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Insecticides and acaricides

Methomyl

Also known as methyl N-(methylcarbamoyloxy)ethanimidothioate, Ethanimidothioic acid, N-[[(methylamino)carbonyl]oxy]-, methyl ester, Methavin

CAS 16752-77-5Formula C5H10N2O2SMolar mass 162.21 g/molEC 240-815-0
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Hazardous to the environment Controlled, licensed buyers only
Request as a licensed buyer Safety data
Methomyl chemical structure, C5H10N2O2S, CAS 16752-77-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White crystalline solid
Melting point
78 to 79
Boiling point
335 °C
Density
1.3 g/cm³
Solubility
Sol at 25 °C in wt/wt percent: water 5.8, ethanol 42, methanol 100, isopropanol 22, acet…
HS code
293020
Category
Insecticides and acaricides
UN number
UN 2757

What is Methomyl?

Plain description, key identifiers and synonyms

Methomyl is a synthetic carbamate ester, aryl sulfide compound, and acetylcholinesterase inhibitor that is used as a pesticide. It is characterized as a highly toxic, white crystalline solid with a slight sulfurous odor, and exposure occurs by inhalation, ingestion, or contact.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
methyl N-(methylcarbamoyloxy)ethanimidothioate
CAS number
16752-77-5 CAS number cross-checked
EC number
240-815-0
Molecular formula
C5H10N2O2S
MDL number
MFCD00055451
InChIKey
UHXUZOCRWCRNSJ-UHFFFAOYSA-N
InChI
InChI=1S/C5H10N2O2S/c1-4(10-3)7-9-5(8)6-2/h1-3H3,(H,6,8)
SMILES (canonical and isomeric)
CC(=NOC(=O)NC)SC

Synonyms

  • methyl N-(methylcarbamoyloxy)ethanimidothioate
  • Ethanimidothioic acid, N-[[(methylamino)carbonyl]oxy]-, methyl ester
  • Methavin
  • Methyl N-(((methylamino)carbonyl)oxy)ethanimidothioate
  • Methyl O-(methylcarbamoyl)thiolacethohydroxamate
  • Methyl N-[[(methylamino)carbonyl]oxy]ethanimidothioate
  • Ethanimidothioic acid, N-(((methylamino)carbonyl)oxy)-, methyl ester
  • s-methyl-n-(methylcarbamoyloxy)thioacetimidate
  • Methyl N-((methylamino)carbonyl)oxy)ethanimidothioate
  • 1-(Methylthio)acetaldehyde O-methylcarbamoyloxime
  • 1-(Methylthio)ethylideneamino methylcarbamate
  • 2-Methylthio-acetaldehyd-O-(methylcarbamoyl)-oxim
  • 3-Thiabutan-2-one, O-(methylcarbamoyl)oxime
  • Acetimidothioic acid, methyl-, N-(methylcarbamoyl) ester
  • Du Pont 1179
  • Du Pont Insecticide 1179
  • Dupont 1179
  • Insecticide 1,179
  • Insecticide 1179
  • Lannate
  • Lannate L
  • Lanox 216
  • Lanox 90
  • Mesomile
  • Methomex
Show all 37 synonyms
  • Methomyl lannate
  • Methyl N-((methylcarbamoyl)oxy)thioacetimidate
  • Methyl O-(methylcarbamoyl)thiolacetohydroxamate
  • Methyl O-(methylcarbamyl)thiolacetohydroxamate
  • Metomil
  • N-(((Methylamino)carbonyl)oxy)ethanimidothioic acid methyl ester
  • N-((Methylcarbamoyl)oxy)thioacetimidic acid methyl ester
  • Nudrin
  • S-Methyl N-(methylcarbamoyloxy)thioacetimidate
  • S-methyl N-[(methylcarbamoyl)oxy]thioacetimidate
  • SD 14999
  • WL 18236

