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Fungicides

Fthalide

Also known as tetrachlorophthalide, 4,5,6,7-Tetrachloro-3H-isobenzofuran-1-one, 4,5,6,7-tetrachloroisobenzofuran-1(3H)-one

CAS 27355-22-2Formula C8H2Cl4O2Molar mass 271.91 g/molEC 608-088-8
GHS signal word: Warning. Pictograms: Hazardous to the environment 1 supplier listed
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Fthalide chemical structure, C8H2Cl4O2, CAS 27355-22-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
27355-22-2
Formula
C8H2Cl4O2
Molar mass
271.91 g/mol
EC number
608-088-8
HS code
293220
Category
Fungicides

What is Fthalide?

Plain description, key identifiers and synonyms

4,5,6,7-tetrachloro-2-benzofuran-1(3H)-one is a member of the class of 2-benzofurans that is 2-benzofuran-1(3H)-one in which all or the hydrogens attached to the benzene ring are replaced by chlorines. A fungicide used for the control of rice blast, it is not approved for use within the European Union. It has a role as a melanin synthesis inhibitor and an antifungal agrochemical. It is a tetrachlorobenzene, an organic heterobicyclic compound, a propan-1-ol and a gamma-lactone. It is functionally related to a 2-benzofuran-1(3H)-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4,5,6,7-tetrachloro-3H-2-benzofuran-1-one
CAS number
27355-22-2 CAS number cross-checked
EC number
608-088-8
Molecular formula
C8H2Cl4O2
UNII
44IHE2M2T4
InChIKey
NMWKWBPNKPGATC-UHFFFAOYSA-N
InChI
InChI=1S/C8H2Cl4O2/c9-4-2-1-14-8(13)3(2)5(10)7(12)6(4)11/h1H2
SMILES (canonical and isomeric)
C1C2=C(C(=C(C(=C2Cl)Cl)Cl)Cl)C(=O)O1

Synonyms

  • tetrachlorophthalide
  • 4,5,6,7-Tetrachloro-3H-isobenzofuran-1-one
  • 4,5,6,7-tetrachloroisobenzofuran-1(3H)-one
  • 4,5,6,7-tetrachloro-1,3-dihydro-2-benzofuran-1-one
  • 4,5,6,7-Tetrachlorophthalide
  • Phthalide, 4,5,6,7-tetrachloro-
  • 4,5,6,7-Tetrachloro-2-benzofuran-1(3H)-one
  • 4,5,6,7-Tetrachloro-phthalide
  • Phthalide 13C6
  • 4,5,6,7-Tetrachlorophthalidefthalide
  • 4,5,6,7-tetrachloro-3H-2-benzofuran-1-one
  • 4-17-00-04950 (Beilstein Handbook Reference)

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
271.91 g/molcalc.
Exact mass
269.8809 Dacalc.
LogP (octanol/water)
3.97calc.
Topological polar surface area
26.3 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
14calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.13calc.
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=C1OCc2ccccc21

O=C1OCc2ccccc21

2 rings, 10 atoms, the Phthalide ring system.

780 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (3)
  • P273Avoid release to the environment.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.

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

Fthalide suppliers

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Where suppliers are based

1 supplier in 1 country

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Fthalide 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

Roles

  • agrochemical
  • antifungal agent
  • antifungal agrochemical
  • antimicrobial agent
  • depigmentation drug
  • fungicide
  • melanin synthesis inhibitor
  • pesticide
  • pharmaceutical

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2932.20Indicative HS code

Lactones

World exports in 2024
$1.97B
−4.7% vs 2023, imports $2.07B
2019 to 2024
Top exporters
  1. China56.3%
  2. India * partner reported7.4%
  3. Germany7.3%
Top importers
  1. United States14.2%
  2. India * partner reported13.5%
  3. Brazil8.5%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Fthalide?

4,5,6,7-tetrachloro-2-benzofuran-1(3H)-one is a member of the class of 2-benzofurans that is 2-benzofuran-1(3H)-one in which all or the hydrogens attached to the benzene ring are replaced by chlorines. A fungicide used for the control of rice blast, it is not approved for use within the European Union.

What is the CAS number of Fthalide?

The CAS registry number of Fthalide is 27355-22-2.

What is the molecular formula and weight of Fthalide?

The molecular formula of Fthalide is C8H2Cl4O2 and its molar mass is 271.91 g/mol.

What is Fthalide used for?

Known uses and roles of Fthalide include fungicides in agriculture and crop protection, agrochemical, antifungal agent, antifungal agrochemical, antimicrobial agent and 5 more.

Is Fthalide hazardous?

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

Fthalide is usually classified under HS code 293220 (Lactones). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Fthalide?

CompoundList lists 1 supplier of Fthalide in United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Fthalide?

Suppliers quote Fthalide 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 Fthalide

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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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