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Monomers

Diallyl phthalate

Also known as Allyl phthalate, Diallylphthalate, Dapon R

CAS 131-17-9Formula C14H14O4Molar mass 246.26 g/molEC 205-016-3
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 31 suppliers listed
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Diallyl phthalate chemical structure, C14H14O4, CAS 131-17-9
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Nearly colorless, oily liquid
Melting point
-70 °C
Boiling point
290 °C
Density
Relative density (water = 1): 1.1
Flash point
166 °C
HS code
291734
Category
Monomers
UN number
UN 3082
Illustrative photo, 200 litre blue HDPE drums of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Diallyl phthalate?

Plain description, key identifiers and synonyms

Diallyl phthalate is a clear pale-yellow liquid. Odorless. (NTP, 1992)

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
bis(prop-2-enyl) benzene-1,2-dicarboxylate
CAS number
131-17-9 CAS number cross-checkedOther or deprecated CAS: 143318-73-4
EC number
205-016-3
Molecular formula
C14H14O4
UNII
F79L0UL6ST
MDL number
MFCD00008646
INCI name
POLYDIALLYL PHTHALATE
InChIKey
QUDWYFHPNIMBFC-UHFFFAOYSA-N
InChI
InChI=1S/C14H14O4/c1-3-9-17-13(15)11-7-5-6-8-12(11)14(16)18-10-4-2/h3-8H,1-2,9-10H2
SMILES (canonical and isomeric)
C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C

Synonyms

  • Allyl phthalate
  • Diallylphthalate
  • Dapon R
  • Dapon 35
  • Phthalic acid, diallyl ester
  • 1,2-Benzenedicarboxylic acid, di-2-propenyl ester
  • o-Phthalic acid, diallyl ester
  • Diallylester kyseliny ftalove
  • Di-2-propenyl 1,2-benzenedicarboxylate
  • Diallylester phthalic acid
  • 1,2-Benzenedicarboxylic acid, 1,2-di-2-propen-1-yl ester
  • bis(prop-2-enyl) benzene-1,2-dicarboxylate
  • Diallyl ester o-phthalic acid
  • 1,2-bis(prop-2-en-1-yl) benzene-1,2-dicarboxylate
  • Phthalic Acid Diallyl Ester
  • phthalic acid, bis-allyl ester
  • DAP monomer
  • di-allyl phthalate
  • diallyl benzene-1,2-dicarboxylate
  • Diprop-2-enyl benzene-1,2-dicarboxylate
  • Diallyl phthalate, 97%
  • 4-09-00-03188 (Beilstein Handbook Reference)
  • Diallyl ester of phthalic acid
  • RX 1-501N (Salt/Mix)
  • RX 3-1-530 (Salt/Mix)
Show all 30 synonyms
  • Nonflammable decobest DA (Salt/Mix)
  • Diallyl phthalate, analytical standard
  • Di(prop-2-en-1-yl) benzene-1,2-dicarboxylate
  • prop-2-enyl 2-(prop-2-enyloxycarbonyl)benzoate
  • Diallyl ortho-phthalate, 1,2Benzenedicarboxylic acid di-2-propenyl ester, Phthalic acid,bis-allyl ester, Phthalic acid diallyl 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
Nearly colorless, oily liquidexp.
Odour
Mild lachrymatoryexp.
Melting point
-70 °Cexp.
Boiling point
290 °Cexp.
Density
Relative density (water = 1): 1.1exp.
Flash point
166 °Cexp.
Autoignition temperature
385 °Cexp.
Solubility
In water, 182 mg/L at 25 °Cexp.
Vapour pressure
VP: 2.4 mm Hg at 150 °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
246.26 g/molcalc.
Exact mass
246.0892 Dacalc.
LogP (octanol/water)
2.37calc.
Topological polar surface area
52.6 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
6calc.
Heavy atoms
18calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.14calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

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
111NFPA 704 rating

Hazard statements

  • H302Harmful if swallowed.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (7)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3082
Transport hazard class
9
Packing group
III

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

Diallyl phthalate suppliers

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All 31 suppliers
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Where suppliers are based

31 suppliers in 9 countries

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Diallyl phthalate 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

Most diallyl phthalate compounds are sold under military specification and are used in critical electrical/electronic applications requiring high reliability under long-term, adverse environmental conditions. A significant application area is in electronic connectors in communications, computer and aerospace systems. Other uses are insulators, potentiometers, and circuit boards.

