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Insecticides and acaricides

Pirimiphos-methyl

Also known as Pirimiphos methyl, Pyrimiphos methyl, Pirimifosmethyl

CAS 29232-93-7Formula C11H20N3O3PSMolar mass 305.34 g/molEC 249-528-5
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard, Hazardous to the environment 28 suppliers listed
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Pirimiphos-methyl chemical structure, C11H20N3O3PS, CAS 29232-93-7
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Straw-colored liquid
Melting point
15 to 18
Boiling point
Decomposes on distillation
Density
1.17 at 20 °C
Solubility
In water (mg/L at 20 °C): 11 (pH 5), 10 (pH 7), 9.7 (pH 9)
HS code
293359
Category
Insecticides and acaricides
UN number
UN 3082
Illustrative photo, closed blue steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Pirimiphos-methyl?

Plain description, key identifiers and synonyms

Pirimiphos-methyl is an organic thiophosphate that is O,O-dimethyl O-pyrimidin-4-yl phosphorothioate substituted by a methyl group at position 6 and a diethylamino group at position 2. It has a role as an acaricide, an insecticide, an agrochemical, an EC 3.1.1.7 (acetylcholinesterase) inhibitor and an environmental contaminant. It is an organic thiophosphate and an aminopyrimidine. It is functionally related to a 2-diethylamino-6-methylpyrimidin-4(1H)-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-dimethoxyphosphinothioyloxy-N,N-diethyl-6-methylpyrimidin-2-amine
CAS number
29232-93-7 CAS number cross-checked
EC number
249-528-5
Molecular formula
C11H20N3O3PS
UNII
2VQZ4PK548
InChIKey
QHOQHJPRIBSPCY-UHFFFAOYSA-N
InChI
InChI=1S/C11H20N3O3PS/c1-6-14(7-2)11-12-9(3)8-10(13-11)17-18(19,15-4)16-5/h8H,6-7H2,1-5H3
SMILES (canonical and isomeric)
CCN(CC)C1=NC(=CC(=N1)OP(=S)(OC)OC)C

Synonyms

  • Pirimiphos methyl
  • Pyrimiphos methyl
  • Pirimifosmethyl
  • Actellifog
  • Actelic
  • Silosan
  • pirimiphosmethyl
  • Methylpirimiphos
  • BLEX
  • Pyridimine phosphate
  • Aktellik
  • Sybol 2
  • Aktelik
  • Plant protection PP511
  • Fosforan pirimidyny
  • OMS 1424
  • 2-Diethylamino-6-methylpyrimidin-4-yl dimethyl phosphorothionate
  • O-(2-(Diethylamino)-6-methyl-4-pyrimidinyl)-O,O-dimethyl phosphorothioate
  • O-(2-(diethylamino)-6-methylpyrimidin-4-yl) O,O-dimethyl phosphorothioate
  • O-[2-(diethylamino)-6-methylpyrimidin-4-yl] O,O-dimethyl phosphorothioate
  • o-2-(Diethylamino)-6-methylpyrimidin-4-yl O,O-dimethyl phosphorothioate
  • O-(2-(diethylamino)-6-methyl-4-pyrimidinyl) O,O-dimethylphosphorothioate lic
  • Actellic
  • Pyrimiphos-methyl
  • ENT 27699GC
Show all 37 synonyms
  • Pirimiphos-methyl, 90%
  • PP 511
  • 4-dimethoxyphosphinothioyloxy-N,N-diethyl-6-methylpyrimidin-2-amine
  • O-(2-Diethylamino-6-methylpyrimidin-4-yl) O,O-dimethyl phosphorothioate
  • Aktel
  • Pirimiphos-methyl solution
  • O-[2-(diethylamino)-6-methylpyrimidin-4-yl] O,O-dimethyl thiophosphate
  • Phosphorothioic acid, O-[2-(diethylamino)-6-methyl-4-pyrimidinyl] O,O-dimethyl ester
  • Piritione
  • 2-Diethylamino-6-methylpyrimidine-4-yl dimethyl phosphorothionate
  • Primiphos-methyl
  • Phosphorothioic acid, O-(2-(diethylamino)-6-methyl-4-pyrimidinyl) O,O-dimethyl ester

