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Insecticides and acaricides

Sulfotep

Also known as Sulfotepp, Dithiophos, Dithione

CAS 3689-24-5Formula C8H20O5P2S2Molar mass 322.33 g/molEC 222-995-2
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Hazardous to the environment
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Sulfotep chemical structure, C8H20O5P2S2, CAS 3689-24-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless oil
Melting point
88 °C
Boiling point
310 °C
Density
Relative density (water = 1): 1.2
Flash point
Not combustible
HS code
292019
Category
Insecticides and acaricides
UN number
UN 1704
Illustrative photo, clear colourless liquid in a glass reagent bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Sulfotep?

Plain description, key identifiers and synonyms

Sulfotep is an organothiophosphate insecticide and an organic thiophosphate. 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 functionally related to a dithiodiphosphoric acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
diethoxyphosphinothioyloxy-diethoxy-sulfanylidene-λ5-phosphane
CAS number
3689-24-5 CAS number cross-checked
EC number
222-995-2
Molecular formula
C8H20O5P2S2
UNII
V41BK2EE8X
MDL number
MFCD00145099
InChIKey
XIUROWKZWPIAIB-UHFFFAOYSA-N
InChI
InChI=1S/C8H20O5P2S2/c1-5-9-14(16,10-6-2)13-15(17,11-7-3)12-8-4/h5-8H2,1-4H3
SMILES (canonical and isomeric)
CCOP(=S)(OCC)OP(=S)(OCC)OCC

Synonyms

  • Sulfotepp
  • Dithiophos
  • Dithione
  • Dithion
  • TEDP
  • TEDTP
  • Dithiofos
  • Dithiotep
  • Bladafum
  • Thiotepp
  • Pirofos
  • Fulex
  • Ethyl thiopyrophosphate
  • Lethalaire G-57
  • Plant dithio aerosol
  • O,O,O,O-Tetraethyl dithiopyrophosphate
  • Bladafume
  • Sulfatep
  • ASP 47
  • Bayer-E 393
  • Plantfume 103 smoke generator
  • Tetraethyl dithionopyrophosphate
  • Rcra waste number P109
  • Bladafun
  • Tetraethyldithiodifosfat
Show all 39 synonyms
  • Tetraethyl thiodiphosphate
  • ENT 16,273
  • Dithiopyrophosphate de tetraethyle
  • Dithiodiphosphoric acid, tetraethyl ester
  • Thiopyrophosphoric acid, tetraethyl ester
  • Pyrophosphorodithioic acid, tetraethyl ester
  • Thiodiphosphoric acid tetraethyl ester
  • Bis(O,O-diethylphosphorothionic) anhydride
  • Tetraethyl thiopyrophosphate
  • o,o,o,o-Tetraethyl dithiodiphosphate
  • O,O,O,O-Tetraethyl-dithio-difosfaat
  • O,O,O,O-Tetraetil-ditio-pirofosfato
  • Thiodiphosphoric acid ([(HO)2P(S)]2O), tetraethyl ester
  • Thiodiphosphoric acid, tetraethyl ester

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
Colorless oilexp.
Odour
Possesses a garlic odorexp.
Melting point
88 °Cexp.
Boiling point
310 °Cexp.
Density
Relative density (water = 1): 1.2exp.
Flash point
Not combustibleexp.
Solubility
Sol in water, 30 mg/l @ 20 °Cexp.
Vapour pressure
1.05 × 10⁻⁴ mm Hg @ 20 °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
322.33 g/molcalc.
Exact mass
322.0227 Dacalc.
LogP (octanol/water)
3.6calc.
Topological polar surface area
46.15 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
7calc.
Rotatable bonds
10calc.
Heavy atoms
17calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
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

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H300Fatal if swallowed.
  • H310Fatal in contact with skin.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (14)
  • P262Do not get in eyes, on skin, or on clothing.
  • P264Wash skin thoroughly after handling.
  • 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 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P361 + P364Take off immediately all 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 1704
Transport hazard class
6.1
Packing group
II

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

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Sulfotep price

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Uses and applications

What the substance is used for, by industry and function

[U.S. Environmental Protection Agency/Office of Pesticide Program's Chemical Ingredients Database on Sulfotep (3689-24-5). Available from the Database Query page at http://www.cdpr.ca.gov/docs/epa/epamenu.htm as of April 30, 2003.] For Sulfotepp (USEPA/OPP Pesticide Code:079501) there are 0 labels match.

Insecticide, acaricide.

Greenhouse fumigant to control aphids, spider mites, thrips, and whiteflies.

Used in aerosols for greenhouse pest control.

Use classes: Pharmaceuticals.

Roles

  • acaricide
  • agrochemical
  • enzyme inhibitor
  • pesticide

Functional uses

  • Biocide

Pharmacology

Sulfotep is a synthetic organic thiophosphate compound and organophosphate acetylcholinesterase inhibitor that is used as a pesticide. It is characterized as a highly toxic colorless to pale yellow oily liquid with a garlic-like odor, and exposure occurs by inhalation, ingestion, or contact.

How it is made

Produced by action of sulfur on tetraethyl pyrophosphate: west german patent 896,644 or by interaction of o,o-diethyl phosphorochloridothioate with aq sodium carbonate in presence of pyridine (toy, adf, j am chem soc, 1951, 73, 4670) ...

Prepn: A.D.F. Toy, J. Am. Chem. Soc. 73, 4670 (1951), G. Schrader, R. Muhlmann, DE 848812 (1952 to Bayer), C.A. 47, 5426a (1953), R. Appel, H. Einig, Z. Anorg. Allgem. Chem. 414, 236 (1975).

Production: O,O-diethyl phosphorochlorothioate (base hydrolysis)

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 015-027-00-3

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2920.19Indicative HS code

Thiophosphoric esters (phosphorothioates) and their salts, their halogenated…

World exports in 2024
$131M
+2.1% vs 2023, imports $115M
2019 to 2024
Top exporters
  1. China59.7%
  2. Japan17.6%
  3. Germany9.1%
Top importers
  1. Brazil16.0%
  2. United States13.3%
  3. India * partner reported8.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Sulfotep?

Sulfotep is an organothiophosphate insecticide and an organic thiophosphate. 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 functionally related to a dithiodiphosphoric acid.

What is the CAS number of Sulfotep?

The CAS registry number of Sulfotep is 3689-24-5.

What is the molecular formula and weight of Sulfotep?

The molecular formula of Sulfotep is C8H20O5P2S2 and its molar mass is 322.33 g/mol.

What is Sulfotep used for?

[U.S. Environmental Protection Agency/Office of Pesticide Program's Chemical Ingredients Database on Sulfotep (3689-24-5). Available from the Database Query page at http://www.cdpr.ca.gov/docs/epa/epamenu.htm as of April 30, 2003.] For Sulfotepp (USEPA/OPP Pesticide Code:079501) there are 0 labels match.

Is Sulfotep hazardous?

Sulfotep carries the GHS signal word "Danger". Main hazards: fatal if swallowed, fatal in contact with skin, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Sulfotep?

Sulfotep is usually classified under HS code 292019 (Thiophosphoric esters (phosphorothioates) and their salts, their halogenated…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Sulfotep?

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What is the price of Sulfotep?

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Guides for buyers

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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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