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
White crystalline solidexp.
Odour
Slightly sulfurousexp.
Melting point
78 to 79exp.
Boiling point
335 °Cexp.
Density
1.3 g/cm³exp.
Solubility
Sol at 25 °C in wt/wt percent: water 5.8, ethanol 42, methanol 100, isopropanol 22, acetone 73exp.
Vapour pressure
5.4 × 10⁻⁶ mm Hg @ 25 °Cexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
162.21 g/molcalc.
Exact mass
162.0463 Dacalc.
LogP (octanol/water)
1.04calc.
Topological polar surface area
50.69 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
1calc.
Heavy atoms
10calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.6calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H300Fatal if swallowed.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (9)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P391Collect spillage.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2757
Transport hazard class
6.1
Packing group
II

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Methomyl suppliers

Controlled substance, listings of documented suppliers only, in the documented ranking

Pesticide toxic

Methomyl is controlled. Only documented suppliers can list it, and buyers must upload a valid licence with their request. Every request is reviewed before suppliers see it.

Methomyl

Reference: Highly hazardous pesticide, WHO class Ia or Ib

Our policy on controlled substances
No documented supplier lists it yet

Licensed buyers can post a request for Methomyl with their licence. Our compliance team reviews it before suppliers see it.

Request as a licensed buyer

Methomyl price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Nematocide.

Insecticide on vegetables, tobacco, cotton, alfalfa, soybeans, & corn.

Control of a wide range of insects and spider mites in fruit, vegetables, olives, hops, vines, ornamentals, field crops, flax, cotton, tobacco, soy beans, etc...

Is broad spectrum insecticide registered on several agricultural crops & commercially grown ornamental plants, primarily against lepidopterous insects on cole crops, tobacco, lettuce, cotton, & tomatoes.

Use classes: Insecticides.

Pharmacological actions

  • Cholinesterase Inhibitors
  • Insecticides

Roles

  • acaricide
  • agrochemical
  • environmental contaminant
  • enzyme inhibitor
  • insecticide
  • nematicide
  • pesticide
  • xenobiotic

Functional uses

  • Biocide

How it is made

Reaction of methyl thiomethyl oxime & methyl isocyanate

Regulatory status

Inventories, regulations and trade controls that list this substance

Pesticide toxic

Methomyl is controlled. Only documented suppliers can list it, and buyers must upload a valid licence with their request. Every request is reviewed before suppliers see it.

Methomyl

Reference: Highly hazardous pesticide, WHO class Ia or Ib

Our policy on controlled substances

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 006-045-00-2

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Methomyl is traded under.

HS 2930.20Indicative HS code

Thiocarbamates and dithiocarbamates

World exports in 2024
$377M
−5.5% vs 2023, imports $372M
2019 to 2024
Top exporters
  1. China49.2%
  2. Germany11.2%
  3. Japan9.7%
Top importers
  1. India * partner reported12.2%
  2. Australia12.1%
  3. United States7.1%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Methomyl is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Methomyl, based on the data on this page

What is Methomyl?

Methomyl is a synthetic carbamate ester, aryl sulfide compound, and acetylcholinesterase inhibitor that is used as a pesticide. It is characterized as a highly toxic, white crystalline solid with a slight sulfurous odor, and exposure occurs by inhalation, ingestion, or contact.

What is the CAS number of Methomyl?

The CAS registry number of Methomyl is 16752-77-5.

What is the molecular formula and weight of Methomyl?

The molecular formula of Methomyl is C5H10N2O2S and its molar mass is 162.21 g/mol.

What is Methomyl used for?

Nematocide. Insecticide on vegetables, tobacco, cotton, alfalfa, soybeans, & corn. Control of a wide range of insects and spider mites in fruit, vegetables, olives, hops, vines, ornamentals, field crops, flax, cotton, tobacco, soy beans, etc...

Is Methomyl hazardous?

Methomyl carries the GHS signal word "Danger". Main hazards: fatal if swallowed, very toxic to aquatic life, very toxic to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Methomyl?

Methomyl is usually classified under HS code 293020 (Thiocarbamates and dithiocarbamates). This is indicative, confirm it with your customs broker before shipping.

Can I buy Methomyl on CompoundList?

Methomyl is a controlled substance. Only documented suppliers can list it, and buyers must upload a valid licence with their request. Every request is reviewed by our compliance team before suppliers see it.

Guides for buyers

Practical guides that help when you source, ship or handle Methomyl

Request as a licensed buyer

Upload your licence with the request. Our compliance team reviews it before the documented suppliers see it.
Request as a licensed buyer
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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