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
Straw-colored liquidexp.
Melting point
15 to 18exp.
Boiling point
Decomposes on distillationexp.
Density
1.17 at 20 °Cexp.
Solubility
In water (mg/L at 20 °C): 11 (pH 5), 10 (pH 7), 9.7 (pH 9)exp.
Vapour pressure
2 mPa (1.50 × 10⁻⁵ mg Hg) at 20 °C, 6.9 mPa (5.17 × 10⁻⁵ mm Hg)) at 30 °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
305.34 g/molcalc.
Exact mass
305.0963 Dacalc.
LogP (octanol/water)
2.53calc.
Topological polar surface area
56.71 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
7calc.
Rotatable bonds
7calc.
Heavy atoms
19calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.64calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1cncnc1

c1cncnc1

1 ring, 6 atoms, the Pyrimidine ring system.

18,999 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H372Causes damage to organs through prolonged or repeated exposure.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (9)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P301 + P317If swallowed: Get medical help.
  • P319Get medical help if you feel unwell.
  • P330Rinse mouth.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3082

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

Pirimiphos-methyl suppliers

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All 28 suppliers
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Where suppliers are based

28 suppliers in 9 countries

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Pirimiphos-methyl price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Control of a wide range of insects and mites in warehouses, stored grain, animal houses, domestic and industrial premises, chewing insects, sucking insect, boring insects, and mites on vegetables, ornamentals, bulb flowers, sugar cane, maize, sorghum, rice, citrus and other fruit, olives, vines, alfalfa, cereals, etc., and glasshouse pests (especially Whitefly, Thrips, Mealybugs, Aphids and mites) on tomatoes, cucumbers, capsicums, aubergines and other glasshouse crops.

Use classes: Pesticides, Acaricides, Insecticides.

Pharmacological actions

  • Insecticides

Roles

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

Functional uses

  • Biocide

How it is made

Pirimiphos-methyl is produced by reaction of diethylamine with cyanamide, ethyl acetoacetate and O,O-dimethyl phosphorochloridothioate, i.e., nitrile addition, condensation, and dehydrochlorination reactions.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 015-134-00-5

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Pirimiphos-methyl is traded under.

HS 2933.59Indicative HS code

Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring, other

World exports in 2024
$18.4B
+10.5% vs 2023, imports $24.8B
2019 to 2024
Top exporters
  1. Ireland43.6%
  2. Switzerland * partner reported26.3%
  3. China7.9%
Top importers
  1. Slovenia30.3%
  2. United States30.1%
  3. Germany15.3%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Pirimiphos-methyl, based on the data on this page

What is Pirimiphos-methyl?

Pirimiphos-methyl is an organic thiophosphate that is O,O-dimethyl O-pyrimidin-4-yl phosphorothioate substituted by a methyl group at position 6 and a diethylamino group at position 2.

What is the CAS number of Pirimiphos-methyl?

The CAS registry number of Pirimiphos-methyl is 29232-93-7.

What is the molecular formula and weight of Pirimiphos-methyl?

The molecular formula of Pirimiphos-methyl is C11H20N3O3PS and its molar mass is 305.34 g/mol.

What is Pirimiphos-methyl used for?

Control of a wide range of insects and mites in warehouses, stored grain, animal houses, domestic and industrial premises, chewing insects, sucking insect, boring insects, and mites on vegetables, ornamentals, bulb flowers, sugar cane, maize, sorghum, rice, citrus and other fruit, olives, vines, alfalfa, cereals, etc.…

Is Pirimiphos-methyl hazardous?

Pirimiphos-methyl carries the GHS signal word "Danger". Main hazards: harmful if swallowed, causes damage to organs through prolonged or repeated exposure, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Pirimiphos-methyl?

Pirimiphos-methyl is usually classified under HS code 293359 (Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Pirimiphos-methyl?

CompoundList lists 28 suppliers of Pirimiphos-methyl in China, Brazil, United States, Colombia and 5 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Pirimiphos-methyl in India?

1 supplier in India list Pirimiphos-methyl on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Pirimiphos-methyl?

Suppliers quote Pirimiphos-methyl on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Pirimiphos-methyl

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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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