulation and application details Often available as a soluble liquid concentrate that is mixed with water and used as a spray.


ENVIRONMENTAL FATE

for asulam 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) 962000 A5 High
Solubility - In organic solvents at 20oC (mg l-1) 0.07 A5 - n-Heptane -
98 A5 - Xylene -
117000 A5 - Methanol -
1100 A5 - Acetone -
Melting point (oC) 230 A5 -
Boiling point (oC) 104 Q3 -
Degradation point (oC) 230 A5 -
Flashpoint (oC) Not expected to self ignite; Not highly flammable Q3 -
Octanol-water partition coefficient at pH 7, 20oC P 1.41 X 1000 Calculated -
Log P 0.15 A5 Low
Bulk density (g ml-1)/Specific gravity 1.53 A5 -
Dissociation constant (pKa) at 25oC 1.29 A5 -
Note: Strong acid; pKa(2) 4.68
Vapour pressure at 20oC (mPa) 5.00 X 10-04 A5 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) 1.31 X 10-10 A5 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 1.72 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 4.03 X 10-03 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 292nm = 2750 A5 -
Surface tension (mN m-1) 71.5 A5 at 20oC, 89.6% -

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) 4.6 A5 Non-persistent
DT50 (lab at 20oC) 4.6 A5 Non-persistent
DT50 (field) 356 A5 Persistent
DT90 (lab at 20oC) 19.5 A5 -
DT90 (field) 1000 A3 -
DT50 modelling endpoint - - -
Note EU dossier 2006 lab studies DT50 range 2.66-11.1 days, DT90 range 8.0-37.2 days, Soils=12; Field studies, DT50 & DT90 > 365 days; Other studies: DT50 6-14 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 1 A4 Moderately fast
Note DT50 0.78 days at pH 4, 1.56 days at pH 9
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value Stable A5 -
Note Stable at pH 5 to pH 9
Water-sediment DT50 (days) 72 A5 Moderately fast
Water phase only DT50 (days) 63 A5 Stable

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 0.949 A5 Mobile
Kfoc 25.4
1/n 0.75
Notes and range EU dossier kf range 0.150-3.28 mL/g, Kfoc range 15.4-149.7 mL/g, 1/n range 0.66-0.87, Soils=10
pH sensitivity No

Key metabolites:
Metabolite Formation medium Estimated maximum occurrence fraction 1107/2009 relevancy Click here for further information on 1107/2009 relevancy
4-aminobenzenesulphonamide This metabolite may cause environmental pollution, click here for further information Soil   0.139   Major fraction, Relevant

Other known metabolites:
Metabolite name and reference Aliases Formation medium / Rate Estimated maximum occurrence fraction Metabolising enzymes
methyl ((4-acetamidophenyl)sulphonyl)carbamate acetyl asulam Animal; Plant; Soil - -
N-(4-sulpamoylphenyl)acetamide acetyl-sulphanilamide Rat; Hen (eggs); Soil - -
methyl(((4-formylamino)phenyl)sulfonyl)carbamate formyl asulam Plant - -
aminobenzenesulphonic acid sulphanilic acid Soil - -
N-(4-aminophenyl)formamide AP Formamide Water - -
(4-(4-methoxycarbonylaminophenyl)aminophenyl)carbamic acid MCAPAP carbamic acid Water - -
4-sulphamoylphenylcarbamoylacetic acid malonyl sulphanilamide Processing - -
benzenesulphonamide - Soil - -
benzenesulphonic acid - Soil - -
a-acetylbenzenesulphonamide - Plant - -
4-(N-methoxycarbonylsulphamoylacetic acid
(Ref: AE 1388213)
malonyl-asulam Plant - -
methylphenylsulphonylcarbamate
(Ref: MB022232)
desamino asulam; MBSC Plant; Soil - -


ECOTOXICOLOGY

for asulam 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) 0.75 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) 36 A5 Rat High
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) > 1826 A5 Colinus virginianus, as asulam Moderate
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) > 91.3 A5 Lepomis macrochirus, as asulam Moderate
Fish - Chronic 21 day NOEC (mg l-1) 119.1 A5 Oncorhynchus mykiss, as asulam Low
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 57.87 A5 Daphnia magna, as asulam Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) 6.4 A5 Daphnia magna, as asulam 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) 91.3 A5 Chironomus riparius, as asulam Low
Sediment dwelling organisms - Chronic 28 day NOEC, sediment (mg kg-1) - - -
Aquatic plants - Acute 7 day EC50, biomass (mg l-1) 0.27 A5 Lemna gibba, as asulam Moderate
Non-target plants - - -
- - -
Algae - Acute 72 hour EC50, growth (mg l-1) > 0.66 A5 Anabaena flos-aquae, as asulam Moderate
Algae - Chronic 96 hour NOEC, growth (mg l-1) - - -
Honeybees Contact acute 48 hour LD50 (μg bee-1) > 100 A5, as asulam Low
Oral acute 48 hour LD50 (μg bee-1) > 123.7 A5, as asulam Low
Unknown mode acute 48 hour LD50 (μg bee-1) - - -
Earthworms - Acute 14 day LC50 (mg kg-1) 1004 A5 Eisenia foetida, as asulam Low
Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1) 180.7 A2 Eisenia foetida, Reproduction, as asulam Low
Other soil macro-organisms - e.g. Collembola LR50 / EC50 / NOEC / % Effect - - -
Other arthropod (1) LR50 g ha-1 3.088 48 hour
A5 Aphidius rhopalosiphi, as Asulox/ha
-
% Effect - - -
Other arthropod (2) LR50 g ha-1 7.566 7 day
A5 Typhlodromus pyri, as Asulox/ha
-
% Effect - - -
Soil micro-organisms Nitrogen mineralisation: Up to -26% effect
Carbon mineralisation: No significant adverse effect
A5
Dose: 0.16 g asulam/kg soil, 56 days
-
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


HUMAN HEALTH AND PROTECTION

for asulam 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) > 5000 A5 Rat Low
Mammals - Dermal LD50 (mg kg-1 body weight) > 2000 A5 Rat -
Mammals - Inhalation LC50 (mg l-1) > 5.46 A5 Rat -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.36 A5 Rat, SF=100 -
ARfD - Acute Reference Dose (mg kg-1bw day-1) 1 A5 Dog, SF=100 -
AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw day-1) - - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) 0.046 A5 -
Dermal penetration studies (%) 0.5-3 A5 concentration dependent -
Dangerous Substances Directive 76/464 - - -
Exposure Limits - - -
Exposure Routes Public Low risk of dietary exposure and accidental exposure of residents or bystanders
Occupational Risk of exposure acceptable under label recommendations for use for personal protection clothing and equipment
European MRLs Click here for the EU MRL pesticide database
Drinking Water Standards - - -
Drinking Water MAC (μg l-1) 0.1 EU Dir 89/778/EC limit; Calc MAC=1080 μg l-1; A5 -

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, thyroid and 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 Not explosive or oxidising
CLP classification 2013 Health: H317
EC Risk Classification Click here to view information omn the EU risk phrases Xn - Harmful: R43
N - Dangerous for the environment: R50, R53
EC Safety Classification Click here to view information omn the EU safety phrases S24, S37, S35, S57, S60, S61
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 asulam sodium

Language Name
English asulam sodium
French asulame
German Asulam
Danish asulam
Italian asulame
Spanish asulame
Greek -
Slovenian asulam natrij
Polish asulam sodowy
Swedish -
Hungarian aszulam
Dutch asulam

Record last updated: Tuesday 30 October 2018
Contact: aeru@herts.ac.uk