Trimethacarb is an insecticide and animal repellent. It is moderately soluble in water, is quite volatile and there is also a slight risk of leaching to groundwater. It is not generally persistent in soil systems. It may degrade quickly via hydrolysis in aquatic systems. It is moderately toxic to mammals but would not be expected to bioaccumulate. It is an acetyl cholinesterase inhibitor and a neurotoxin. It shows a moderate to high level of toxicity to most aquatic species.
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.
Mainly stomach action but has some contact effects, Cholinesterase inhibitor
CAS RN
2686-99-9
EC number
220-245-9
CIPAC number
130
US EPA chemical code
102401
PubChem CID
17592
Molecular mass
193.24
PIN (Preferred Identification Name)
reaction product comprising from 3.5 to 5 parts by mass of 3,4,5-trimethylphenyl methylcarbamate to 1 part by mass of 2,3,5-trimethylphenyl methylcarbamate
IUPAC name
reaction product comprising from 3.5 to 5 parts by mass of 3,4,5-trimethylphenyl methylcarbamate to 1 part by mass of 2,3,5-trimethylphenyl methylcarbamate
CAS name
2,3,5(or 3,4,5)-trimethylphenyl methylcarbamate
Other status information
Phytotoxic to some crop seeds including maize, wheat and rice
Relevant Environmental Water Quality Standards
-
Herbicide Resistance Classification (HRAC)
Not applicable
Herbicide Resistance Classification (WSSA)
Not applicable
Insecticide Resistance Classification (IRAC)
1A
Fungicide Resistance Classification (FRAC)
Not applicable
Examples of recorded resistance
-
Physical state
Off-white to brown granules
Formulations
Property
Value
Example manufacturers & suppliers of products using this active now or historically
Union Carbide
Example products using this active
Broot
Landrin
Formulation and application details
Usually supplied as a granular formulation
ENVIRONMENTAL FATE
Property
Value
Source; quality score; and other information
Interpretation
Solubility - In water at 20 °C (mg l⁻¹)
58
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Moderate
Solubility - In organic solvents at 20 °C (mg l⁻¹)
Octanol-water partition coefficient at pH 7, 20 °C
P
3.55 X 1002
Calculated
-
Log P
2.55
K3 K = Research datasets, e.g. Pandora, Demetra 3 = Unverified data of known source
Low
Density (g ml⁻¹)
1.05
Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source
-
Dissociation constant pKa) at 25 °C
-
-
-
-
Vapour pressure at 20 °C (mPa)
6.8
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Moderately volatile
Henry's law constant at 25 °C (Pa m³ mol⁻¹)
4.38 X 10-03
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
Non-volatile
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)
20
DW4 DW = Don Wauchope personal database for Pka data: Wauchope, R. D. and Edwards, J. Dissociation constants for pesticide active ingredients: a database and comparison with predicted values. MS in preparation 4 = Verified data
DW4 DW = Don Wauchope personal database for Pka data: Wauchope, R. D. and Edwards, J. Dissociation constants for pesticide active ingredients: a database and comparison with predicted values. MS in preparation 4 = Verified data
Moderately mobile
Koc
400
Notes and range
-
Freundlich
Kf
-
-
-
Kfoc
-
1/n
-
Notes and range
-
pH sensitivity
-
Fate indices
Property
Value
Source; quality score; and other information
Interpretation
GUS leaching potential index
2.38
Calculated
Transition state
SCI-GROW groundwater index (μg l⁻¹) for a 1 kg ha⁻¹ or 1 l ha⁻¹ application rate
Value
1.30 X 10-01
Calculated
-
Note
-
Potential for particle bound transport index
Low
Calculated
-
Potential for loss via drain flow
Moderately mobile
Calculated
-
Bio-concentration factor
BCF (l kg⁻¹)
60
Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown 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
Human health
