Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

2-Amino-5-mercapto-1,3,4-thiadiazole | CAS 2349-67-9

An amino-functional thiadiazole ligand combining nitrogen and sulfur donor sites, used in published zinc-complex chemistry and investigated for copper corrosion inhibition. Qualification focuses on the free ligand and application-relevant sulfur impurities.

CAS2349-67-9
Molecular formulaC2H3N3S2

Product overview

An amino group and a sulfur-bearing reactive site give this compact thiadiazole two distinct points of chemical interest. The names 2-amino-5-mercapto-1,3,4-thiadiazole and 5-amino-1,3,4-thiadiazole-2-thione describe thiol–thione forms associated with the same compound. Its nitrogen and sulfur atoms support coordination chemistry, while the amino group offers a separate site for derivative development. Buyers evaluating this material for a metal complex or a surface-treatment study should specify the neutral ligand explicitly. Chromatographic purity, identity and the content of metals introduced before use are different qualification questions. Where solution preparation forms part of the application, the agreed solvent and an insoluble-residue criterion can make sample comparisons more meaningful.

Chemical identity

Chemical name
2-Amino-5-mercapto-1,3,4-thiadiazole
CAS number
2349-67-9
Molecular formula
C2H3N3S2

Application context

Published zinc-thiadiazole routes use this compound as the organic ligand from which the zinc complex is prepared. The distinction between starting ligand and isolated metal complex matters when specifying the purchased material.

It has also been investigated for inhibition of copper corrosion in neutral chloride solutions. In that research setting, adsorption and interactions between the heterocycle and the metal surface are central to evaluation. Performance should be assessed for the intended metal, electrolyte and exposure programme. For either coordination or surface work, a buyer can request a chromatographic profile together with relevant metal and insoluble-residue information. These controls help compare lots of the free ligand before incorporating them into a defined complex or test formulation.

Chemistry and synthetic role

The 1,3,4-thiadiazole ring contains two adjacent nitrogen atoms and one sulfur atom. An exocyclic amino group and the thiol/thione site provide different derivatisation and coordination possibilities.

Quality review

Confirm neutral-ligand identity

Match the thiol/thione structural description and distinguish the organic ligand from its zinc complex.

Resolve sulfur-related components

Agree an HPLC method and related-substance limits suitable for the intended ligand chemistry.

Control pre-existing metals

For coordination or electrochemical studies, select metal tests against the target system and state reporting limits.

Preparing a specification

Specify CAS 2349-67-9 as the free ligand, the identity method, HPLC assay and related-substance criteria. Add metal and insoluble-residue limits where complexation or surface evaluation requires them.

Packaging and storage

Reference handling information: TCI identifies this compound as air sensitive. Agree closure, exposure control and package size against the selected material, and follow its actual supplier SDS for storage and transport.

Documentation

Request a batch COA, specification, identity data and SDS. Confirm the availability of the analytical methods and any application-specific impurity results with the proposed supplier.

Procurement questions

Do the thiol and thione names indicate different catalogue substances?

They describe tautomeric representations associated with this compound. Match the complete structure and CAS when comparing quotations.

Is this material the zinc complex?

No. The requested substance is the organic ligand used to prepare the separately identified zinc complex.

Which information helps with corrosion research?

Identify the metal and electrolyte, and request relevant metals, purity and insoluble-residue results for lot comparison.

Technical sources
  1. 2-Amino-5-mercapto-1,3,4-thiadiazole, CID 2723847PubChem
  2. 2-Amino-5-mercapto-1,3,4-thiadiazole A0425TCI
  3. Preparation method of zinc thiazole for reducing impurity contentGoogle Patents / CN109988123B
  4. Inhibition of copper corrosion in chloride solutions by amino-mercapto-thiadiazol and methyl-mercapto-thiadiazolElectrochimica Acta