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Impurities and reference standards

Dibutyl phosphate

Also known as Dibutyl hydrogen phosphate, Di-n-butyl phosphate, Phosphoric acid, dibutyl ester

CAS 107-66-4Formula C8H19O4PMolar mass 210.21 g/molEC 203-509-8
GHS signal word: Danger. Pictograms: Corrosive, Serious health hazard 24 suppliers listed
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Dibutyl phosphate chemical structure, C8H19O4P, CAS 107-66-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Pale-amber liquid or oil
Melting point
-13 °C
Boiling point
135 to 138
Density
1.06 g/cm³ at 20 °C
Flash point
188 °C
HS code
291990
Category
Impurities and reference standards
UN number
UN 1718
Illustrative photo, an IBC tote of amber liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Dibutyl phosphate?

Plain description, key identifiers and synonyms

Dibutyl phosphate is a dialkyl phosphate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
dibutyl hydrogen phosphate
CAS number
107-66-4 CAS number cross-checkedOther or deprecated CAS: 19069-28-4
EC number
203-509-8
Molecular formula
C8H19O4P
UNII
0072NN74TN
MDL number
MFCD00015245
InChIKey
JYFHYPJRHGVZDY-UHFFFAOYSA-N
InChI
InChI=1S/C8H19O4P/c1-3-5-7-11-13(9,10)12-8-6-4-2/h3-8H2,1-2H3,(H,9,10)
SMILES (canonical and isomeric)
CCCCOP(=O)(O)OCCCC

Synonyms

  • Dibutyl hydrogen phosphate
  • Di-n-butyl phosphate
  • Phosphoric acid, dibutyl ester
  • Dibutyl acid phosphate
  • DP 4 (coupling agent)
  • Phosphoric acid dibutyl ester
  • Di-n-butyl hydrogen phosphate
  • dibutyl acid o-phosphate
  • Dibutyl phosphoric acid
  • HDBP
  • Dibutylphosphate
  • di-n-butylphosphate
  • Di-n-butylphosphoric acid
  • Phosphoric acid di-n-butyl ester
  • 4-01-00-01530 (Beilstein Handbook Reference)
  • DI-n-BUTYL PHOSPHATE, TECH
  • Dibutyl phosphate, >=97.0% (T)
  • Tri-N-Butyl Phosphate EP Impurity A
  • Dibutyl phosphate (mono- and di- ester mixture)
  • Phosphoric acid dibutyl ester (mono- and di- ester mixture)

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
Pale-amber liquid or oilexp.
Odour
Odorlessexp.
Melting point
-13 °Cexp.
Boiling point
135 to 138exp.
Density
1.06 g/cm³ at 20 °Cexp.
Flash point
188 °Cexp.
Autoignition temperature
420 °Cexp.
Solubility
In water, 1.72 × 10⁺⁴ mg/L at 25 °Cexp.
Vapour pressure
VP: <1 mm Hg at 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
210.21 g/molcalc.
Exact mass
210.1021 Dacalc.
LogP (octanol/water)
2.72calc.
Topological polar surface area
55.76 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
8calc.
Heavy atoms
13calc.
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
GHS05: Corrosive
Corrosive
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H314Causes severe skin burns and eye damage.
  • H318Causes serious eye damage.
  • H351Suspected of causing cancer.
Precautionary statements (16)
  • P203Obtain, read and follow all safety instructions before use.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P318If exposed or concerned, get medical advice.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1718

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

Dibutyl phosphate suppliers

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

All 24 suppliers
24 of 24 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

24 suppliers in 5 countries

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Dibutyl 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

Organic catalyst and antifoaming agent.

Feedstock for chemical synthesis.

As a catalyst in manufacture of phenolic & urea resins, in metal separation & extraction.

(a) Paint industry (catalyst for cross-linking) 100% in Japan. (b) Plasticizer, hydraulic fluids, and antifoaming agent. (c) Also is used in heat exchange dielectric medium. (d) Antistatics for the textile industry.

Industrial uses: Plasticizer, Surface modifier, Surfactant (surface active agent), Wrinkle resisting agent, Processing aids not otherwise specified.

Consumer uses: Plasticizer, Processing aids not otherwise specified, Surfactant (surface active agent), Wrinkle resisting agent.

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 Dibutyl 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 Dibutyl phosphate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Dibutyl phosphate?

Dibutyl phosphate is a dialkyl phosphate.

What is the CAS number of Dibutyl phosphate?

The CAS registry number of Dibutyl phosphate is 107-66-4. Other or deprecated CAS numbers: 19069-28-4.

What is the molecular formula and weight of Dibutyl phosphate?

The molecular formula of Dibutyl phosphate is C8H19O4P and its molar mass is 210.21 g/mol.

What is Dibutyl phosphate used for?

Organic catalyst and antifoaming agent. Feedstock for chemical synthesis. As a catalyst in manufacture of phenolic & urea resins, in metal separation & extraction. (a) Paint industry (catalyst for cross-linking) 100% in Japan. (b) Plasticizer, hydraulic fluids, and antifoaming agent.

Is Dibutyl phosphate hazardous?

Dibutyl phosphate carries the GHS signal word "Danger". Main hazards: causes severe skin burns and eye damage, causes serious eye damage, suspected of causing cancer. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Dibutyl phosphate?

Dibutyl 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 Dibutyl phosphate?

CompoundList lists 24 suppliers of Dibutyl phosphate in United States, China, Germany, India and 1 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Dibutyl phosphate in India?

2 suppliers in India list Dibutyl phosphate on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Dibutyl phosphate?

Suppliers quote Dibutyl 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 Dibutyl 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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