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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

3-Chloroaniline | CAS 108-42-9

A meta-chlorinated aromatic amine used in published carbamate synthesis and studied as a degradation analyte, requiring positional-isomer control and a clear distinction between synthetic feedstock and quantitative reference material.

CAS108-42-9
Molecular formulaC6H6ClN
Molecular weight127.57 g/mol

Product overview

The chlorine atom sits meta to the primary amino group in CAS 108-42-9. This arrangement is retained when the amine is incorporated into a carbamate or related derivative, distinguishing the material from the ortho and para chloroanilines. The free base has a different content basis from a salt or a prepared analytical solution. For synthesis, qualification should establish the meta identity, chemical assay and the impurity profile relevant to the source route. For analytical work, the assigned amount of analyte and the method’s ability to separate related chlorinated aromatics become additional requirements. The intended use should therefore accompany the exact compound name in the purchasing specification.

Chemical identity

Chemical name
3-Chloroaniline
CAS number
108-42-9
Molecular formula
C6H6ClN
Molecular weight
127.57 g/mol

Application context

Published chlorpropham chemistry uses 3-chloroaniline as the amine component for a 3-chlorophenyl carbamate. The meta-chloro aromatic fragment is supplied by this starting material, so its positional composition matters directly to the structure assembled. A synthetic-material enquiry should identify the receiving carbamate chemistry and the analytical separation needed for the relevant chloroaniline isomers.

3-Chloroaniline is also investigated in biodegradation studies and as a transformation product associated with chlorpropham. In this research context, it serves as a defined analyte or challenge substrate. Quantitative experiments require a documented concentration basis, appropriate blank controls and characterization suitable for the measurement. Those requirements should be specified separately from the acceptance criteria for bulk synthetic feedstock, even though the CAS identity is the same.

Chemistry and synthetic role

The primary amine supplies nitrogen for derivative formation while the meta C–Cl substitution defines the aromatic fragment. Total chlorine alone does not identify the relative positions of these groups.

Quality review

Distinguish the meta isomer

Use a selective identity and chromatographic method for 2-, 3- and 4-chloroaniline where those isomers are relevant.

Review route-related aromatics

Ask which residual starting materials and related chlorinated compounds are monitored; agree limits against the source process.

Establish analytical concentration

For degradation studies or calibration, define assigned content, solution basis and suitability of the reference material.

Preparing a specification

Specify free 3-chloroaniline, isomer purity, assay method and route-related impurity limits. For analytical use, add concentration, value-assignment and matrix requirements.

Packaging and storage

Confirm the proposed container and closure together with the current supplier SDS. Handling, storage and shipment must follow the selected material’s documentation.

Documentation

Request identity, COA, SDS and chromatographic data. Confirm precursor-impurity assignments or analytical reference-value documentation according to the enquiry.

Procurement questions

Is 3-chloroaniline interchangeable with the para isomer?

No. The relative chlorine and amino positions define different aromatic building blocks.

Why specify free base or solution?

The chemical form and solvent determine how the weighed or dispensed quantity relates to analyte content.

What matters for biodegradation experiments?

Use a documented concentration and characterization appropriate to the analytical method, with experimental blanks defined.

Technical sources
  1. PubChem CAS-resolved identity, CID 7932NCBI / National Library of Medicine
  2. 3-Chloroaniline C22407Sigma-Aldrich
  3. Chlorpropham research thesis: synthesis contextUniversity of Glasgow
  4. Wide substrate range for a candidate bioremediation enzymeOriginal research / PMC