Диэтилдитиокарбамат кадмия

Description

Cadmium diethyldithiocarbamate is an organometallic complex salt, a cadmium dithiocarbamate complex. It is used as an ultra-accelerator for rubber vulcanization.

Basic Attributes

• CAS No.: 14239-68-0
• Chemical formula: C10H20CdN2S4
• Molecular weight: 408.95
• Exact weight: 409.954285
• EU number: 238-113-4
• DSSTox ID: DTXSID6020228
• PSA specifications: 72.7
• XLogP3: 3.0833

Physico-chemical properties

• Color/Shape: White to cream colored rods
• Appearance: white or light yellow powder
• Density: 1.39 g/cm3
• Melting point: 68–76 °C
• Boiling point: 94.3 °C
• Solubility in water: insoluble
• Storage conditions: Store in a cool, dry and dark place in a tightly closed container or cylinder, away from incompatible materials, sources of ignition and unauthorized persons; protect containers from physical damage

Scope of application

Known as an ultra-accelerator for rubber vulcanization under the brand name CED (Cadmium diethyldithiocarbamate). Used in butyl rubber roofing materials, rubber tank lining sheets and other products requiring ultra-fast vulcanization. Previously it was also considered as a component of stabilizers for polyvinyl chloride, although cadmium stearates were more often used for this purpose.

Mechanism of action as an accelerator

Dithiocarbamate complexes of metals, including cadmium, belong to the class of so-called ultra-accelerators of sulfur vulcanization: the metal atom coordinates two dithiocarbamate groups through sulfur atoms, and the complex itself easily decomposes at the vulcanization temperature with the release of reactive sulfur-containing fragments that initiate cross-linking of the polymer chains of rubber. Compared to zinc dithiocarbamates, the cadmium analogue provides a faster onset of vulcanization, which is in demand in the production of thick-walled rubber products where rapid curing throughout the entire volume is required.

Toxicity

• LD50 intraperitoneal, mice: 650 mg/kg
• Recognized as a confirmed carcinogen for humans based on experimental tumorigenic data

Flammability characteristics

Highly flammable; When heated, toxic nitrogen oxides and sulfur oxides are formed.

Safety Information

• Packing level: III
• Hazard category: 6.1(b)
• Transport codes: 2570

Storage and transportation conditions

Store in a cool, dry and dark place, in a tightly closed container, away from incompatible materials and sources of ignition. Protect the container from physical damage and mark the storage location. Considering the carcinogenicity and highly flammable nature of the substance, personal protective equipment and the exclusion of open flame sources are required when working. Transport code 2570 covers a wide range of cadmium compounds, which requires careful verification of the accompanying documentation when shipping the batch to the customer.