Product Description
Basic Information
- Product Name: 2,5-Dimercapto-1,3,4-thiadiazole (DMTD)
- Chemical Formula: C2H4N2S3
- Molar Mass: 152.26 g/mol
- CAS Number: 1072-71-5
- Appearance: Typically a white to light yellow crystalline powder
- Odor: Characteristic mercaptan-like smell
- Solubility: Slightly soluble in water; readily soluble in organic solvents such as ethanol, acetone, and dimethyl sulfoxide (DMSO)
Chemical Properties
- Reactivity of Mercapto Groups
- The two mercapto (-SH) groups exhibit strong nucleophilicity, readily forming stable coordination compounds with metal ions (e.g., Cu², Fe³, Zn²), demonstrating excellent metal chelating ability.
- Prone to oxidation, forming disulfides (e.g., bis(2,5-dimercapto-1,3,4-thiadiazole)) in air or under oxidizing conditions.
- Heterocyclic Stability
- The thiadiazole ring (a five-membered heterocycle containing N and S atoms) shows moderate chemical stability, resistant to high temperatures and acid-base environments, making it suitable for applications in harsh conditions.
- Complexing Ability
- Binds to metal surfaces through mercapto groups and heterocyclic nitrogen atoms, forming a dense protective film to inhibit corrosion.
Applications
- Metal Corrosion Inhibitor
- Widely used in petrochemical, electroplating, and water treatment industries, providing significant corrosion protection for metals like copper, iron, and aluminum. Examples include:
- As an additive in lubricants to prevent corrosion of metal components;
- In acidic media (e.g., hydrochloric acid, sulfuric acid) for corrosion inhibition during metal pickling.
- Polymer Additive
- Acts as an antioxidant and vulcanization accelerator in rubber and plastics, enhancing material resistance to aging and mechanical strength.
- Used as a stabilizer in polyurethanes and epoxy resins to inhibit thermo-oxidative degradation.
- Pharmaceuticals and Biology
- Some derivatives exhibit antibacterial and antiviral activities, serving as intermediates in pharmaceutical synthesis.
- The chelating ability of mercapto groups is studied for heavy metal detoxification (e.g., mercury, lead poisoning).
- Electroplating and Surface Treatment
- Addition of DMTD to electroplating baths improves coating uniformity and adhesion, reducing pinholes and cracks.
Safety and Precautions
- Toxicity:
- Mercapto groups are irritating; inhalation or skin contact may cause allergic reactions. The oral LD50 for rats is approximately 800 mg/kg (low toxicity).
- Protection:
- Wear gloves and masks during handling to avoid direct contact with skin and mucous membranes;
- Store in a cool, dry place away from oxidizers and strong acids.
- Environmental Impact:
- High sulfur content requires proper wastewater treatment to prevent harm to aquatic life.
Product Parameters
Packaging & Shipping
Liquid products |
Drum of 5kg ,10 kg ,25 kg ,50 kg 200 kg ,250 kg . 1000 kg IBC drum. TANK with 20 tons ,25 tons . |
Solid products |
Bag of 1 kg ,2 kg ,5 kg ,25 kg ,500kg ,1000 kg . Drum of 25 kg and 50 kg. |
Packaging can be customized according to customer requirements.
Company Profile
Qingdao Jinyu Chemical Co., LTD,which is located in Qingdao City, China, with registered capital of RMB 10 million, is a dynamic chemical import and export enterprise with customer demand as its own responsibility. The founder has been engaged in the chemical industry for more than 20 years. With professional technical and marketing personnel, diversified cooperative factories with synthetic technology and efficient logistics management, we provide services to customers all over the world. After years of hard work, we have selected a number of excellent chemical production cooperative enterprises in China. These enterprises have their own advantages in different chemical synthesis fields. They have passed the strict inspection of suppliers by many customers and formed a long-term and stable strategic partnership with customers. With our partners' excellent equipment, well-trained employees and mature technology, we also continue to provide customers with more products.




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