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Sulfur and phosphorus compounds

Diethyl phosphate

Also known as diethyl hydrogen phosphate, Diethyl acid phosphate, diethylphosphate

CAS 598-02-7Formula C4H11O4PMolar mass 154.10 g/molEC 209-912-5
GHS signal word: Warning. Pictograms: Harmful or irritant 16 suppliers listed
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Diethyl phosphate chemical structure, C4H11O4P, CAS 598-02-7
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
598-02-7
Formula
C4H11O4P
Molar mass
154.10 g/mol
Physical form
Liquid
HS code
291990
Category
Sulfur and phosphorus compounds
Illustrative photo, 25 litre white jerry cans of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Diethyl phosphate?

Plain description, key identifiers and synonyms

Diethyl hydrogen phosphate is a dialkyl phosphate having ethyl as the alkyl group. It has a role as a mouse metabolite and a human xenobiotic metabolite. It is a conjugate acid of a diethylphosphate(1-).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
diethyl hydrogen phosphate
CAS number
598-02-7 CAS number cross-checkedOther or deprecated CAS: 51501-07-6, 52932-96-4, 53397-17-4
EC number
209-912-5
Molecular formula
C4H11O4P
UNII
W0QQU4CAB7
MDL number
MFCD00039889
InChIKey
UCQFCFPECQILOL-UHFFFAOYSA-N
InChI
InChI=1S/C4H11O4P/c1-3-7-9(5,6)8-4-2/h3-4H2,1-2H3,(H,5,6)
SMILES (canonical and isomeric)
CCOP(=O)(O)OCC

Synonyms

  • diethyl hydrogen phosphate
  • Diethyl acid phosphate
  • diethylphosphate
  • phosphoric acid, diethyl ester
  • diethoxyphosphinic acid
  • O,O-Diethyl hydrogen phosphate
  • Ethyl phosphate, di-
  • Ethyl phosphate, (ETO)2(HO)PO
  • Phosphoric acid diethyl ester
  • Diethylphosphoric acid
  • diethyl phosphoric acid
  • O,O-Diethyl phosphate
  • O,O-diethylphosphoric acid
  • Ethyl phosphate ((c2h5o)2(ho)po)
  • DPF
  • di-Ethyl phosphate
  • DiethylHydrogenPhosphate
  • Diethoxy dihydroxy phosphonium
  • diethyl hydrogen-phosphoric acid
  • Diethyl phosphate, Phosphoric acid diethyl 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

Physical form
Liquidexp.

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
154.10 g/molcalc.
Exact mass
154.0395 Dacalc.
LogP (octanol/water)
1.16calc.
Topological polar surface area
55.76 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
4calc.
Heavy atoms
9calc.
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
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • 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.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • 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

Diethyl phosphate suppliers

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

All 16 suppliers
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Where suppliers are based

16 suppliers in 4 countries

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Diethyl phosphate 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

Industrial uses: Surfactant (surface active agent).

Consumer uses: Surfactant (surface active agent).

Roles

  • animal metabolite
  • eukaryotic metabolite
  • human metabolite
  • human xenobiotic metabolite
  • mammalian metabolite
  • metabolite
  • mouse metabolite
  • xenobiotic metabolite

Regulatory status

Inventories, regulations and trade controls that list this substance

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 Diethyl phosphate is traded under.

HS 2919.90Indicative HS code

Phosphoric, and their salts, including lactophosphates, their halogenated, sulphonated, nitrated…

World exports in 2024
$940M
−0.7% vs 2023, imports $863M
2019 to 2024
Top exporters
  1. China55.6%
  2. Germany10.6%
  3. Italy6.2%
Top importers
  1. United States15.8%
  2. South Korea10.1%
  3. Germany6.4%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Diethyl phosphate, based on the data on this page

What is Diethyl phosphate?

Diethyl hydrogen phosphate is a dialkyl phosphate having ethyl as the alkyl group. It has a role as a mouse metabolite and a human xenobiotic metabolite. It is a conjugate acid of a diethylphosphate(1-).

What is the CAS number of Diethyl phosphate?

The CAS registry number of Diethyl phosphate is 598-02-7. Other or deprecated CAS numbers: 51501-07-6, 52932-96-4, 53397-17-4.

What is the molecular formula and weight of Diethyl phosphate?

The molecular formula of Diethyl phosphate is C4H11O4P and its molar mass is 154.10 g/mol.

What is Diethyl phosphate used for?

Industrial uses: Surfactant (surface active agent). Consumer uses: Surfactant (surface active agent).

Is Diethyl phosphate hazardous?

Diethyl phosphate carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Diethyl phosphate?

Diethyl phosphate is usually classified under HS code 291990 (Phosphoric esters and their salts, including lactophosphates, their halogenated…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Diethyl phosphate?

CompoundList lists 16 suppliers of Diethyl phosphate in China, United States, Germany and Slovakia. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Diethyl phosphate?

Suppliers quote Diethyl phosphate 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 Diethyl phosphate

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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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