Overview
Tellurium diethyldithiocarbamate (CAS 20941-65-5 ) is an organometallic accelerator used in rubber vulcanization and polymer processing. It delivers exceptionally fast cure rates at low temperatures.
This chemical is a preferred choice where conventional sulfur accelerators fall short. In rubber compounding, it functions as an ultra-accelerator for natural and synthetic rubber types.
It enables low-temperature vulcanization in products such as latex goods, sponge rubber, and extruded profiles. Cable insulation manufacturers use it where rapid, controlled crosslinking is required.
In polymer systems, it acts as a polymerization initiator and catalyst. This supports the production of specialty elastomers with defined molecular weight targets for industrial use.
Tire and industrial rubber goods producers select it when cure speed and scorch safety must be balanced. It is effective against demanding performance specifications in modern manufacturing.
The product is supplied as a grey to yellow powder or as pre-dispersed rubber masterbatch forms. These formats allow for easier incorporation into various compound recipes and batches.
Technical grade is the standard market offering for this material. Purity specifications are typically confirmed by active ingredient content and metal assay to ensure consistency.
Packaging is available in multi-kilogram quantities suited to industrial compounding operations. This ensures a reliable supply chain for large-scale rubber and polymer production facilities.
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Physical Properties
| Melting Point | 108-109 °C |
| Density | 1.55 g/cm³ |
| Form | solid |
| Water Solubility | <0.01 g/100 mL at 23 ºC |
| Vapor Pressure | 0Pa at 20℃ |
| Log P | 4.39 at 25℃ |
Safety & Handling
Danger GHS06 GHS09 Hazard Statements H331 Toxic if inhaled H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P316 Get emergency medical help immediately. P321 Specific treatment (see … on this label). P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P403+P233 Store in a well-ventilated place. Keep container tightly closed.
Other Names
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Chemical Properties
- CAS Number
- 20941-65-5
- EC Number
- 244-121-9
- Mol. Weight
- 720.7
- Category
- Organometallic Compounds