Industrial, Polymerization & High Purity Grade tert-Dodecyl Mercaptan (TDM/TDDM) CAS 25103-58-6 Molecular Weight Regulator for ABS, SBR & Polymer Synt

tert-Dodecyl Mercaptan (Abbr: TDM / TDDM, also named tert-Dodecanethiol, CAS: 25103-58-6, EINECS: 246-619-1, HS Code: 2930909090) is a colorless to pale yellow transparent oily liquid with characteristic mercaptan odor, a high-efficiency chain transfer agent of the thiol family. We supply industrial grade products with high purity complying with international quality standards. It is insoluble in water and fully miscible with alcohols, ethers, ketones, benzene and most organic solvents, featuring stable chain transfer efficiency and uniform molecular weight regulation performance. Widely used as molecular weight regulator in synthetic rubber, resin polymerization, and as raw material for lubricant additives, fine chemicals and pharmaceutical intermediates.

Applications
Synthetic Rubber & Resin Industry (Core Application)
High-performance molecular weight regulator (chain transfer agent) for the production of styrene-butadiene rubber (SBR), ABS resin, nitrile rubber (NBR) and high-impact polystyrene (HIPS). It precisely controls polymer chain growth, narrows molecular weight distribution, reduces chain branching degree, and effectively improves the melt fluidity, processing performance and mechanical toughness of final products, being an essential auxiliary in free radical polymerization processes.
Polyolefin Plastics Industry
Used as thermal stabilizer and antioxidant for polyvinyl chloride (PVC), polyethylene (PE) and polypropylene (PP). It inhibits thermal oxidative degradation during processing and long-term use, improves product weather resistance and aging resistance, and extends the service life of plastic products.
Lubricant & Petroleum Additives
Key raw material for manufacturing lubricant additives, including extreme pressure anti-wear agents, anti-oxidants and rust inhibitors. It improves the load-bearing capacity and oxidation stability of lubricating oils, reduces equipment wear, and extends the service life of industrial lubricants and metalworking fluids.
Surfactant & Fine Chemicals
Important intermediate for synthesizing nonionic surfactants, fungicides, insecticides and oilfield chemicals. Its mercapto group can participate in various organic reactions to produce functional fine chemical products, widely used in daily chemical, textile and industrial cleaning fields.
Pharmaceutical & Agrochemical Intermediates
Applied as raw material for the synthesis of pharmaceutical ingredients, pesticide active ingredients and bactericides. It is used to produce sulfur-containing fine chemicals with specific biological activity, supporting the R&D and production of pharmaceutical and agrochemical products.
Oilfield & Metal Processing
Used as corrosion inhibitor for oil well acidification and oilfield exploitation, and as extreme pressure additive for metal cutting fluids. It reduces equipment corrosion in harsh environments, improves metal processing surface finish, and enhances processing efficiency and tool service life.

Product Advantages
✅ Efficient molecular weight regulation: Precise control of polymer molecular weight and distribution, significant improvement of product processing and mechanical properties
✅ High purity & stable quality: ≥98.5% mercaptan content with low impurities, consistent batch performance, suitable for large-scale continuous production
✅ Excellent solubility: Fully miscible with most organic solvents and polymerization monomers, uniform dispersion, high reaction efficiency
✅ Moderate reaction activity: Stable chain transfer efficiency, controllable reaction process, small product performance fluctuation
✅ Multi-functional application: Integrates chain transfer, antioxidant, anti-rust and other properties, covering a wide range of industrial scenarios
✅ Reliable supply guarantee: Mature production capacity and stable supply chain, supporting long-term bulk procurement with competitive price

Packaging & Storage
Standard packaging: 190kg sealed galvanized steel drums, or 1000kg IBC tanks for bulk orders. Store in a cool, dry and well-ventilated warehouse at 5–30°C. Keep containers tightly sealed, away from open flames, heat sources, strong oxidants and direct sunlight. Shelf life is 24 months under proper storage conditions.
Safety Information
Classified as flammable and irritant substance for transportation. The product has a strong characteristic odor, and may cause irritation to skin, eyes and respiratory tract. Keep away from heat and open flames during handling and storage. Wear protective gloves, goggles and respiratory protection. In case of contact, rinse immediately with plenty of clean water and seek medical attention if necessary. Complete MSDS and relevant qualification certificates are available upon request.

1. 1.A 70,000 ㎡ warehouse (20,000 MT capacity) with moisture-proof and temperature-controlled systems, enabling efficient fulfillment of large-volume orders.
2. 2.Free samples (Ship within 3-7 days) to let you test products at zero trial cost.
3. 3.Transparent lead time for hazardous chemicals: 45–60 days, with clear delivery schedules.
4. 4.Certified with a Hazardous Chemical Business License and ISO certification, ensuring smooth customs clearance.
5. 5.6 packaging options with customizable logos to minimize product loss during transportation.
6. 6.Over 400 chemical SKUs available for one-stop procurement, helping you reduce sourcing costs.