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Initiators, curing agents and crosslinkers

Dicumyl peroxide

Also known as Cumene peroxide, Cumyl peroxide, dicumylperoxide

CAS 80-43-3Formula C18H22O2Molar mass 270.37 g/molEC 201-279-3
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant, Serious health hazard, Hazardous to the environment 28 suppliers listed
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Dicumyl peroxide chemical structure, C18H22O2, CAS 80-43-3
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Crystals from ethanol
Melting point
40 °C
Boiling point
130 °C
Density
1.0 g/cm³
Flash point
71.1 °C
HS code
290960
Category
Initiators, curing agents and crosslinkers
UN number
UN 3110
Illustrative photo, 25 kg white woven sacks of powder on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Dicumyl peroxide?

Plain description, key identifiers and synonyms

Dicumyl peroxide is a white powder with a characteristic odor. (NTP, 1992)

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene
CAS number
80-43-3 CAS number cross-checked
EC number
201-279-3
Molecular formula
C18H22O2
UNII
M51X2J0U9D
MDL number
MFCD00036227
InChIKey
XMNIXWIUMCBBBL-UHFFFAOYSA-N
InChI
InChI=1S/C18H22O2/c1-17(2,15-11-7-5-8-12-15)19-20-18(3,4)16-13-9-6-10-14-16/h5-14H,1-4H3
SMILES (canonical and isomeric)
CC(C)(C1=CC=CC=C1)OOC(C)(C)C2=CC=CC=C2

Synonyms

  • Cumene peroxide
  • Cumyl peroxide
  • dicumylperoxide
  • Di-Cup
  • Perkadox B
  • Perkadox BC
  • Percumyl D
  • Perkadox SB
  • Dicumenyl peroxide
  • Luperco
  • Luperox
  • Percumyl D 40
  • Kayacumyl D
  • Luperox 500
  • Luperox 500R
  • Luperox 500T
  • Dicumene hydroperoxide
  • Diisopropylbenzene peroxide
  • DiCup 40KE
  • Peroxide, bis(1-methyl-1-phenylethyl)
  • Varox dcp-R
  • Varox dcp-T
  • Active dicumyl peroxide
  • Di-cup 40C
  • Perkadox BC 9
Show all 39 synonyms
  • Isopropylbenzene peroxide
  • Luperco 500-40C
  • Di-cup R
  • Di-cup T
  • Bis(1-methyl-1-phenylethyl) peroxide
  • Di-cup 40haf
  • Luperco 500-40KE
  • Perkadox BC 40
  • Perkadox BC 95
  • Samperox DCP
  • Perkadox 96
  • Lupersol 500
  • Di-cup 40ke
  • Dicup 40

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
Crystals from ethanolexp.
Melting point
40 °Cexp.
Boiling point
130 °Cexp.
Density
1.0 g/cm³exp.
Flash point
71.1 °Cexp.
Solubility
In water, 0.4 mg/L at 25 °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
270.37 g/molcalc.
Exact mass
270.162 Dacalc.
LogP (octanol/water)
4.81calc.
Topological polar surface area
18.46 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
5calc.
Heavy atoms
20calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.33calc.
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, c1ccc(COOCc2ccccc2)cc1

c1ccc(COOCc2ccccc2)cc1

2 rings, 16 atoms, the Benzyl peroxide ring system.

14 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H242Heating may cause a fire.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H360DMay damage the unborn child.
  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (24)
  • P203Obtain, read and follow all safety instructions before use.
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P234Keep only in original packaging.
  • P235Keep cool.
  • P240Ground and bond container and receiving equipment.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P318If exposed or concerned, get medical advice.
  • 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.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P391Collect spillage.
  • P403Store in a well-ventilated place.
  • P405Store locked up.
  • P410Protect from sunlight.
  • P411Store at temperatures not exceeding the specified limit.
  • P420Store separately.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3110
Transport hazard class
5.2
Packing group
II

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

Dicumyl peroxide suppliers

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

All 28 suppliers
28 of 28 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

28 suppliers in 15 countries

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Dicumyl peroxide price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Vulcanizing agent for natural & synthetic rubber, crosslinking agent for polyethylene, synergist for flame retardants in polystyrene foams, curing agent for silicone rubber.

Polymerization catalyst and vulcanizing agent.

Industrial uses: Other, Polymerization promoter, Chemical reaction regulator.

Consumer uses: Other.

Functional uses

  • Catalyst
  • Chemical reaction regulator
  • Flame retardant
  • Hardener
  • Processing aids not otherwise specified

How it is made

The reaction of cumene hydroperoxide with 2-phenyl-2-propanol in the presence of a mineral acid catalyst gives dicumyl peroxide in almost quantitative yield.

Autooxidation of cumene

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 617-006-00-X

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 Dicumyl peroxide is traded under.

HS 2909.60Indicative HS code

Alcohol peroxides, ether peroxides, acetal and hemiacetal peroxides, ketone peroxides…

World exports in 2024
$498M
−0.2% vs 2023, imports $522M
2019 to 2024
Top exporters
  1. China46.5%
  2. Germany16.2%
  3. United States10.1%
Top importers
  1. United States11.4%
  2. Germany8.4%
  3. South Korea7.3%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Dicumyl peroxide, based on the data on this page

What is Dicumyl peroxide?

Dicumyl peroxide is a white powder with a characteristic odor. (NTP, 1992)

What is the CAS number of Dicumyl peroxide?

The CAS registry number of Dicumyl peroxide is 80-43-3.

What is the molecular formula and weight of Dicumyl peroxide?

The molecular formula of Dicumyl peroxide is C18H22O2 and its molar mass is 270.37 g/mol.

What is Dicumyl peroxide used for?

Vulcanizing agent for natural & synthetic rubber, crosslinking agent for polyethylene, synergist for flame retardants in polystyrene foams, curing agent for silicone rubber. Polymerization catalyst and vulcanizing agent. Industrial uses: Other, Polymerization promoter, Chemical reaction regulator. Consumer uses: Other.

Is Dicumyl peroxide hazardous?

Dicumyl peroxide carries the GHS signal word "Danger". Main hazards: heating may cause a fire, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Dicumyl peroxide?

Dicumyl peroxide is usually classified under HS code 290960 (Alcohol peroxides, ether peroxides, acetal and hemiacetal peroxides, ketone peroxides…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Dicumyl peroxide?

CompoundList lists 28 suppliers of Dicumyl peroxide in China, United States, India, Turkey and 11 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Dicumyl peroxide in India?

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

What is the price of Dicumyl peroxide?

Suppliers quote Dicumyl peroxide 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 Dicumyl peroxide

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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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