Perodox® D - 2,2-Di(tert-butylperoxy) butane

The CAS Registry Number for 2,2-Di(tert-butylperoxy)butane is 2167-23-9

The molecular formula is C₁₂H₂₆O₄

The molecular weight is 234.33 g/mol

The molecule features a butane chain where the second carbon atom is bonded to two tert-butylperoxy groups (-OO-C(CH₃)₃).

2,2-Di(tert-butylperoxy)butane is the systematic IUPAC name.

It is typically supplied as a clear, colorless to pale yellow liquid, often as a solution (e.g., 50%) in a mineral oil or other suitable solvent for safety reasons

Common commercial names include Perodox D, Trigonox D, Lupersol 220, Perhexa 22, and Chaloxyd P 1200AL

Yes, DTBPB is a common acronym for 2,2-Di(tert-butylperoxy)butane.

Its primary use is as a free-radical initiator for the polymerization of monomers like ethylene, styrene, and vinyl chloride, and as a crosslinking agent for polymers and elastomers

It is used to crosslink polyethylene and other polymers to enhance their thermal stability and mechanical properties

Yes, it is employed as a curing agent for unsaturated polyester resins and vinyl ester resins in composite materials

Yes, it can serve as a source of tert-butoxyl radicals in various organic transformations

Its specific decomposition temperature and half-life profile make it suitable for a range of polymerization processes, including high-pressure and solution polymerization

The density is approximately 0.88 g/mL at 25°C

The boiling point is approximately 296.66°C

The flash point is about 118°F (48°C)

No, it is immiscible with water

The active oxygen content is approximately 6.83% for the pure compound

The SADT is ≥ 80°C

The half-life is approximately 3 hours at 120°C

The half-life is approximately 30 minutes at 140°C

It is an oxidizing agent, may cause fire or explosion, is harmful if swallowed, and causes serious eye irritation

Recommended PPE includes chemical safety goggles, impermeable gloves, and protective clothing to avoid skin and eye contact

Yes, it is flammable and may cause fire

Immediately wash skin with plenty of soap and water. Remove contaminated clothing. Seek medical attention if irritation occurs

Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing and seek immediate medical attention

Move the person to fresh air. If breathing is difficult, administer oxygen. If not breathing, give artificial respiration and seek medical attention immediately

Yes, it should be handled in a well-ventilated area, and local exhaust ventilation is recommended to maintain concentrations below exposure limits

Store in a tightly closed original container in a refrigerator (approx. 4°C) in a dedicated flammables area, away from heat and incompatible materials

Incompatible materials include strong acids, strong bases, strong oxidizing agents, strong reducing agents, powdered metals, and combustible materials

The shelf life depends on storage conditions but can be several months to a year when stored correctly at recommended temperatures. Always consult the supplier's SDS.

It can decompose if heated, contaminated, or subjected to friction or impact, producing flammable and potentially explosive gases

The UN number is UN 3103

It falls under Hazard Class 5.2 (Organic Peroxide)

It is typically assigned to Packing Group II

GHS hazards include: Oxidizing Liquids (Category 2), Specific Target Organ Toxicity (Single Exposure) (Category 3), Eye Irritation (Category 2A), and Flammable Liquids (Category 3)

Compared to dicumyl peroxide, DTBPB generally has a lower decomposition temperature, making it suitable for different processing temperature ranges.

DTBPB is a dialkyl peroxide, which is less sensitive to shock and friction than benzoyl peroxide (a diacyl peroxide) and is often chosen for its specific decomposition kinetics and lower odor.

Key factors include the required processing temperature (based on half-life data), the polymer or monomer system, desired reaction kinetics, and safety profile

Small spills should be absorbed with an inert material like sand. Collect spillage in a suitable container. Dispose of as hazardous organic peroxide waste in accordance with local, state, and federal regulations. Do not allow material to enter sewers or waterways.

It may be toxic to aquatic life. Its hazardous decomposition products (e.g., hydrocarbons, acetone) can also pose environmental risks.

A decrease in activity typically indicates decomposition, which can be caused by improper storage (e.g., exposure to high temperatures), contamination, or exceeding the shelf life.

Contamination with incompatible substances (like acids, bases, or metals) can catalyze decomposition, leading to a rapid increase in temperature and pressure, potentially resulting in fire or explosion

Compatibility must be thoroughly tested before mixing with any other chemicals. Incompatible additives can lead to dangerous decomposition.

The concentration can be determined by iodometric titration or other analytical methods specified in the supplier's certificate of analysis.

From Do Sender Chem

You should receive the product along with a Safety Data Sheet (SDS) and a Certificate of Analysis (CoA).

Yes, but it is subject to strict national and international regulations for the transport of dangerous goods (hazard class 5.2). Specialized carriers are required

Upon heating, the oxygen-oxygen bond homolytically cleaves, generating two tert-butoxyl radicals, which subsequently initiate polymerization or abstract hydrogen atoms.

Generally, a higher initiator concentration increases the polymerization rate but can lead to a lower average molecular weight of the polymer.

Yes, the decomposition follows first-order kinetics, allowing the half-life at different temperatures to be used for accurate process design and scale-up

The main decomposition products are tert-butanol, acetone, methane, and ethane.