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Insecticides and acaricides

Propetamphos

Also known as Blotic, Deadmag, Tsar

CAS 31218-83-4Formula C10H20NO4PSMolar mass 281.31 g/molEC 250-517-2
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Hazardous to the environment 2 suppliers listed
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Propetamphos chemical structure, C10H20NO4PS, CAS 31218-83-4
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Liquid
Boiling point
87 to 89
Density
1.1294 @ 20 °C
Solubility
In water, 1.10 × 10⁺² mg/l @ 24 °C
HS code
292019
Category
Insecticides and acaricides
UN number
UN 3018
Illustrative photo, a closed 1000 litre IBC tote in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Propetamphos?

Plain description, key identifiers and synonyms

Propetamphos is an organophosphate insecticide, a phosphoramidate ester and an isopropyl ester. It has a role as an agrochemical and an EC 3.1.1.7 (acetylcholinesterase) inhibitor. It is functionally related to an isopropyl 3-hydroxybut-2-enoate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
propan-2-yl (E)-3-[ethylamino(methoxy)phosphinothioyl]oxybut-2-enoate
CAS number
31218-83-4 CAS number cross-checkedOther or deprecated CAS: 58995-37-2
EC number
250-517-2
Molecular formula
C10H20NO4PS
UNII
G4A07F635U
MDL number
MFCD00137384
InChIKey
BZNDWPRGXNILMS-VQHVLOKHSA-N
InChI
InChI=1S/C10H20NO4PS/c1-6-11-16(17,13-5)15-9(4)7-10(12)14-8(2)3/h7-8H,6H2,1-5H3,(H,11,17)/b9-7+
Canonical SMILES
CCNP(=S)(OC)OC(C)=CC(=O)OC(C)C
Isomeric SMILES
CCNP(=S)(OC)O/C(=C/C(=O)OC(C)C)/C

Synonyms

  • Blotic
  • Deadmag
  • Tsar
  • Safrotin S 200
  • (E)-1-Methylethyl 3-(((ethylamino)methoxyphosphinothioyl)oxy)-2-butenoate
  • 1-Methylethyl (E)-3-(((ethylamino)methoxyphosphinothioyl)oxy)-2-butenoate
  • propan-2-yl (2E)-3-{[(ethylamino)(methoxy)phosphorothioyl]oxy}but-2-enoate
  • O-methyl O-{1-[(propan-2-yl)oxycarbonyl]prop-1-en-2-yl} ethylamidothiophosphate
  • propan-2-yl (2E)-3-(((ethylamino)(methoxy)phosphorothioyl)oxy)but-2-enoate
  • O-Methyl O-(1-((propan-2-yl)oxycarbonyl)prop-1-en-2-yl) ethylamidothiophosphate
  • 2-Butenoic acid, 3-(((ethylamino)methoxyphosphinothioyl)oxy)-, 1-methylethyl ester, (2E)-
  • propan-2-yl (2E)-3-(((ethylamino)(methoxy)sulfanylidene-lambda5-phosphanyl)oxy)but-2-enoate
  • propan-2-yl (E)-3-[ethylamino(methoxy)phosphinothioyl]oxybut-2-enoate
  • Propetamphos (>85%)
  • SAN 322I
  • OMS 1502
  • ENT 27989
  • Propetamphos (BAN)
  • 2-Butenoic acid, 3-(((ethylamino)methoxyphosphinothioyl)oxy)-, 1-methylethyl ester, (E)-
  • 2-Butenoic acid, 3-[[(ethylamino)methoxyphosphinothioyl]oxy]-, 1-methylethyl ester
  • 2-Butenoic acid, 3-[[(ethylamino)methoxyphosphinothioyl]oxy]-, 1-methylethyl ester, (E)-
  • Seraphos
  • E-Propetamphos
  • (E)-1-Metiletil-3-(((etilamino)metoxifosfinotiol)oxi)-2-butenoato
  • (E)-O-2-Isopropoxy-carbonyl-1-methylvinyl O-methyl ethylphosphoramidothioate
Show all 33 synonyms
  • O-(1-Isopropoxycarbonyl-1-propen-2-yl)-O-methyl N-ethyl-phosphoramidothionate
  • 2-Butenoic acid, 3-(((ethylamino)methoxyphosphinothioyl)oxy)-, 1-methylethyl ester
  • Crotonic acid, 3-hydroxy-, isopropyl ester, O-ester with O-methyl ethylphosphoramidothioate, (E)-
  • Sandoz 52139
  • Safrotin, analytical standard
  • (+/-)-Propetamphos
  • VEL 4283
  • SAN 52139

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

Physical form
Liquidexp.
Boiling point
87 to 89exp.
Density
1.1294 @ 20 °Cexp.
Solubility
In water, 1.10 × 10⁺² mg/l @ 24 °Cexp.
Vapour pressure
1.43 × 10⁻⁵ 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
281.31 g/molcalc.
Exact mass
281.0851 Dacalc.
LogP (octanol/water)
2.34calc.
Topological polar surface area
56.79 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
7calc.
Heavy atoms
17calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.7calc.
Formal charge
0calc.
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

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.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (9)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P391Collect spillage.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3018

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

Propetamphos suppliers

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All 2 suppliers

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Where suppliers are based

2 suppliers in 2 countries

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Propetamphos 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

Control of household and public health pets (esp cockroaches, flies, fleas, mosquitoes, clothes moths, ants, and animal ectoparasites).

Insecticide with contact & stomach action. Cholinesterase inhibitor. Long residual activity.

Roles

  • agrochemical
  • enzyme inhibitor

Functional uses

  • Biocide

Pharmacology

Propetamphos is a synthetic phosphoramidate ester compound and organophosphate acetylcholinesterase inhibitor that is used as a pesticide. It is characterized as a non-corrosive yellow oily liquid, and exposure occurs by inhalation, ingestion, or contact.

How it is made

Thiophosphoryl chloride + ethylamine + methanol + isopropyl acetoacetate (dehydrochlorination/dehydrochlorination/alpha chlorination/Perchow reaction)

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 015-136-00-6

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Propetamphos 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 Propetamphos is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Propetamphos?

Propetamphos is an organophosphate insecticide, a phosphoramidate ester and an isopropyl ester. It has a role as an agrochemical and an EC 3.1.1.7 (acetylcholinesterase) inhibitor. It is functionally related to an isopropyl 3-hydroxybut-2-enoate.

What is the CAS number of Propetamphos?

The CAS registry number of Propetamphos is 31218-83-4. Other or deprecated CAS numbers: 58995-37-2.

What is the molecular formula and weight of Propetamphos?

The molecular formula of Propetamphos is C10H20NO4PS and its molar mass is 281.31 g/mol.

What is Propetamphos used for?

Control of household and public health pets (esp cockroaches, flies, fleas, mosquitoes, clothes moths, ants, and animal ectoparasites). Insecticide with contact & stomach action. Cholinesterase inhibitor. Long residual activity.

Is Propetamphos hazardous?

Propetamphos carries the GHS signal word "Danger". Main hazards: toxic if swallowed, 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 Propetamphos?

Propetamphos 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 Propetamphos?

CompoundList lists 2 suppliers of Propetamphos in China and Japan. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Propetamphos?

Suppliers quote Propetamphos 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 Propetamphos

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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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