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metam-potassium
** 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 metam-potassium

Description: A multi-action crop protection agent used as a pre-planting soil sterilant

Example pests controlled: Weed and disease suppression including control of annual bluegrass, chickweed, ragweed, nutgrass, morning glory, Sclerotina, club root and Rhizoctonia

Example applications: Vegetables; Fruit; Ornamentals; Fiber crops; Cover crops

Efficacy & activity: -

Availability status: Unknown

Introduction & key dates: 1951, first reported

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

Status Approved
Dossier rapporteur/co-rapporteur Belgium
Date inclusion expires 30/06/2022
EU Candidate for substitution (CfS) Yes - low ADI / ARfD / AOEL
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 C2H4KNS2
Canonical SMILES CNC(=S)[S-].[K+]
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) DQRQIQZHRCRSDB-UHFFFAOYSA-M
International Chemical Identifier (InChI) InChI=1S/C2H5NS2.K/c1-3-2(4)5;/h1H3,(H2,3,4,5);/q;+1/p-1
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 Fungicide, Insecticide, Nematicide, Soil sterilent
Substance group Carbamate
Minimum active substance purity -
Known relevant impurities -
Substance origin Synthetic
Mode of action Soil fumigant, binds to oxygen carrying molecules and prevents tissues from using oxygen.
CAS RN 137-41-7
EC number 205-29-25
CIPAC number -
US EPA chemical code 039002
PubChem CID 23690432
Molecular mass (g mol-1) 145.28
PIN (Preferred Identification Name) potassium methylcarbamodithioate
IUPAC name postassium methylcarbamodithioate
CAS name potassium N-methylcarbamodithioate
Other status information PAN bad actor; Marine pollutant
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) Not known
Herbicide Resistance Classification (WSSA) -
Insecticide Resistance Classification (IRAC) Not known
Fungicide Resistance Classification (FRAC) Not known
Examples of recorded resistance -
Physical state Colourless crystalline solid
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
  • Taminco N.V.
Example products using this active
  • Tamifume
  • Sectagon K-54
UK LERAP status None (may vary with mixtures)
Formulation and application details Usually supplied formulated for use as a fumigant.


ENVIRONMENTAL FATE

for metam-potassium

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) 722000 Q3 High
Solubility - In organic solvents at 20oC (mg l-1) 5000 Q3 - Acetone -
5000 Q3 - Ethanol -
5000 Q3 - Xylene -
Melting point (oC) Decomposes before melting Q3 -
Boiling point (oC) Decomposes before boiling Q3 -
Degradation point (oC) - - -
Flashpoint (oC) - - -
Octanol-water partition coefficient at pH 7, 20oC P - - -
Log P - - -
Bulk density (g ml-1)/Specific gravity - - -
Dissociation constant (pKa) at 25oC - - -
Note:
Vapour pressure at 20oC (mPa) - - -
Henry's law constant at 25oC (Pa m3 mol-1) - - -
GUS leaching potential index Click here for a note on the limitations of the GUS index - - -
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 - - -
Note -
Potential for particle bound transport index Click here for a note on the limitations of the potential for particle bound transport index - - -
Maximum UV-vis absorption L mol-1 cm-1 - - -
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) - - -
DT50 (lab at 20oC) - - -
DT50 (field) - - -
DT90 (lab at 20oC) - - -
DT90 (field) - - -
DT50 modelling endpoint - - -
Note: -
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 - - -
Note -
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value - - -
Note -
Water-sediment DT50 (days) - - -
Water phase only DT50 (days) - - -

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 - - -
Kfoc -
1/n -
Notes and range -
pH sensitivity -

Key metabolites:

Metabolite Formation medium Estimated maximum occurrence fraction 1107/2009 relevancy Click here for further information on 1107/2009 relevancy
methyl isothiocyanate (Ref: SN-32866) This metabolite may cause environmental pollution, click here for further information Soil   0.829   Major fraction, Relevant

Other known metabolites:

Metabolite name and reference Aliases Formation medium / Rate Estimated maximum occurrence fraction Metabolising enzymes
N,Ní-dimethylthiourea DMTU Groundwater; Water/sediment - -
dimethylurea DMU Water/sediment - -
- DMTD Water/sediment - -


