Cloransulam-methyl is a post-emergence herbicide. It has a moderate aqueous solubility, is non-volatile and, based on its chemical properties, is mobile and may leach to groundwater in some situations. It is generally non- persistent in soil systems but usually degrades quickly in aquatic systems via photolysis. It is not susceptible to hydrolysis. It has a low mammalian toxicity and has a high potential for bioaccumulation. It is a skin and eye irritant. It has a low level of toxicity to birds and aquatic invertebrates but is more toxic to fish, aquatic plants, algae, earthworms and honeybees.
Data alerts
The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.
Example manufacturers & suppliers of products using this active now or historically
Dow Chemical Co.
Example products using this active
Pacto
FirstRate
Supra
Formulation and application details
-
ENVIRONMENTAL FATE
Property
Value
Source; quality score; and other information
Interpretation
Solubility - In water at 20 °C (mg l⁻¹)
184
P4 P = Other non-EU, UK or US Governments and Regulators 4 = Verified data
Moderate
Solubility - In organic solvents at 20 °C (mg l⁻¹)
4360
P4 P = Other non-EU, UK or US Governments and Regulators 4 = Verified data
Acetone
-
6980
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Dichloromethane
-
980
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Ethyl acetate
-
470
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Methanol
-
Melting point (°C)
217
V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID ) 3 = Unverified data of known source
-
Boiling point (°C)
-
-
-
Degradation point (°C)
-
-
-
Flashpoint (°C)
-
-
-
Octanol-water partition coefficient at pH 7, 20 °C
P
4.32 X 10-01
Calculated
-
Log P
-0.365
P4 P = Other non-EU, UK or US Governments and Regulators 4 = Verified data
Low
Fat solubility of residues
Solubility
-
-
-
Data type
-
-
-
Density (g ml⁻¹)
1.54
P4 P = Other non-EU, UK or US Governments and Regulators 4 = Verified data
-
Dissociation constant pKa) at 25 °C
4.81
P4 P = Other non-EU, UK or US Governments and Regulators 4 = Verified data
-
Weak acid
Vapour pressure at 20 °C (mPa)
4.0 X 10-11
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Low volatility
Henry's law constant at 25 °C (Pa m³ mol⁻¹)
9.35 X 10-14
P4 P = Other non-EU, UK or US Governments and Regulators 4 = Verified data
Non-volatile
Volatilisation as max % of applied dose lost
From plant surface
-
-
-
From soil surface
-
-
-
Maximum UV-vis absorption L mol⁻¹ cm⁻¹
-
-
-
Surface tension (mN m⁻¹)
-
-
-
Degradation
Property
Value
Source; quality score; and other information
Interpretation
General biodegradability
-
Soil degradation (days) (aerobic)
DT₅₀ (typical)
11
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Non-persistent
DT₅₀ (lab at 20 °C)
15
R4 R = Peer reviewed scientific publications 4 = Verified data
Non-persistent
DT₅₀ (field)
10
R4 R = Peer reviewed scientific publications 4 = Verified data
Non-persistent
DT₉₀ (lab at 20 °C)
-
-
-
DT₉₀ (field)
-
-
-
DT₅₀ modelling endpoint
-
-
-
Note
Literature values lab studies DT₅₀ range 9-21 days, Field studies DT₅₀ range 4.2 to 24.1 days (R4)
Dissipation rate RL₅₀ (days) on plant matrix
Value
-
-
-
Note
-
Dissipation rate RL₅₀ (days) on and in plant matrix
Value
3.9
R3 R = Peer reviewed scientific publications 3 = Unverified data of known source
-
Note
Soybean, whole plant, n=1
Aqueous photolysis DT₅₀ (days) at pH 7
Value
0.01
F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment ) 3 = Unverified data of known source
Fast
Note
Photolysis around 20 mins
Aqueous hydrolysis DT₅₀ (days) at 20 °C and pH 7
Value
175
R4 R = Peer reviewed scientific publications 4 = Verified data
Persistent
Note
pH sensitive : >365 days at pH 5, 118-231 days at pH 7, 3 days at pH 9, 10 days in natural water at pH 8, 67 days soil slurry at pH 6.5
Water-sediment DT₅₀ (days)
-
-
-
Water phase only DT₅₀ (days)
-
-
-
Sediment phase only DT₅₀ (days)
-
-
-
Air degradation
As this parameter is not normally measured directly, a surrogate measure is used: ‘Photochemical oxidative DT₅₀’. Where data is available, this can be found in the Fate Indices section below.
Decay in stored produce DT₅₀
-
Soil adsorption and mobility
Property
Value
Source; quality score; and other information
Interpretation
Linear
Kd (mL g⁻¹)
-
F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment ) 3 = Unverified data of known source
Mobile
Koc (mL g⁻¹)
30
Notes and range
Other sources: Koc range 12-262 mL g⁻¹ (R3)
Freundlich
Kf (mL g⁻¹)
-
-
-
Kfoc (mL g⁻¹)
-
1/n
-
Notes and range
-
pH sensitivity
-
Fate indices
Property
Value
Source; quality score; and other information
Interpretation
GUS leaching potential index
2.52
Calculated
Transition state
SCI-GROW groundwater index (μg l⁻¹) for a 1 kg ha⁻¹ or 1 l ha⁻¹ application rate
Value
5.71 X 10-02
Calculated
-
Note
-
Potential for particle bound transport index
Low
Calculated
-
Potential for loss via drain flow
Mobile
Calculated
-
Photochemical oxidative DT₅₀ (hrs) as indicator of long-range air transport risk
-
-
-
Bio-concentration factor
BCF (l kg⁻¹)
Low risk
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source
Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242
Environmental fate
Ecotoxicity
Human health
