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Insecticides and acaricides

Phosalone

Also known as Phosalon, Azofene, Rubitox

CAS 2310-17-0Formula C12H15ClNO4PS2Molar mass 367.82 g/molEC 218-996-2
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Hazardous to the environment 4 suppliers listed
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Phosalone chemical structure, C12H15ClNO4PS2, CAS 2310-17-0
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Crystals
Melting point
47.5 to 48
Density
1.338 g/mL at 20 °C
Flash point
100 °C
Solubility
In water, 3.05mg/L at 25 °C
HS code
293499
Category
Insecticides and acaricides
UN number
UN 2783
Illustrative photo, a shrink wrapped pallet of kraft paper sacks in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Phosalone?

Plain description, key identifiers and synonyms

Phosalone is a member of the class of 1,3-benzoxazoles carrying a [(diethoxyphosphorothioyl)sulfanyl]methyl group at the nitrogen atom, an oxo group at position 2 and a chloro group at position 6. It is an organothiophosphate insecticide. It has a role as an acaricide, an agrochemical, an EC 3.1.1.8 (cholinesterase) inhibitor and an EC 3.1.1.7 (acetylcholinesterase) inhibitor. It is a carbamate ester, an organochlorine insecticide, an organothiophosphate insecticide and a member of 1,3-benzoxazoles.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
6-chloro-3-(diethoxyphosphinothioylsulfanylmethyl)-1,3-benzoxazol-2-one
CAS number
2310-17-0 CAS number cross-checked
EC number
218-996-2
Molecular formula
C12H15ClNO4PS2
UNII
448B85HT8M
MDL number
MFCD00055499
InChIKey
IOUNQDKNJZEDEP-UHFFFAOYSA-N
InChI
InChI=1S/C12H15ClNO4PS2/c1-3-16-19(20,17-4-2)21-8-14-10-6-5-9(13)7-11(10)18-12(14)15/h5-7H,3-4,8H2,1-2H3
SMILES (canonical and isomeric)
CCOP(=S)(OCC)SCN1C2=C(C=C(C=C2)Cl)OC1=O

Synonyms

  • Phosalon
  • Azofene
  • Rubitox
  • Benzophosphate
  • Phozalon
  • Fosalon
  • Fozalon
  • Zolone PM
  • Benzphos
  • Zone
  • Zolone DT
  • Chipman 11974
  • Agria 1060
  • Rhodia RP 11974
  • Phosalone 35 EC
  • Phasolon
  • Zoolon
  • Niagara 9241
  • 6-chloro-3-(diethoxyphosphinothioylsulfanylmethyl)-1,3-benzoxazol-2-one
  • 11 974 rp
  • ENT 27,163
  • RP 11,974
  • Phosphorodithioic acid, O,O-diethyl ester, S-ester with 6-chloro-3-(mercaptomethyl)-2-benzoxazolinone
  • S-(6-Chloro-2-oxobenzoxazolin-3-yl)methyl diethyl phosphorothiolothionate
  • 3-Diethyldithiophosphorylmethyl-6-chlorobenzoxazolone-2
Show all 39 synonyms
  • S-((6-Chloro-2-oxo-3(2H)-benzoxazolyl)methyl) O,O-diethyl phosphorodithioate
  • S-6-Chloro-2,3-dihydro-2-oxo-1,3-benzoxazol-3-ylmethyl O,O-diethyl phosphorodithioate
  • 3-(O,O-Diethyldithiophosphorylmethyl)-6-chlorobenzoxazolone
  • 6-Chloro-3-(O,O-diethyldithiophosphorylmethyl)benzoxazolone
  • 3-(O,O-Diethyldithiophosphorylmethyl)-6-chlorobenzoxazolinone
  • O,O-Diethyl-S-(6-chlorobenzoxazonyl-3-methyl) dithiophosphate
  • O,O-Diethyl S-(6-chlorobenzoxazolinyl-3-methyl) dithiophosphate
  • 6-Chloro-3-diethoxyphosphinothioylthiomethyl-1,3-benzoxazol-2(3H)-one
  • O,O-Diethyl-S-(6-chloro-2-oxobenzoxazolin-3-yl-methyl)-phosphorodithioate
  • 3-(6-Chloro-2-oxobenzoxazolin-3-yl)methyl-O,O-diethyl phosphorothiolothionate
  • O,O-Diethyl-S-(6-chloro-2-oxo-benzoxazolin-3-yl)methyl-phosphorothiolothionate
  • Phosphorodithioic acid-S-ester of 6-chloro-3-mercaptomethylbenzoxazyol-2-one
  • S-((3-Benzoxazolinyl-6-chloro-2-oxo)methyl) O,O-diethyl phosphorodithioate
  • S-(6-Chloro-3-(mercaptomethyl)-2-benzoxazolinone) O,O-diethyl phosphorodithioate

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
Crystalsexp.
Odour
Garlicexp.
Melting point
47.5 to 48exp.
Density
1.338 g/mL at 20 °Cexp.
Flash point
100 °Cexp.
Solubility
In water, 3.05mg/L at 25 °Cexp.
Vapour pressure
Vapor pressure at 25 °C: negligibleexp.

