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Insecticides and acaricides

Dichlone

Also known as 2,3-Dichloro-1,4-naphthoquinone, Phygon, Diclone

CAS 117-80-6Formula C10H4Cl2O2Molar mass 227.05 g/molEC 204-210-5
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 21 suppliers listed
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Dichlone chemical structure, C10H4Cl2O2, CAS 117-80-6
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Golden yellow needles or leaflets from alcohol
Melting point
195 °C
Boiling point
275 °C
Solubility
In water, 8.0 mg/L, water buffered to pH 7.4. /Temp not specified/
HS code
291479
Category
Insecticides and acaricides
UN number
UN 2902
Illustrative photo, yellow pigment powder in an open kraft paper sack in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Dichlone?

Plain description, key identifiers and synonyms

Dichlone is a yellow crystalline solid dissolved in a water-emulsifiable liquid carrier. Can cause illness by inhalation, skin absorption and/or ingestion. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Can easily penetrate the soil and contaminate groundwater and nearby streams. Used as a fungicide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,3-dichloronaphthalene-1,4-dione
CAS number
117-80-6 CAS number cross-checked
EC number
204-210-5
Molecular formula
C10H4Cl2O2
UNII
C28BKZ2J9A
MDL number
MFCD00001677
InChIKey
SVPKNMBRVBMTLB-UHFFFAOYSA-N
InChI
InChI=1S/C10H4Cl2O2/c11-7-8(12)10(14)6-4-2-1-3-5(6)9(7)13/h1-4H
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)C(=O)C(=C(C2=O)Cl)Cl

Synonyms

  • 2,3-Dichloro-1,4-naphthoquinone
  • Phygon
  • Diclone
  • 2,3-Dichloronaphthoquinone
  • Phygon XL
  • Algistat
  • Sanquinon
  • Uniroyal
  • Phygon paste
  • Dichloronaphthoquinone
  • Quintar
  • 1,4-Naphthalenedione, 2,3-dichloro-
  • Compound 604
  • Phygon seed protectant
  • 2,3-Dichloro-1,4-naphthalenedione
  • U.s. rubber 604
  • Quintar 540F
  • USR 604
  • 2,3-Dichloro-1,4-naphthaquinone
  • US Rubber 604
  • Latka 604
  • ENT 3,776
  • 1,4-Naphthoquinone, 2,3-dichloro-
  • 2,3-Dichlor-1,4-naphthochinon
  • 2,3-dichloronaphthalene-1,4-dione
Show all 34 synonyms
  • Dichlon
  • 2,3-dichloro-1,4-dihydronaphthalene-1,4-dione
  • 2,3-Dichlor-1,4-naftochinon
  • CNQ
  • 2,3-Dichloronaphthoquinone-1,4
  • 2,3-Dichloro-alpha-naphthoquinone
  • C10H4Cl2O2
  • 2,?3-?Dichloro-?1,?4-?naphthoquinone
  • 2,4-naphthochinon

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
Golden yellow needles or leaflets from alcoholexp.
Melting point
195 °Cexp.
Boiling point
275 °Cexp.
Solubility
In water, 8.0 mg/L, water buffered to pH 7.4. /Temp not specified/exp.
Vapour pressure
1.1 × 10⁻⁶ mm Hg at 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
227.05 g/molcalc.
Exact mass
225.9588 Dacalc.
LogP (octanol/water)
2.75calc.
Topological polar surface area
34.14 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
14calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
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, O=C1C=CC(=O)c2ccccc21

O=C1C=CC(=O)c2ccccc21

2 rings, 12 atoms, the 1,4-Naphthoquinone ring system.

875 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.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (15)
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2902

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

Dichlone suppliers

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

All 21 suppliers
21 of 21 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

21 suppliers in 6 countries

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Dichlone price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

The active ingredient is no longer contained in any registered products. ... "cancelled.".

Seed disinfectant, fungicide for foliage and textiles, insecticide (Former).

Organic catalyst.

Use classes: Fungicides.

Functional uses

  • Biocide

How it is made

Oxidation of 4-hydroxynaphthalene-1-sulfonic acid with potassium chlorate in hydrochloric acid

Chlorination of 1,4-naphthoquinone, ... Sjostrand, US patent 2975196 (1961 to Svenska Oljeslageri Aktiebolaget), by oxidation of 2,3-dichloro-5,8-dihydro-1,4-naphthohydroquinone: Gaertner, US patent 2750427 (1956 to Monsanto), by oxidation of 2,3-dichloro-p-benzoquinone.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 606-018-00-0

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 Dichlone is traded under.

HS 2914.79Indicative HS code

Halogenated, sulphonated, nitrated or nitrosated derivatives, other

World exports in 2024
$558M
−12.1% vs 2023, imports $608M
2019 to 2024
Top exporters
  1. China41.2%
  2. India * partner reported28.7%
  3. Germany16.7%
Top importers
  1. United States29.1%
  2. Italy9.9%
  3. Switzerland * partner reported8.8%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Dichlone?

Dichlone is a yellow crystalline solid dissolved in a water-emulsifiable liquid carrier. Can cause illness by inhalation, skin absorption and/or ingestion. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment.

What is the CAS number of Dichlone?

The CAS registry number of Dichlone is 117-80-6.

What is the molecular formula and weight of Dichlone?

The molecular formula of Dichlone is C10H4Cl2O2 and its molar mass is 227.05 g/mol.

What is Dichlone used for?

The active ingredient is no longer contained in any registered products. ... "cancelled.". Seed disinfectant, fungicide for foliage and textiles, insecticide (Former). Organic catalyst. Use classes: Fungicides.

Is Dichlone hazardous?

Dichlone carries the GHS signal word "Warning". Main hazards: harmful if swallowed, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Dichlone?

Dichlone is usually classified under HS code 291479 (Halogenated, sulphonated, nitrated or nitrosated derivatives, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Dichlone?

CompoundList lists 21 suppliers of Dichlone in China, India, Canada, Switzerland and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Dichlone in India?

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

What is the price of Dichlone?

Suppliers quote Dichlone 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 Dichlone

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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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