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iodomethane (Ref: TM 425)
** monoiodomethane ** MeI ** methyl iodide ** Translations

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

GENERAL INFORMATION
for iodomethane

Description: A largely obsolete pre-plant fumigant biocide used to control a wide variety of pests

Example pests controlled: Insects, Plant parasitic nematodes, Soil borne pathogens, Weed seeds.

Example applications: Tomatoes; Peppers; Nut crops; Strawberries

Availability status: Current

Introduction & key dates: 2004, Japan

EC Regulation 1107/2009 (repealing 91/414):
Status Not listed
Dossier rapporteur/co-rapporteur Not applicable
Date inclusion expires Not applicable

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Also used in: [2012 - Withdrawn from the US market]

General status:
Pesticide type Soil sterilant, Insecticide, Nematicide
Substance group Alkyl iodide
Minimum active substance purity 100% by weight
Known relevant impurities -
Substance origin Synthetic
Mode of action Fumigant action thought to be via the nucleophilic displacement (SN2) reaction in various amino acids and peptides within target organisms
CAS RN 74-88-4
EC number 200-819-5
CIPAC number -
US EPA chemical code 000011
Chiral molecule No
Chemical formula CH3I
SMILES IC
International Chemical Identifier key (InChIKey) INQOMBQAUSQDDS-UHFFFAOYSA-N
International Chemical Identifier (InChI) InChI=1S/CH3I/c1-2/h1H3
Structure diagram/image available? Yes
Molecular mass (g mol-1) 141.94
PIN (Preferred Identification Name) iodomethane
IUPAC name methyl iodide
CAS name iodomethane
Other status information -
Herbicide Resistance Classification (HRAC) Not applicable
Herbicide Resistance Classification (WSSA) Not applicable
Insecticide Resistance Classification (IRAC) Not known
Fungicide Resistance Classification (FRAC) Not known
Examples of recorded resistance -
Physical state Courless transparent liquid
Related substances & organisms -

Formulations:
Property Value
Example manufacturers & suppliers of products using this active now or historically
  • Arysta LifeScience Corp
Example products using this active
  • Midas
UK LERAP status No UK approval for use or outside scope
Formulation and application details -


ENVIRONMENTAL FATE

for iodomethane

Property Value Source/Quality Score/Other Information Interpretation
Solubility - In water at 20oC (mg l-1) 14200 F3 High
Solubility - In organic solvents at 20oC (mg l-1) - - -
Melting point (oC) -66.5 F3 -
Boiling point (oC) 42 L3 -
Degradation point (oC) - - -
Flashpoint (oC) Not expected to self ignite; Not highly flammable CA3 -
Octanol-water partition coefficient at pH 7, 20oC P 3.98 X 1001 Calculated -
Log P 1.6 F3 Low
Bulk density (g ml-1)/Specific gravity 2.8 F3 -
Dissociation constant (pKa) at 25oC - - -
Note:
Vapour pressure at 25oC (mPa) 166100000 Q3 Volatile
Henry's law constant at 25oC (Pa m3 mol-1) - - -
Henry's law constant at 20oC (dimensionless) 6.82 X 10-01 Calculated Volatile
GUS leaching potential index - - -
SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate Value - - -
Note -
Potential for particle bound transport index - - -
Maximum UV-vis absorption L mol-1 cm-1 - - -
Surface tension (mN m-1) - - -

Degradation:
Property Value Source/Quality Score/Other Information Interpretation
Soil degradation (days) (aerobic) DT50 (typical) - - -
DT50 (lab at 20oC) - - -
DT50 (field) - - -
DT90 (lab at 20oC) - - -
DT90 (field) - - -
Note: -
Plant matrix DT50 (days) 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 Value Source/Quality Score/Other Information Interpretation
Linear Kd - Q2 Moderately mobile
Koc 155
Notes and range Estimated
Freundlich Kf - - -
Kfoc -
1/n -
Notes and range -
pH sensitivity -


ECOTOXICOLOGY

for iodomethane

Property Value Source/Quality Score/Other Information Interpretation
Bio-concentration factor BCF (l kg-1) Low risk Q3 Based on LogP < 3 Low potential
CT50 (days) - -
Mammals - Acute oral LD50 (mg kg-1) > 79.8 F3 Rat High
Mammals - Short term dietary NOEL (mg kg-1) - - -
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) > 40.0 F4 Colinus viriginianus High
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) > 1.12 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 Contact acute 48 hour LD50 (μg bee-1) - - -
Oral acute 48 hour LD50 (μg bee-1) - - -
Unknown mode acute 48 hour LD50 (μg bee-1) - - -
Earthworms - Acute 14 day LC50 (mg kg-1) - - -
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 iodomethane

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) > 79.8 F3 Rat High
Mammals - Dermal LD50 (mg kg-1 body weight) > 2000 F3 Rat -
Mammals - Inhalation LC50 (mg l-1) 4.0 F3 Rat -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) - - -
ARfD - Acute Reference Dose (mg kg-1bw day-1) - - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) - - -
Dermal penetration studies (%) - - -
Dangerous Substances Directive 76/464 - - -
Exposure Limits [LT TLV: 10 mg/l air] Q3 -
Exposure Routes Public -
Occupational May be absorbed by the skin
European MRLs Click here for the EU MRL pesticide database
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 Toxic
May damage corneal
Exposure may cause skin rash, running nose, headache and irritation of the mucous membrane

: 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 Corrosive
Methyl iodide gases may be generated
CLP classification 2013 -
EC Risk Classification Carcinogen category 3: R40
T - Toxic: R23, R25
Xn - Harmful: R21
Xi - Irritant: R37, R38
EC Safety Classification S36, S37, S38, S45
WHO Classification NL - Not listed
US EPA Classification (formulation) - -
UN Number -
Waste disposal & packaging -


TRANSLATIONS

for iodomethane

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

Record last updated: Friday 20 November 2015
Contact: aeru@herts.ac.uk