Is Cyclopentylethylene the same substance as Vinylcyclopentane?

Yes. Vinylcyclopentane, ethenylcyclopentane and cyclopentylethylene identify the structure under CAS 3742-34-5. Ethylidenecyclopentane has a different double-bond arrangement and should not be treated as equivalent. Confirm the complete name, CAS number, structure and GC identity when matching material.

Should inhibitor status be specified when purchasing Vinylcyclopentane?

Yes. Commercial listings include stabilized grades, while other specifications may state only assay and physical properties. Define whether inhibited or uninhibited material is required and, if inhibited, the inhibitor identity and concentration. Also specify GC assay, structural isomers, water, color, peroxide limit where relevant, packing and storage conditions.

Vinylcyclopentane CAS 3742-34-5

Vinylcyclopentane , CAS 3742-34-5 and EC 223-133-8 , is ethenylcyclopentane with molecular formula C7H12 and molecular weight 96.17 g/mol. The correct CAS is 3742-34-5, not 2546-38-5. As an unsaturated hydrocarbon, it may undergo oxidation or polymerization during storage. Buyers should define GC assay, structural isomers, residual cyclopentane derivatives, inhibitor identity and concentration, peroxide status, water, color and storage history.

CAS: 3742-34-5
Synonyms: Vinylcyclopentane, Ethenylcyclopentane, Cyclopentylethylene, Cyclopentane ethenyl-
Einecs: 223-133-8
Molecular Formula: C₇H₁₂
Grade: Confirm identity, GC assay, structural isomers, residual cyclopentane derivatives, inhibitor identity and concentration, peroxide status, water, color and storage history against the current COA and SDS.
Package: State quantity, destination and inhibitor requirement; confirm a compatible sealed container, closure, fill and headspace, temperature and inhibitor controls, transport classification and transfer precautions against the current SDS.

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Product Description

1 Identity and physicochemical profile

2 Applications and grade selection

3 Storage and handling

4 Safety, documentation and procurement

Identity and physicochemical profile

Item	Technical guidance
Product identity	Vinylcyclopentane; ethenylcyclopentane
CAS / EC	3742-34-5 / 223-133-8
Formula / molecular weight	C₇H₁₂ / 96.17 g/mol
Identity correction	CAS 3742-34-5; the previously stated 2546-38-5 does not identify this product
Key purchase controls	Identity, GC assay, structural isomers, residual cyclopentane derivatives, inhibitor, peroxide status, water, color and storage history

Applications and grade selection

Vinylcyclopentane may be evaluated as an unsaturated hydrocarbon intermediate, monomer or comonomer in controlled synthesis and materials research. Polymerization response depends on inhibitor, oxygen, purity, initiator and process conditions.

Confirm whether stabilized or unstabilized material is required and state the inhibitor level.
Set limits for isomers, residual precursors, peroxide status, water and color.
Run polymerization or reaction trials using the intended purification and initiation procedure.

Storage and handling

Keep tightly sealed in compatible packaging under the documented temperature and inhibitor conditions, away from heat, ignition sources, oxidizers and unintended polymerization initiators. Monitor inhibitor and peroxide status as applicable.

Safety, documentation and procurement

Handle as a flammable unsaturated hydrocarbon using ventilation, bonding, grounding and ignition control. Procurement should state inhibitor needs, specification, quantity, package, destination, schedule and documents.

FAQ - Technical & Supply Chain

Q:
Is Cyclopentylethylene the same substance as Vinylcyclopentane?

A: Yes. Vinylcyclopentane, ethenylcyclopentane and cyclopentylethylene identify the structure under CAS 3742-34-5. Ethylidenecyclopentane has a different double-bond arrangement and should not be treated as equivalent. Confirm the complete name, CAS number, structure and GC identity when matching material.
Q:
Should inhibitor status be specified when purchasing Vinylcyclopentane?

A: Yes. Commercial listings include stabilized grades, while other specifications may state only assay and physical properties. Define whether inhibited or uninhibited material is required and, if inhibited, the inhibitor identity and concentration. Also specify GC assay, structural isomers, water, color, peroxide limit where relevant, packing and storage conditions.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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