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
367.82 g/molcalc.
Exact mass
366.9869 Dacalc.
LogP (octanol/water)
4.24calc.
Topological polar surface area
53.6 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
6calc.
Rotatable bonds
7calc.
Heavy atoms
21calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.42calc.
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=c1[nH]c2ccccc2o1

O=c1[nH]c2ccccc2o1

2 rings, 10 atoms, the 2(3H)-Benzoxazolone ring system.

958 other chemicals share this scaffold

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

  • H301Toxic if swallowed.
  • H312Harmful in contact with skin.
  • H317May cause an allergic skin reaction.
  • H332Harmful if inhaled.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (18)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2783
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

Phosalone suppliers

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

All 4 suppliers
4 of 4 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

4 suppliers in 4 countries

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Phosalone 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 pesticide products ... "cancelled.".

An insecticide/acaricide, phosalone is used to control various insect species in/on almonds, apples, apricots, cherries, grapes, peaches, pears, and plums in Algeria, Austria, Belgium, Canada, Croatia, Czech Republic, France, Greece, Hungary, Iraq, Italy, Japan, Kuwait, Morocco, Poland, Portugal, Russia, Slovak Republic, Spain, Switzerland, Taiwan, Tunisia, Turkey, and Ukraine. It is not registered under FIFRA and may not be sold, distributed, or used in the U.S. Nine import tolerances are established for residues of phosaone in/on imported almonds, apples, apricots, cherries, grapes, peaches, pears, and plums. It is estimated that less than 1.5% of the apples (fresh and dried), 0.1% of pears, 0.05% of peaches, and 0.2% of plums available in the U.S.

Read more

are imported from countries with phosalone registrations. Total imports treated with phosalone is approximately 13.0 %, 6.0 % of which is from apple juice.

U.S.: Not registered for use. Import tolerance review underway. OUTSIDE U.S.: Control of aphids, codling moth, cotton bollworm, mango hoppers, mites, psylla, rice hispa, rice leaf and planthoppers, stem borers, thrips, etc.

Use classes: Insecticides, Acaricides, Insecticides.

Pharmacological actions

  • Cholinesterase Inhibitors
  • Insecticides

Roles

  • acaricide
  • agrochemical
  • enzyme inhibitor
  • pesticide

Functional uses

  • Biocide

How it is made

Phosalone is produced by treating O,O-diethyldithiophosphoric acid with N-chloromethyl-5-chlorobenzoxazolone.

Reaction of 6-chloro-3-(chloromethyl)benzoxazolone with metal salt of phosphorodithioic acid

Produced by the condensation of sodium O,O-diethyl phosphorodithioate with 6-chloro-3-chloromethyl-3H-benzoxazol-2-one, the latter being obtained by the interaction of urea with 2-aminophenol to give 3H-benzoxazol-2-one which is chlorinated to give the 6-chloro analog...

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 015-067-00-1

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Phosalone?

Phosalone is a member of the class of 1,3-benzoxazoles carrying a [(diethoxyphosphorothioyl)sulfanyl]methyl group at the nitrogen atom, an oxo group at position 2 and a chloro group at position 6. It is an organothiophosphate insecticide.

What is the CAS number of Phosalone?

The CAS registry number of Phosalone is 2310-17-0.

What is the molecular formula and weight of Phosalone?

The molecular formula of Phosalone is C12H15ClNO4PS2 and its molar mass is 367.82 g/mol.

What is Phosalone used for?

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

Is Phosalone hazardous?

Phosalone carries the GHS signal word "Danger". Main hazards: toxic if swallowed, harmful in contact with skin, may cause an allergic skin reaction. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Phosalone?

Phosalone is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Phosalone?

CompoundList lists 4 suppliers of Phosalone in China, India, Iran and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Phosalone in India?

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

What is the price of Phosalone?

Suppliers quote Phosalone 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 Phosalone

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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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