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Fungicides

Folpet

Also known as Faltan, Orthophaltan, Phthaltan

CAS 133-07-3Formula C9H4Cl3NO2SMolar mass 296.56 g/molEC 205-088-6
GHS signal word: Warning. Pictograms: Harmful or irritant, Serious health hazard, Hazardous to the environment 30 suppliers listed
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Folpet chemical structure, C9H4Cl3NO2S, CAS 133-07-3
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Crystals from benzene
Melting point
177 °C
Density
1.72 at 20 °C
Solubility
In water, 0.8 mg/L at room temperature
HS code
293090
Category
Fungicides
UN number
UN 3077
Illustrative photo, closed white HDPE bottles and amber jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Folpet?

Plain description, key identifiers and synonyms

Folpet is a member of the class of phthalimides that is phthalimide in which the hydrogen attached to the nitrogen is replaced by a trichloromethylthio group. An agricultural fungicide, it has been used to control mildew, leaf spot, and other diseases in crops sice the 1950s. It has a role as an antifungal agrochemical. It is an organosulfur compound, an organochlorine compound and a phthalimide fungicide. It is functionally related to a phthalimide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-(trichloromethylsulfanyl)isoindole-1,3-dione
CAS number
133-07-3 CAS number cross-checked
EC number
205-088-6
Molecular formula
C9H4Cl3NO2S
UNII
X5NFK36917
MDL number
MFCD00047303
InChIKey
HKIOYBQGHSTUDB-UHFFFAOYSA-N
InChI
InChI=1S/C9H4Cl3NO2S/c10-9(11,12)16-13-7(14)5-3-1-2-4-6(5)8(13)15/h1-4H
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)C(=O)N(C2=O)SC(Cl)(Cl)Cl

Synonyms

  • Faltan
  • Orthophaltan
  • Phthaltan
  • Folpel
  • Folpan
  • Ftalan
  • Spolacid
  • Folnit
  • Phaltan
  • Intercide TMP
  • Acryptan
  • Vinicoll
  • Fungitrol 11
  • Fungitrol
  • Phaltane
  • Faltex
  • N-(Trichloromethylthio)phthalimide
  • Cosan I
  • Thiophal
  • Trifol
  • Fungitrol II
  • Cosan T
  • Acryptane
  • Sanfol
  • Dipet
Show all 39 synonyms
  • Ortho phaltan 50W
  • Troysan anti-mildew O
  • Orthofaltan 50
  • Trichloromethylthiophthalimide
  • Murphy's rose fungicide
  • Folpex
  • 1H-Isoindole-1,3(2H)-dione, 2-[(trichloromethyl)thio]-
  • 2-[(Trichloromethyl)thio]-1H-isoindole-1,3(2H)-dione
  • N-(Trichloromethylmercapto)phthalimide
  • N-(Trichlormethylthio)phthalimide
  • N-(Trichloromethanesulphenyl)phthalimide
  • N-(Trichlor-methylthio)-phthalamid
  • ENT 26539
  • 2-((Trichloromethyl)thio)-1H-isoindole-1,3(2H)-dione

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
Crystals from benzeneexp.
Melting point
177 °Cexp.
Density
1.72 at 20 °Cexp.
Solubility
In water, 0.8 mg/L at room temperatureexp.
Vapour pressure
2.1 × 10⁻² mPa /1.57 × 10⁻⁷ 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
296.56 g/molcalc.
Exact mass
294.9028 Dacalc.
LogP (octanol/water)
3.26calc.
Topological polar surface area
37.38 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
1calc.
Heavy atoms
16calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.11calc.
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=C1NC(=O)c2ccccc21

O=C1NC(=O)c2ccccc21

2 rings, 11 atoms, the Phthalimide ring system.

2,700 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
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H317May cause an allergic skin reaction.
  • H319Causes serious eye irritation.
  • H332Harmful if inhaled.
  • H351Suspected of causing cancer.
  • H400Very toxic to aquatic life.
Precautionary statements (19)
  • P203Obtain, read and follow all safety instructions before use.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • 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.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P318If exposed or concerned, get medical advice.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P337 + P317If eye irritation persists: 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 3077
Transport hazard class
9
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

Folpet suppliers

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

All 30 suppliers
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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

30 suppliers in 10 countries

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Folpet 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

Broad spectrum contact fungicide that is effective against a fairly wide range of fungi that cause plant diseases. It acts by inhibiting fungal mycelial growth, but does not eradicate established fungal infection.

Folpet is used as a foliar fungicide on grapevines, fruit trees, and vegetables ...

Control of downy mildews, powdery mildews, leaf spot diseases, scab, excoriosis, black rot, white rot, Gleosporium rots, Botrytis, Alternaria, Phythium and Rhizoctonia spp ...

Use classes: Fungicides, Pesticides.

Pharmacological actions

  • Fungicides, Industrial

Roles

  • agrochemical
  • antifungal agent
  • antifungal agrochemical
  • antimicrobial agent
  • fungicide
  • pesticide

Functional uses

  • Biocide

How it is made

Folpet is produced by reaction of the potassium salt of phthalimide with trichloromethanesulfenyl chloride in organic solvents.

Synthesized commerically by the reaction of perchloromethylmercaptan with sodiumphthalimide in a cold aqueous system.

Produced by the reaction of potassium salt of phthalimide with trichloromethansulfenyl chloride in organic solvents.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 613-045-00-1

Health and food

  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: N-(Trichloromethylthio)phthalimide (Folpet - ISO), Ref no: 1014, Annex ref: II/1014

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 Folpet is traded under.

HS 2930.90Indicative HS code

Organo-sulphur compounds, other

World exports in 2024
$5.83B
+0.1% vs 2023, imports $5.93B
2019 to 2024
Top exporters
  1. China40.7%
  2. United States10.9%
  3. Japan9.3%
Top importers
  1. United States13.3%
  2. Brazil12.6%
  3. China6.6%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Folpet?

Folpet is a member of the class of phthalimides that is phthalimide in which the hydrogen attached to the nitrogen is replaced by a trichloromethylthio group. An agricultural fungicide, it has been used to control mildew, leaf spot, and other diseases in crops sice the 1950s. It has a role as an antifungal agrochemical.

What is the CAS number of Folpet?

The CAS registry number of Folpet is 133-07-3.

What is the molecular formula and weight of Folpet?

The molecular formula of Folpet is C9H4Cl3NO2S and its molar mass is 296.56 g/mol.

What is Folpet used for?

Broad spectrum contact fungicide that is effective against a fairly wide range of fungi that cause plant diseases. It acts by inhibiting fungal mycelial growth, but does not eradicate established fungal infection. Folpet is used as a foliar fungicide on grapevines, fruit trees, and vegetables ...

Is Folpet hazardous?

Folpet carries the GHS signal word "Warning". Main hazards: may cause an allergic skin reaction, causes serious eye irritation, harmful if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Folpet?

Folpet is usually classified under HS code 293090 (Organo-sulphur compounds, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Folpet?

CompoundList lists 30 suppliers of Folpet in France, Brazil, China, United States and 6 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Folpet in India?

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

What is the price of Folpet?

Suppliers quote Folpet 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 Folpet

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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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