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Insecticides and acaricides

Diazinon

Also known as Dimpylate, Oleodiazinon, Neocidol

CAS 333-41-5Formula C12H21N2O3PSMolar mass 304.35 g/molEC 206-373-8
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 81 suppliers listed
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Diazinon chemical structure, C12H21N2O3PS, CAS 333-41-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless oil
Boiling point
>120
Density
1.116-1.118 at 20 ยฐC/4 ยฐC
Flash point
104.4 ยฐC
Solubility
Solubility in water: 0.004% at 20 ยฐC
HS code
293359
Category
Insecticides and acaricides
UN number
UN 3018
Illustrative photo, clear liquid in sealed glass ampoules on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Diazinon?

Plain description, key identifiers and synonyms

Diazinon is a member of the class of pyrimidines that is pyrimidine carrying an isopropyl group at position 2, a methyl group at position 6 and a (diethoxyphosphorothioyl)oxy group at position 4. It has a role as an acaricide, a nematicide, an agrochemical, a xenobiotic, an EC 3.1.1.8 (cholinesterase) inhibitor, an EC 3.1.1.7 (acetylcholinesterase) inhibitor and an environmental contaminant. It is an organic thiophosphate and a member of pyrimidines. It is functionally related to a 2-isopropyl-6-methylpyrimidin-4-ol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
diethoxy-(6-methyl-2-propan-2-ylpyrimidin-4-yl)oxy-sulfanylidene-ฮป5-phosphane
CAS number
333-41-5 CAS number cross-checked
EC number
206-373-8
Molecular formula
C12H21N2O3PS
UNII
YUS1M1Q929
MDL number
MFCD00036204
InChIKey
FHIVAFMUCKRCQO-UHFFFAOYSA-N
InChI
InChI=1S/C12H21N2O3PS/c1-6-15-18(19,16-7-2)17-11-8-10(5)13-12(14-11)9(3)4/h8-9H,6-7H2,1-5H3
SMILES (canonical and isomeric)
CCOP(=S)(OCC)OC1=NC(=NC(=C1)C)C(C)C

Synonyms

  • Dimpylate
  • Oleodiazinon
  • Neocidol
  • Ciazinon
  • Diazinone
  • Diazitol
  • Spectracide
  • Basudin
  • Nucidol
  • Sarolex
  • Antigal
  • Bazuden
  • Dacutox
  • Dassitox
  • Diazide
  • Ektoband
  • Flytrol
  • Galesan
  • Nedcidol
  • Dazzel
  • Diazol
  • Dicid
  • Exodin
  • Alfa-tox
  • Diazajet
Show all 39 synonyms
  • Dimpylat
  • Garden Tox
  • Bassadinon
  • Drawizon
  • Kayazinon
  • Meodinon
  • Terminator
  • Compass
  • Disonex
  • Dizinon
  • Kayazol
  • Nipsan
  • Dyzol
  • Diazinon ag 500

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
Colorless oilexp.
Odour
Faint ester-like odorexp.
Boiling point
>120exp.
Density
1.116-1.118 at 20 ยฐC/4 ยฐCexp.
Flash point
104.4 ยฐCexp.
Autoignition temperature
>400exp.
Solubility
Solubility in water: 0.004% at 20 ยฐCexp.
Vapour pressure
9.01 ร— 10โปโต mm Hg at 25 ยฐCexp.

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
304.35 g/molcalc.
Exact mass
304.1011 Dacalc.
LogP (octanol/water)
3.58calc.
Topological polar surface area
53.47 ร…ยฒcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
6calc.
Rotatable bonds
7calc.
Heavy atoms
19calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.67calc.
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
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (7)
  • 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.
  • P330Rinse mouth.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3018
Transport hazard class
6.1
Packing group
III

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

Diazinon suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 81 suppliers
30 of 30 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

81 suppliers in 16 countries

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Diazinon 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

Commercial agriculture products (excluding cattle ear tags) are restricted use due to avian and aquatic toxicity.

Diazinon is registered to control foliage and soil insects and pests of many fruit, nut, vegetable, and ornamental crops. Diazinon also is used in cattle eartags. All residential uses have been cancelled.

Insecticide, nematicide, seed treatment/protectant.

Veterinary medication:.

Use classes: Organophosphates and carbamates, Insecticides, Pesticides, Repellents, Veterinary substances, Acaricides, Insecticides.

Pharmacological actions

  • Cholinesterase Inhibitors
  • Insecticides

Roles

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

Functional uses

  • Biocide

Pharmacology

Dimpylate is a synthetic organophosphate acetylcholinesterase inhibitor and neurotoxicant that is used as a pesticide. It is characterized as a colorless to dark brown odorless liquid, and exposure occurs by inhalation, ingestion, or contact.

How it is made

Diazinon is produced by condensation of isobutyramidine with acetoacetate to yield the intermediate 2-isopropyl-4-methylpyrimidine, which is transformed into the final product by treatment with diethylthiophosphoric acid.

Reaction of 2-isopropyl-4-hydroxy-6-methyl-pyrimidine & o,o-diethyl phosphorochloridothioate.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 015-040-00-4

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Diazinon 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 Diazinon is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Diazinon?

Diazinon is a member of the class of pyrimidines that is pyrimidine carrying an isopropyl group at position 2, a methyl group at position 6 and a (diethoxyphosphorothioyl)oxy group at position 4.

What is the CAS number of Diazinon?

The CAS registry number of Diazinon is 333-41-5.

What is the molecular formula and weight of Diazinon?

The molecular formula of Diazinon is C12H21N2O3PS and its molar mass is 304.35 g/mol.

What is Diazinon used for?

Commercial agriculture products (excluding cattle ear tags) are restricted use due to avian and aquatic toxicity. Diazinon is registered to control foliage and soil insects and pests of many fruit, nut, vegetable, and ornamental crops. Diazinon also is used in cattle eartags. All residential uses have been cancelled.

Is Diazinon hazardous?

Diazinon carries the GHS signal word "Warning". Main hazards: harmful 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 Diazinon?

Diazinon is usually classified under HS code 293359 (Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ringโ€ฆ). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Diazinon?

CompoundList lists 81 suppliers of Diazinon in China, United States, Germany, India and 12 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Diazinon in India?

3 suppliers in India list Diazinon on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Diazinon?

Suppliers quote Diazinon 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 Diazinon

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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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