Diallyl phthalate (DAP) is used in industry as a monomer in the processing of thermosetting plastics, polyester resins, and varnishes.

Peroxide diluent in polyester spray systems, dye carrier, eg, in polyester dyeing, sealant, eg, in insulating varnishes and metal castings, impregnant, eg, for jewelry.

Primary plasticizer that will polymerize if not inhibited, a monomer that will polymerize with heat and catalyst.

Read more

Forms low-pressure laminates with various fillers such as glass cloth, paper, etc., for electrical insulation.

Plastics -> Typical concentration range in plastic materials -> 10.0 - 35.0%.

Industrial uses: Waterproofing agent, Plasticizer, Insulators.

Consumer uses: Plasticizer.

Use classes: Plastics.

Cosmetic ingredient, INCI name POLYDIALLYL PHTHALATE(film forming)

Functional uses

  • Film former
  • Fragrance
  • Plasticizer

Cosmetic functions

  • Film forming

How it is made

A general method for the preparation of allyl esters is the reaction of allyl alcohol with the free acids, acid anhydrides, or acid chlorides. Catalysts frequently used are aromatic sulfonic acids (p-toluenesulfonic acid and naphthalene-2-sulfonic acid). Strong mineral acids are of less value because they can decompose the allyl alcohol. Polymerizable acids are esterified in the presence of phenolic inhibitors.

Read more

The following allyl esters are prepared by this method: diallyl phthalate, diallyl isophthalate, diallyl maleate, diallyl fumarate, triallyl cyanurate (from cyanuric chloride and allyl alcohol), and diethylene glycol bis(allyl carbonate). ...

Diallyl phthalate is obtained from the reaction of allyl chloride and phthalic anhydride in the presence of sodium hydroxide, sodium carbonate, tertiary amines, or quaternary ammonium salts.

Transesterification of the corresponding methyl esters with allyl alcohol, sodium methanolate is the preferred catalyst.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 607-086-00-4

Health and food

  • EU cosmetic ingredient inventory

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 Diallyl phthalate is traded under.

HS 2917.34Indicative HS code

Aromatic polycarboxylic acids, other esters of orthophthalic acids

World exports in 2024
$279M
−7.8% vs 2023, imports $292M
2019 to 2024
Top exporters
  1. China18.7%
  2. India * partner reported16.0%
  3. South Korea14.2%
Top importers
  1. United States10.6%
  2. Germany8.7%
  3. China8.0%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Diallyl phthalate, based on the data on this page

What is Diallyl phthalate?

Diallyl phthalate is a clear pale-yellow liquid. Odorless. (NTP, 1992)

What is the CAS number of Diallyl phthalate?

The CAS registry number of Diallyl phthalate is 131-17-9. Other or deprecated CAS numbers: 143318-73-4.

What is the molecular formula and weight of Diallyl phthalate?

The molecular formula of Diallyl phthalate is C14H14O4 and its molar mass is 246.26 g/mol.

What is Diallyl phthalate used for?

Most diallyl phthalate compounds are sold under military specification and are used in critical electrical/electronic applications requiring high reliability under long-term, adverse environmental conditions. A significant application area is in electronic connectors in communications, computer and aerospace systems.

Is Diallyl phthalate hazardous?

Diallyl phthalate carries the GHS signal word "Warning". Main hazards: harmful 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 Diallyl phthalate?

Diallyl phthalate is usually classified under HS code 291734 (Aromatic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Diallyl phthalate?

CompoundList lists 31 suppliers of Diallyl phthalate in China, United States, India, Germany and 5 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Diallyl phthalate in India?

4 suppliers in India list Diallyl phthalate on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Diallyl phthalate?

Suppliers quote Diallyl phthalate 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 Diallyl phthalate

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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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