ECOTOXICOLOGY

for metam-potassium

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) - - -
CT50 (days) - -
Mammals - Acute oral LD50 (mg kg-1) 630 Q3 Rabbit Moderate
Mammals - Short term dietary NOEL (mg kg-1) - - -
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) > 211 A3 Colinus virginianus> as metam-sodium Moderate
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) > 54.0 F4 Oncorhynchus mykiss Moderate
Fish - Chronic 21 day NOEC (mg l-1) - - -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) - - -
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) - - -
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) - - -
Non-target plants - - -
- - -
Algae - Acute 72 hour EC50, growth (mg l-1) - - -
Algae - Chronic 96 hour NOEC, growth (mg l-1) - - -
Honeybees (Apis spp.) Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) - - -
Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) - - -
Unknown mode acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) - - -
Bumblebees (Bombus spp.) Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) - - -
-
Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) - - -
-
Mason bees (Osmia spp.) Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) - - -
Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) - - -
Other pollinators (1) Acute LD50 (worst case from 24 , 48 and 72 hour values - μg insect-1) - - -
Mode of exposure -
Other pollinators (2) Acute LD50 (worst case from 24 , 48 and 72 hour values - μg insect-1) - - -
Mode of exposure -
Earthworms - Acute 14 day LC50 (mg kg-1) > 400 A2 Eisenia foetida for metam-sodium Moderate
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 - - -
Other arthropod (2) LR50 g ha-1 - - -
% Effect - - -
Soil micro-organisms - - -
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


HUMAN HEALTH AND PROTECTION

for metam-potassium

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) 630 Q3 Rabbit Moderate
Mammals - Dermal LD50 (mg kg-1 body weight) > 1000 Q3 Rat -
Mammals - Inhalation LC50 (mg l-1) - - -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.001 A5 -
ARfD - Acute Reference Dose (mg kg-1bw day-1) 0.1 A5 -
AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw day-1) - - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) 0.001 A5 -
Dermal penetration studies (%) - - -
Dangerous Substances Directive 76/464 - - -
Exposure Routes Public -
Occupational -
European MRLs Click here for the EU MRL pesticide database
Drinking Water Standards - - -
Drinking Water MAC (μg l-1) - - -

Health issues:

Carcinogen Genotoxic Endocrine disrupter Reproduction / development effects Cholinesterase inhibitor Neurotoxicant

A0; B0; C0; D0; E0

Respiratory tract irritant Skin irritant Skin sensitiser Eye irritant Phototoxicant

-

-

General human health issues Highly toxic
Key: Genotoxicity
A: Chromosome aberration (EFSA database)
B: DNA damage/repair (EFSA database)
C: Gene mutation (EFSA database)
D: Genome mutation (EFSA database)
E: Unspecified genotoxicity type (miscellaneous data source)
0: No data
1: Positive
2: Mixed/ambiguous results
3: Negative
Key: Other
: 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 Corrosive
May liberate toxic gas when in contact with acids
Not explosive or oxidising
IMDG Transport Code is usually 8
CLP classification 2013 Health: H302, H314, H317
Environment: H400, H410
EC Risk Classification Click here to view information omn the EU risk phrases Reproduction risk category 3: R63
Xn - Harmful: R22, R43
H - Handling risks: R31, R34
N - Dangerous for the environment: R50, R53
EC Safety Classification Click here to view information omn the EU safety phrases S1/2, S26, S36/37/39, S45, S60, S61
WHO Classification II - Moderately hazardous
UN Number 2771 for active, variable with product, usually 3082 or 3267
Waste disposal & packaging Click here for a description of UN packaging marks Spilled product is a hazardous waste and disposal must be at an approved manner
Packaging Group III (minor danger)


TRANSLATIONS

for metam-potassium

Language Name
English metam-potassium
French -
German -
Danish -
Italian -
Spanish -
Greek -
Slovenian -
Polish -
Swedish -
Hungarian -
Dutch -

Record last updated: Thursday 23 August 2018
Contact: aeru@herts.ac.uk
© University of Hertfordshire