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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Bis(2-mercapto-1,3,4-thiadiazol-5-yl) disulfide | CAS 72676-55-2

A disulfide-linked thiadiazole additive found in lubricant formulations, where the parent-to-dimer distribution and incorporation into the carrier are key qualification points.

CAS72676-55-2
Molecular formulaC4H2N4S6
Molecular weight298.5 g/mol

Product overview

Often called DMTD dimer, this compound joins two thiadiazole units through a disulfide bond while retaining sulfur functionality on the rings. It is chemically distinct from free DMTD. Specifying only sulfur content or a generic thiadiazole additive name can obscure this difference, so an identity-linked assay and related-species profile are useful starting points for procurement.

Chemical identity

Chemical name
Bis(2-mercapto-1,3,4-thiadiazol-5-yl) disulfide
CAS number
72676-55-2
Molecular formula
C4H2N4S6
Molecular weight
298.5 g/mol

Application context

This sulfur-containing thiadiazole derivative is a component of lubricating-grease formulations. It is relevant to the development of sulfur-containing additive packages, with suitability assessed in the actual base fluid and co-additive system. Determine the treat rate through formulation trials with the selected base fluid and co-additives. Buyers should agree whether the material is supplied as the isolated compound or as a preparation in a carrier.

Chemistry and synthetic role

The intermolecular S–S linkage defines the dimer. Residual parent DMTD and other sulfur-coupled species require a species-selective assessment.

Quality review

Dimer composition

Agree an assay that distinguishes the target dimer from parent DMTD and related species.

Delivery form

Confirm whether the quotation covers neat material or a carrier-based preparation and state active-content basis.

Incorporation behavior

For dispersions or solids, assess particle or insoluble-residue criteria in relation to the actual mixing process.

Preparing a specification

Specify the disulfide-linked dimer by CAS, assay basis, parent DMTD limit, delivery form and carrier-compatibility requirements.

Packaging and storage

Confirm container compatibility, closure and net weight for the selected grade and destination. Follow the actual supplier SDS and batch label for storage and transport.

Documentation

Request the batch COA, SDS and analytical methods covering the agreed purchasing specification. Confirm which supporting chromatograms and application-specific records are available from the selected manufacturer.

Procurement questions

Is this free DMTD?

No. It contains two thiadiazole units linked by a disulfide bond.

Does total sulfur identify the dimer?

No. Parent and related sulfur compounds also contribute to total sulfur.

Is there a universal lubricant dosage?

The required concentration depends on the complete lubricant formulation and its validation.

Technical sources
  1. PubChem CAS identity lookupNCBI / PubChem
  2. perma LOAD L-M 100-2 SF02 SDSperma-tec
  3. Thiadiazole derivatives / DM89Vanflex