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Atomfair tert-Pentyl perbenzoate tert-Amyl peroxybenzoate, KD 1, Experox 5100 C12H16O3 CAS 4511-39-1

tert-Pentyl perbenzoate (CAS No. 4511-39-1) is a high-purity organic peroxide with the molecular formula C12H16O3. Also known as 2-methylbutan-2-yl benzenecarboperoxoate , this compound is widely utilized as a free-radical initiator in polymerization reactions. It features a stable yet reactive peroxy group, making it ideal for controlled radical initiation in industrial and research applications. tert-Pentyl perbenzoate is supplied as a clear to pale yellow liquid with a characteristic aromatic odor, ensuring consistent performance in synthetic processes. Suitable for use in thermosetting resins, elastomers, and specialty polymers, this reagent is rigorously tested for purity and stability to meet the stringent demands of…

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Description

tert-Pentyl perbenzoate (CAS No. 4511-39-1) is a high-purity organic peroxide with the molecular formula C12H16O3. Also known as 2-methylbutan-2-yl benzenecarboperoxoate, this compound is widely utilized as a free-radical initiator in polymerization reactions. It features a stable yet reactive peroxy group, making it ideal for controlled radical initiation in industrial and research applications. tert-Pentyl perbenzoate is supplied as a clear to pale yellow liquid with a characteristic aromatic odor, ensuring consistent performance in synthetic processes. Suitable for use in thermosetting resins, elastomers, and specialty polymers, this reagent is rigorously tested for purity and stability to meet the stringent demands of researchers and scientists.

Properties

  • CAS Number: 4511-39-1
  • Complexity: 205
  • IUPAC Name: 1,1-dimethylpropyl benzenecarboperoxoate
  • InChI: InChI=1S/C12H16O3/c1-4-12(2,3)15-14-11(13)10-8-6-5-7-9-10/h5-9H,4H2,1-3H3
  • InChI Key: RFSCGDQQLKVJEJ-UHFFFAOYSA-N
  • Exact Mass: 208.109944368
  • Molecular Formula: C12H16O3
  • Molecular Weight: 208.25
  • SMILES: CCC(C)(C)OOC(=O)C1=CC=CC=C1
  • Topological: 35.5
  • Monoisotopic Mass: 208.109944368
  • Physical Description: Liquid
  • Synonyms: 4511-39-1, Benzenecarboperoxoic acid, 1,1-dimethylpropyl ester, tert-Amyl peroxybenzoate, KD 1 (peroxide), Experox 5100, tert-Pentyl perbenzoate, ESP 5100, EINECS 224-831-5, DTXSID2063503, DTXCID5040382, 224-831-5, 2-methylbutan-2-yl benzenecarboperoxoate, t-amylperoxybenzoate, SCHEMBL25264, 78VCF48V7F, DB-221890, NS00031484

Application

tert-Pentyl perbenzoate is primarily employed as a polymerization initiator for vinyl monomers, acrylics, and styrenics, enabling controlled radical reactions at moderate temperatures. It is also used in the curing of unsaturated polyester resins and as a crosslinking agent in elastomer production. Additionally, this peroxide finds applications in organic synthesis for the introduction of benzoyloxy radicals.

Safety and Hazards

GHS Hazard Statements

  • H226 (16.7%): Flammable liquid and vapor [Warning Flammable liquids]
  • H242 (16.7%): Heating may cause a fire [Danger Self-reactive substances and mixtures; Organic peroxides]

Precautionary Statements

  • P210, P233, P234, P235, P240, P241, P242, P243, P280, P303+P361+P353, P370+P378, P403, P403+P235, P410, P411, P420, and P501

Hazard Classes and Categories

  • Flam. Liq. 3 (16.7%)
  • Org. Perox. C (16.7%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.

Disclaimer

Intended Use & Restrictions

This product is sold exclusively for laboratory research, analytical testing, or non-commercial purposes.

  • Strictly prohibited: Resale, repackaging, or formulation into commercial products.
  • Not approved for human/animal use, diagnostics, or manufacturing (including pharmaceuticals, agrochemicals, or consumer goods).

Patent & Regulatory Compliance

Certain molecules may be protected by active patents or regulatory restrictions.

  • Buyers must independently verify patent status (e.g., via USPTO/EPO/CNIPA) and comply with local laws.
  • Atomfair LLC does not provide legal assurances regarding patent non-infringement or jurisdictional compliance.

Liability Release

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  • Use this product only as permitted by law.
  • Indemnify Atomfair LLC against all claims arising from misuse, patent infringement, or regulatory violations.

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