Perodox® EHP - Di(2-ethylhexyl) Peroxydicarbonate

Di(2-ethylhexyl) peroxydicarbonate (DEHPD) is an organic peroxide with the CAS registry number 16111-62-9. It is primarily used as a free-radical initiator​ in the polymerization of vinyl chloride and other monomers

The unique CAS number for Di(2-ethylhexyl) peroxydicarbonate is 16111-62-9​

The molecular formula for Di(2-ethylhexyl) peroxydicarbonate is C₁₈H₃₄O₆​

The molecular weight of Di(2-ethylhexyl) peroxydicarbonate is 346.46 g/mol​

Its primary application is as a high-efficiency initiator​ for the suspension and emulsion polymerization of vinyl chloride​ to produce Polyvinyl Chloride (PVC)

DEHPD must be stored below -20°C​ in a cool, well-ventilated area, away from heat sources, sparks, and incompatible materials like reducing agents, acids, and bases. It is often supplied as a solution in organic solvents for safe handling

The half-life of Di(2-ethylhexyl) peroxydicarbonate is 10 hours at 44°C​ when measured in toluene

The theoretical active oxygen content of Di(2-ethylhexyl) peroxydicarbonate is 4.62%​

Yes, DEHPD demonstrates good solubility in common vinyl monomers like vinyl chloride and methyl methacrylate, as well as in organic solvents, which facilitates its use in polymerization processes

Key safety precautions include wearing appropriate Personal Protective Equipment (PPE), avoiding contact with heat and ignition sources, using non-metallic tools to prevent catalytic decomposition, and ensuring adequate ventilation. It is a thermally unstable compound that can decompose explosively if heated under confinement

Yes, Di(2-ethylhexyl) peroxydicarbonate is an effective initiator for the polymerization of methyl methacrylate (MMA)​ and other acrylate monomers, used in producing acrylic sheets, molding compounds, and coating

It typically appears as a clear, colorless to pale yellow liquid

Due to its relatively low half-life temperature, DEHPD efficiently generates free radicals at moderate temperatures, making it ideal for controlling polymerization kinetics and producing polymers with specific molecular weights

The decomposition temperature for DEHPD is typically above 30°C, which is why strict temperature control during storage and transport is critical

DEHPD is often favored for its balance of reactivity and handling safety​ in specific applications like PVC production. Different peroxydicarbonates have varying decomposition rates and solubility profiles

The primary industries are the plastics and polymers industry, specifically PVC production, and the synthetic resins industry​ for acrylics and other specialty polymers

High-purity grades of Di(2-ethylhexyl) peroxydicarbonate are typically available with a purity of ≥ 95%, as determined by HPLC analysis

No, DEHPD is an azo compound​ that decomposes thermally to generate free radicals; it generally does not require additional chemical activators to initiate polymerization

The concentration varies based on the desired molecular weight and reaction rate but typically ranges from 0.01% to 0.5%​ relative to the monomer mass. The exact amount is determined by process engineers

Yes, it is effectively used in the copolymerization of vinyl chloride with other monomers like vinyl acetate or acrylates to modify polymer properties

In case of eye contact, immediately flush eyes with plenty of water for at least 15 minutes, holding eyelids open. Seek immediate medical attention

For fires involving DEHPD, use water spray, fog, foam, or dry chemical​ extinguishers. Do not use a direct water jet as it may spread the material

Quality is controlled through analytical methods like iodometric titration​ for active oxygen content and HPLC​ for purity and assay, ensuring batch-to-batch consistency

When stored under recommended conditions (below 25°C), DEHPD typically has a shelf life of 3 to 6 months. Prolonged storage or exposure to higher temperatures accelerates decomposition

Yes, it is classified as a flammable liquid and a reactive substance​ under transport regulations (e.g., UN Class 3/4.2). It must be shipped with appropriate hazard labels and under controlled temperatures

DEHPD is toxic to aquatic life​ and may cause long-term adverse effects in the aquatic environment. Spills must be contained to prevent environmental contamination

Minimum PPE includes chemical-resistant gloves, safety goggles or a face shield, and a flame-retardant lab coat. Respiratory protection may be needed if ventilation is insufficient

Absolutely, Di(2-ethylhexyl) peroxydicarbonate is a common initiator for both suspension and emulsion polymerization​ processes for PVC and other latexes

Key properties include its state as a liquid at room temperature, molecular weight of 346.46 g/mol, and a theoretical active oxygen content of 4.62%

Decomposition is monitored indirectly by tracking reaction exotherm, pressure changes, and monomer conversion rates​ using process analytical technology (PAT)

As an initiator, DEHPD influences the molecular weight distribution and degree of polymerization, which directly affects the final polymer's mechanical strength, thermal stability, and processability

The half-life of Di(2-ethylhexyl) peroxydicarbonate is 1 hour at 65°C​ in toluene

Upon thermal decomposition, DEHPD primarily produces carbon dioxide, alkoxy radicals, and 2-ethylhexanol, which initiate the polymerization reaction

Yes, it is generally compatible with stainless steel (304 and 316), but contact with carbon steel, copper, or brass alloys should be avoided as they can catalyze decomposition

As an organic peroxide, DEHPD does not have a standard flash point but is considered a flammable liquid​ due to its susceptibility to spontaneous combustion when heated

Generally, a higher initiator concentration​ like DEHPD leads to a higher number of polymer chains​ and a lower average molecular weight​ of the PVC produced

The demand for DEHPD is closely tied to the PVC market, which shows steady growth, particularly in the construction and packaging sectors in developing economies

While its primary function is as an initiator for chain-growth polymerization, under specific conditions, peroxides like DEHPD can participate in crosslinking reactions​ of unsaturated polymers

It is typically packaged in stainless steel or polyethylene-lined containers​ to minimize contamination and risk, often in sizes from 1 kg to 200 kg drums

High-Performance Liquid Chromatography (HPLC)​ is the standard technique for assaying the purity and concentration of Di(2-ethylhexyl) peroxydicarbonate

Waste or degraded DEHPD should be disposed of as hazardous waste​ through incineration by a licensed waste management company, following local regulations

In large PVC plants, it is often pumped as a metered solution​ directly from its storage container into the reactor under controlled conditions

Compliance involves adhering to regulations for the storage, transport, and handling of organic peroxides​ as per OSHA, REACH, and other regional safety standards

As a liquid, its viscosity is relatively low, but the exact value depends on the temperature and whether it is supplied as a pure compound or in a solution

Polymers produced using DEHPD may be used in food-contact applications provided they comply with relevant migration limits and regulations, such as those from the FDA

The primary cost drivers are the raw materials (especially 2-ethylhexyl chloroformate) and the energy-intensive safety measures required for its production and handling

Decomposition kinetics are more sensitive to temperature​ than pressure. However, in closed systems, pressure can influence the boiling point and thus the decomposition rate

Common alternatives include other peroxydicarbonates (e.g., diethyl peroxydicarbonate) and peroxyesters (e.g., tert-butyl peroxyneodecanoate), chosen based on required decomposition temperature

DEHPD is unstable in both strongly acidic and basic conditions, which catalyze its decomposition. It is best handled in neutral environments​

Its balanced decomposition profile​ allows for precise control over polymerization rates and polymer properties, making it a strategic choice for producing consistent, high-quality PVC and other resins