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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Cinnamyl chloride | CAS 2687-12-9

An aromatic allylic chloride for introducing a cinnamyl fragment, with alkene geometry and stabilization status central to selecting material for substitution and carbon–carbon bond formation.

CAS2687-12-9
Molecular formulaC9H9Cl
Molecular weight152.62 g/mol

Product overview

A phenyl group, an alkene and a terminal chloromethyl group define the cinnamyl fragment. CAS 2687-12-9 is associated with the trans form, so an order described only as an aromatic chloride leaves a key structural distinction unresolved. The chlorine is on an allylic carbon rather than directly on the benzene ring. This arrangement supports the use of cinnamyl chloride in substitution and organometallic chemistry. Buyers should distinguish total chromatographic purity from the proportion of the required alkene isomer and establish whether the selected material contains a stabilizer.

Chemical identity

Chemical name
Cinnamyl chloride
CAS number
2687-12-9
Molecular formula
C9H9Cl
Molecular weight
152.62 g/mol

Application context

Cinnamyl chloride appears in published aldehyde coupling studies and in preparative work on cinnamyl organometallic reagents. These applications exploit the three-carbon unsaturated side chain to assemble more complex carbon frameworks. For a process that transfers this fragment, the position of the double bond and the point of attachment in the resulting product matter alongside conversion. Natural-product synthesis is one documented research setting. Qualification should therefore use the intended reaction and its impurity requirements, including alkene-isomer control and any effects of stabilization on subsequent chemistry.

Chemistry and synthetic role

The chloromethyl carbon is adjacent to a carbon–carbon double bond conjugated with phenyl. Allylic connectivity and E geometry distinguish this reagent from chlorostyrenes and saturated phenylpropyl chlorides.

Quality review

Define the E-isomer requirement

Specify how the trans/cis ratio is measured rather than relying on a total GC area result.

Identify stabilization

Confirm whether a stabilizer is present and assess its compatibility with the intended conversion.

Review related allylic compounds

Agree limits for route-relevant organic impurities, including cinnamyl alcohol where relevant, with a method that separates them.

Preparing a specification

State trans-isomer content, GC method, assay basis and stabilization status. Add water and related allylic-compound limits according to the planned reaction.

Packaging and storage

Packaging and net weight are agreed for the selected grade, order quantity and destination. Check the actual supplier SDS and label for storage and transport requirements.

Documentation

Request a batch COA, SDS and the analytical methods for the acceptance criteria below. Confirm which supporting chromatograms and identity data are available from the selected manufacturer.

Procurement questions

Does GC purity establish the trans content?

Only if the method resolves the alkene isomers and reports their ratio.

Is every grade supplied in the same stabilized form?

No. Stabilization belongs in the material description and must be confirmed for the selected grade.

Why review the alcohol impurity?

It has a different leaving group and can change reagent consumption or the impurity profile of a downstream reaction.

Technical sources
  1. PubChem CID 639658NCBI / PubChem
  2. Cinnamyl chloride, transThermo Fisher Scientific
  3. Cinnamyl chloride applications and literatureThermo Fisher Scientific