Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

2-Chlorobenzothiazole | CAS 615-20-3

A benzothiazole electrophile with chlorine at the carbon between nitrogen and sulfur, reported in substituted benzothiazole research, where positional identity and the inspection temperature of a low-melting material deserve specific attention.

CAS615-20-3
Molecular formulaC7H4ClNS
Molecular weight169.63 g/mol

Product overview

The chlorine atom in 2-chlorobenzothiazole is attached to C2 between the nitrogen and sulfur atoms of the fused heterocycle. This position provides a site for constructing substituted benzothiazoles in medicinal-chemistry and heterocycle research. Reported syntheses include lubeluzole and benzothiazolyl aminoacridinone derivatives. A practical incoming-inspection consideration is the melting range near usual room temperature: appearance should be recorded together with the inspection temperature. Qualification combines the C2 structural identity, a relevant impurity profile and defined conditions for judging solid or liquid form.

Chemical identity

Chemical name
2-Chlorobenzothiazole
CAS number
615-20-3
Molecular formula
C7H4ClNS
Molecular weight
169.63 g/mol

Application context

2-Chlorobenzothiazole is used in reported preparations of racemic and (S)-lubeluzole, benzothiazolyl aminoacridinones and fused thienopyrimidobenzothiazole derivatives. The starting C2-chloro scaffold supports different routes for building these heterocyclic structures. For a selected transformation, agree which related benzothiazoles the analytical method needs to resolve. Also define the temperature for appearance inspection: partial solidification or melting should be assessed alongside identity and composition results. The parent building block itself is achiral, so stereochemical requirements belong to the appropriate downstream intermediate.

Chemistry and synthetic role

C2 is the carbon between the ring nitrogen and sulfur. Its chlorine provides a distinct functionalisation site on an otherwise fused aromatic skeleton. A chlorine substituted onto the benzene ring would define a different starting material.

Quality review

Locate the chlorine at C2

Confirm the structure rather than relying on a generic chlorobenzothiazole name or molecular formula.

Review the benzothiazole impurity profile

Agree GC or another suitable assay with defined related-compound reporting; an appearance result alone cannot establish identity.

Define appearance-check conditions

External references describe a low-melting material. Record inspection temperature and physical form so that phase changes are not confused with composition changes.

Preparing a specification

Specify CAS 615-20-3, the C2-chloro parent, identity and assay methods, related benzothiazoles and the conditions for judging physical form. Add water or solvent requirements only when relevant to the selected downstream transformation.

Packaging and storage

Packaging format, closure and net weight should be agreed for the selected grade, order quantity and destination. Request the actual supplier SDS and confirm its storage and transport instructions before receipt.

Documentation

Request COA, specification and the actual supplier SDS. Confirm availability of identity spectra and a representative chromatogram; ensure appearance records state the inspection conditions when physical form is a qualification issue.

Procurement questions

Does “chlorobenzothiazole” identify the right position?

Not by itself. The request should explicitly state 2-chlorobenzothiazole and CAS 615-20-3.

Does the parent compound require an enantiomeric-purity test?

2-Chlorobenzothiazole is achiral. Apply stereochemical tests to the chiral downstream intermediate specified by the route.

Is partial solidification automatically an impurity problem?

No. Evaluate the temperature and the external low-melting reference alongside chemical identity and assay results.

Technical sources
  1. PubChem CID 11987NCBI / PubChem
  2. 2-Chlorobenzothiazole 167576Sigma-Aldrich
  3. 2-Chlorobenzothiazole A17762Thermo Fisher Scientific