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Initiators, curing agents and crosslinkers

Caprylyl peroxide

Also known as Dioctanoyl peroxide, Octanoyl peroxide, Peroxide, bis(1-oxooctyl)

CAS 762-16-3Formula C16H30O4Molar mass 286.41 g/molEC 212-094-2
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant
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Caprylyl peroxide chemical structure, C16H30O4, CAS 762-16-3
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Liquid
Melting point
29 °C
HS code
291719
Category
Initiators, curing agents and crosslinkers
UN number
UN 3106
Illustrative photo, closed amber glass reagent bottles on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Caprylyl peroxide?

Plain description, key identifiers and synonyms

Straw-colored liquid, sharp odor.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
octanoyl octaneperoxoate
CAS number
762-16-3 CAS number cross-checked
EC number
212-094-2
Molecular formula
C16H30O4
UNII
H709TZ1FAF
InChIKey
SRSFOMHQIATOFV-UHFFFAOYSA-N
InChI
InChI=1S/C16H30O4/c1-3-5-7-9-11-13-15(17)19-20-16(18)14-12-10-8-6-4-2/h3-14H2,1-2H3
SMILES (canonical and isomeric)
CCCCCCCC(=O)OOC(=O)CCCCCCC

Synonyms

  • Dioctanoyl peroxide
  • Octanoyl peroxide
  • Peroxide, bis(1-oxooctyl)
  • Dicaprylyl peroxide
  • Caprolyl peroxide
  • Capryl peroxide
  • Perkadox se
  • n-Octanoyl peroxide, (technically pure)
  • n-Octanoyl peroxide
  • di-n-octanoyl peroxide
  • Peroyl o
  • Perkadox se 8
  • Peroxide, bis(1oxooctyl)
  • octanoyl octaneperoxoate

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.
Melting point
29 °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
286.41 g/molcalc.
Exact mass
286.2144 Dacalc.
LogP (octanol/water)
4.71calc.
Topological polar surface area
52.6 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
12calc.
Heavy atoms
20calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.88calc.
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
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H242Heating may cause a fire.
  • H315Causes skin irritation.
  • H317May cause an allergic skin reaction.
Precautionary statements (19)
  • 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.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403Store in a well-ventilated place.
  • 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 3106

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

Caprylyl peroxide suppliers

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Caprylyl peroxide 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

Initiator for suspension or mass polymerization of vinyl chloride monomers.

Functional uses

  • Catalyst
  • Chemical reaction regulator

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 Caprylyl peroxide is traded under.

HS 2917.19Indicative HS code

Acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and…

World exports in 2024
$718M
+8.1% vs 2023, imports $915M
2019 to 2024
Top exporters
  1. China46.6%
  2. United States13.7%
  3. Germany10.1%
Top importers
  1. United States16.2%
  2. Denmark11.8%
  3. Germany10.0%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Caprylyl peroxide?

Straw-colored liquid, sharp odor.

What is the CAS number of Caprylyl peroxide?

The CAS registry number of Caprylyl peroxide is 762-16-3.

What is the molecular formula and weight of Caprylyl peroxide?

The molecular formula of Caprylyl peroxide is C16H30O4 and its molar mass is 286.41 g/mol.

What is Caprylyl peroxide used for?

Initiator for suspension or mass polymerization of vinyl chloride monomers.

Is Caprylyl peroxide hazardous?

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

What is the HS code of Caprylyl peroxide?

Caprylyl peroxide is usually classified under HS code 291719 (Acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Caprylyl peroxide?

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What is the price of Caprylyl peroxide?

Suppliers quote Caprylyl 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 Caprylyl 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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