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1072-71-5 - 2,5-Dimercapto-1,3,4-thiadiazole, 97% (dry wt.), water <3% - Bismuthiol I - 1,3,4-Thiadiazole-2,5-dithiol - A12615 - Alfa Aesar

A12615 2,5-Dimercapto-1,3,4-thiadiazole, 97% (dry wt.), water <3%

CAS Number
Bismuthiol I

Size Price ($) Quantity Availability
50g 36.30
250g 162.00
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2,5-Dimercapto-1,3,4-thiadiazole, 97% (dry wt.), water <3%


Chemical Properties

Formula Weight
Melting point
ca 162° dec.
Soluble in water.


2,5-Dimercapto-1,3,4-thiadiazole is used in synthesizing polymers and heavy metal and basic salts. It acts as an additive in lubricating oils, greases and in electrode compositions. It also acts as an intermediate for pharmaceuticals and dyes, as a chelating agent in the analysis of metals. It also serves as an anticorrosion and antirust agent.


Incompatible with strong oxidizing agents and strong acids.

Literature References

Reagent for bismuth.


Pan, Y- C.; Wen, Y.; Xue, L-Y.; Guo, X-Y.; Yang, H-F. Adsorption Behavior of Methimazole Monolayers on a Copper Surface and Its Corrosion Inhibition. J. Phys. Chem. C 2012,116 (5), 3532-3538.

Chen, W.; Luo, H. Q.; Li, B. N. Inhibition effects of 2,5-dimercapto-1,3,4-thiadiazole on the corrosion of mild steel in sulphuric acid solution. Corros. Sci. 2011,53 (10), 3356-3365.

Pan, Y-C.; Wen, Y.; Guo, X-Y.; Song, P.; Shen, S.; Du, Y-P.; Yang, H-F. 2-Amino-5-(4-pyridinyl)-1,3,4-thiadiazole monolayers on copper surface: Observation of the relationship between its corrosion inhibition and adsorption structure. Corros. Sci. 2013, 73,274-280.

Rodríguez-Calero, G. G.; Conte, S.; Lowe, M. A.; Gao, J.; Kiya, Y.; Henderson, J. C.; Abruña, H. D. Synthesis and Characterization of Poly-3,4-ethylenedioxythiophene/2,5-Dimercapto-1,3,4-thiadiazole (PEDOT-DMcT) Hybrids. Electrochim. Acta. 2015, 167, 55-60.

GHS Hazard and Precautionary Statements

Hazard Statements: H315-H319-H335

Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Precautionary Statements: P261-P280-P305+P351+P338-P304+P340-P362-P312-P321-P405-P403+P233-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Take off contaminated clothing and wash before reuse. Call a POISON CENTER or doctor/physician if you feel unwell. Specific treatment (see label). Store locked up. Store in a well-ventilated place. Keep container tightly closed. Dispose of contents/container in accordance with local/regional/national/international regulations.

Other References

Harmonized Tariff Code


  • A10435

    L-Cysteine, 98+%
  • A15713

    Sodium phosphate dodecahydrate, 97%
  • A16037

    Sodium hydroxide, pellets, 98%
  • A17546

    Sodium pyrophosphate, 98%
  • 11591

    Sodium dihydrogen phosphate monohydrate, ACS, 98.0-102.0%

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