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Fungicides

Fosetyl

Also known as Ethyl phosphite, Ethyl hydrogen phosphonate, Ethyl phosphonate

CAS 15845-66-6Formula C2H6O3P+Molar mass 109.04 g/mol
1 supplier listed
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Fosetyl chemical structure, C2H6O3P+, CAS 15845-66-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
15845-66-6
Formula
C2H6O3P+
Molar mass
109.04 g/mol
HS code
292029
Category
Fungicides

What is Fosetyl?

Plain description, key identifiers and synonyms

Fosetyl is a phosphonic ester that is the monoethyl ester of phosphonic acid. A fungicide used (as its aluminium salt) for various horticultural crops used to control a range of diseases including Phytophthora, Pythium and Plasmopara. It has a role as an antifungal agrochemical. It is a conjugate acid of a fosetyl(1-).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ethoxy-hydroxy-oxophosphanium
CAS number
15845-66-6 CAS number cross-checked
Molecular formula
C2H6O3P+
UNII
ZUL337Z2KC
InChIKey
ZUNGGJHBMLMRFJ-UHFFFAOYSA-O
InChI
InChI=1S/C2H5O3P/c1-2-5-6(3)4/h2H2,1H3/p+1
SMILES (canonical and isomeric)
CCO[P+](=O)O

Synonyms

  • Ethyl phosphite
  • Ethyl hydrogen phosphonate
  • Ethyl phosphonate
  • Monoethyl phosphonate
  • Phosphonic acid, monoethyl ester
  • Monoethyl phosphite
  • ethoxy-hydroxy-oxophosphanium
  • TL 463
  • Aluminiumfosetyle
  • Fosetyle-Al
  • monoethylphosphonate
  • ethyl phosphinic acid
  • ethyl hydrogen (R)-phosphonate

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
109.04 g/molcalc.
Exact mass
109.0049 Dacalc.
LogP (octanol/water)
0.67calc.
Topological polar surface area
46.53 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
2calc.
Heavy atoms
6calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
1calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Fosetyl suppliers

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Where suppliers are based

1 supplier in 1 country

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Fosetyl 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

Roles

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

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 Fosetyl is traded under.

HS 2920.29Indicative HS code

Phosphite esters and their salts, their halogenated, sulphonated, nitrated or nitrosated…

World exports in 2024
$437M
+9.3% vs 2023, imports $367M
2019 to 2024
Top exporters
  1. China26.4%
  2. South Korea19.9%
  3. Germany12.8%
Top importers
  1. China10.9%
  2. Germany9.3%
  3. Switzerland * partner reported7.7%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Fosetyl?

Fosetyl is a phosphonic ester that is the monoethyl ester of phosphonic acid. A fungicide used (as its aluminium salt) for various horticultural crops used to control a range of diseases including Phytophthora, Pythium and Plasmopara. It has a role as an antifungal agrochemical. It is a conjugate acid of a fosetyl(1-).

Guides for buyers

Practical guides that help when you source, ship or handle Fosetyl

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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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