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Insecticides and acaricides

Aspon

Also known as Stauffer asp-51, Tetra-n-propyl dithiopyrophosphate, O,O,O,O-Tetrapropyl dithiopyrophosphate

CAS 3244-90-4Formula C12H28O5P2S2Molar mass 378.43 g/molEC 221-817-0
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment
Get quotes Safety data
Aspon chemical structure, C12H28O5P2S2, CAS 3244-90-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Technical product (93-96% pure) is a straw to amber-colored liquid
Boiling point
170 °C
Density
Density at 20 °C/20 °C = 1.119-1.123 (Technical product, 93-96% pure)
Flash point
149 °C
Solubility
Solubility in water at 20 °C is 30 mg/l water (Technical product, 93-96% pure).
HS code
292019
Category
Insecticides and acaricides
Illustrative photo, amber viscous resin in a steel drum in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Aspon?

Plain description, key identifiers and synonyms

Aspon is a chemical substance with the molecular formula C12H28O5P2S2 and a molar mass of 378.43 g/mol. Its CAS registry number is 3244-90-4. The IUPAC name is dipropoxyphosphinothioyloxy-dipropoxy-sulfanylidene-λ5-phosphane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
dipropoxyphosphinothioyloxy-dipropoxy-sulfanylidene-λ5-phosphane
CAS number
3244-90-4 CAS number cross-checked
EC number
221-817-0
Molecular formula
C12H28O5P2S2
UNII
PC55IL137P
InChIKey
IIDFEIDMIKSJSV-UHFFFAOYSA-N
InChI
InChI=1S/C12H28O5P2S2/c1-5-9-13-18(20,14-10-6-2)17-19(21,15-11-7-3)16-12-8-4/h5-12H2,1-4H3
SMILES (canonical and isomeric)
CCCOP(=S)(OCCC)OP(=S)(OCCC)OCCC

Synonyms

  • Stauffer asp-51
  • Tetra-n-propyl dithiopyrophosphate
  • O,O,O,O-Tetrapropyl dithiopyrophosphate
  • ASP 51
  • Tetrapropyldithiodifosfat
  • Tetrapropyl dithiopyrophosphate
  • ENT 16,894
  • Tetrapropyl thiodiphosphate
  • Thiopyrophosphoric acid, tetrapropyl ester
  • Tetrapropyl thiopyrophosphate
  • Thiodiphosphoric acid (((HO)2P(S))2O), tetrapropyl ester
  • Propyl thiopyrophosphate (((PrO)2P(S))2O)
  • Thiopyrophosphoric acid (((HO)2PS)2O), tetrapropyl ester
  • Thiopyrophosphoric acid ([(HO)2PS]2O), tetrapropyl ester
  • Thiodiphosphoric acid ([(HO)2P(S)]2O), tetrapropyl ester
  • Propyl thiopyrophosphate ([(PrO)2P(S)]2O)
  • 4-01-00-01432 (Beilstein Handbook Reference)
  • Thiodiphosphoric acid (((ho)2p(S))2o), op,op,op',op'-tetrapropyl ester
  • Thiodiphosphoric acid [((ho)2p(S))2o], tetrapropyl ester
  • Thiopyrophosphoric acid [((ho)2ps)2o], tetrapropyl ester
  • Stauffer ASP51
  • Tetrapropyl thiopyrophosphate (8CI)
  • Tetranpropyl dithiopyrophosphate
  • Tetranpropyl dithionopyrophosphate
  • O,O,O,OTetrapropyl dithiopyrophosphate
Show all 35 synonyms
  • BisO,Odinpropylphosphorothionic anhydride
  • O,O,O,OTetranpropyl dithiopyrophosphate
  • Bis(O,Odi(npropyl))phosphorothionic anhydride
  • O,O,O,o,-tetra-n-propyl dithiopyrophosphate
  • Thiodiphosphoric acid (((HO)2P(S))2O), tetrapropyl ester (9CI)
  • Thiopyrophosphoric acid (((HO)2PS)2O), tetrapropyl ester (8CI)
  • Propyl thiopyrophosphate
  • Tetra-n-propyl dithionopyrophosphate
  • Bis(O,O-di(N-propyl))phosphorothionic anhydride
  • O,O,O,O-Tetra-n-propyl dithiopyrophosphate

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
Technical product (93-96% pure) is a straw to amber-colored liquidexp.
Odour
Technical product (93-96% pure) has a faint aromatic odor.exp.
Boiling point
170 °Cexp.
Density
Density at 20 °C/20 °C = 1.119-1.123 (Technical product, 93-96% pure)exp.
Flash point
149 °Cexp.
Solubility
Solubility in water at 20 °C is 30 mg/l water (Technical product, 93-96% pure).exp.
Vapour pressure
The vapor pressure at 25 °C is 13 mPa (Technical product, 93- 96% pure)exp.

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
378.43 g/molcalc.
Exact mass
378.0853 Dacalc.
LogP (octanol/water)
5.16calc.
Topological polar surface area
46.15 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
7calc.
Rotatable bonds
14calc.
Heavy atoms
21calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (1 violation)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (12)
  • 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 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • 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

Aspon suppliers

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Aspon price

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Uses and applications

What the substance is used for, by industry and function

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.".

Insecticide (former use).

Acaricide (former use).

A non-systemic insecticide particularly effective at 8.6 kg ai/ha for the control of Blissus leucopterus in turf. (Former use).

How it is made

Reaction of o,o-di-n-propyl phosphorochloridothioate with water, in the presence of pyridine

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 015-081-00-8

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

Frequently asked questions

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

What is Aspon?

Aspon is a chemical substance with the molecular formula C12H28O5P2S2 and a molar mass of 378.43 g/mol. Its CAS registry number is 3244-90-4. The IUPAC name is dipropoxyphosphinothioyloxy-dipropoxy-sulfanylidene-λ5-phosphane.

What is the CAS number of Aspon?

The CAS registry number of Aspon is 3244-90-4.

What is the molecular formula and weight of Aspon?

The molecular formula of Aspon is C12H28O5P2S2 and its molar mass is 378.43 g/mol.

What is Aspon used for?

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.". Insecticide (former use). Acaricide (former use). A non-systemic insecticide particularly effective at 8.6 kg ai/ha for the control of Blissus leucopterus in turf. (Former use).

Is Aspon hazardous?

Aspon carries the GHS signal word "Warning". Main hazards: harmful if swallowed, harmful 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 Aspon?

Aspon 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 Aspon?

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What is the price of Aspon?

Suppliers quote Aspon 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

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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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