Perodox® 17 - Butyl 4,4-di(tert-butylperoxy) valerate

Butyl 4,4-di(tert-butylperoxy) valerate is an organic peroxide compound used primarily as a free radical initiator and crosslinking agent in polymer chemistry.

The CAS registry number is 995-33-5.

The molecular formula is C17H34O6.

The molecular weight is 334.45 g/mol.

Common trade names include Trigonox 17, Perhexa V 40, Luperox 230XL, and VAROX 230-XL.

It typically appears as a colorless to straw-colored liquid.

It has a slight camphor-like odor.

The predicted boiling point is 363.9±37.0 °C.

The density is 0.9669 g/cm³ at 20°C.

It has very low water solubility of 2.16 mg/L at 20.2°C.

The vapor pressure is 0.053 Pa at 25°C.

The flash point is 151.9°C.

The refractive index is 1.4336 at 20°C.

It should be stored in a cool, dry, well-ventilated area away from heat sources and incompatible materials, preferably below 38°C.

It is classified as an organic peroxide that may cause fire through heating and is sensitive to shock, friction, and contamination.

The UN number is 3103 (or UN 2140/2141 for specific formulations).

It belongs to hazard class 5.2 (Organic Peroxide).

It is assigned to packing group II.

It is primarily used as a free radical initiator in polymerization reactions and as a crosslinking agent for polymers and rubbers.

Yes, it is an effective vulcanizing agent for various rubber compounds.

It is suitable for crosslinking polyethylene, ethylene-propylene rubbers, and other thermoplastics.

It requires temperature-controlled storage and is unstable above 38°C.

Use appropriate personal protective equipment, avoid heat, sparks, and friction, and work in well-ventilated areas.

Avoid contact with strong reducing agents, acids, bases, heavy metals, and accelerators.

Decomposition may produce tert-butanol, acetone, carbon monoxide, and carbon dioxide.

Consult specific regulations and suitability data for food-contact applications.

The active oxygen content varies by formulation but is typically around 9-10% for pure material.

It is often supplied as a liquid or as a stabilized formulation mixed with inert materials.

Half-life data varies with temperature; consult specific technical data for decomposition kinetics.

Yes, it can be used in various polymerization systems including emulsion polymerization with proper formulation.

Typical concentrations range from 0.5% to 3% depending on the polymer and desired crosslink density.

It offers a balance of reactivity and stability suitable for many high-temperature processing applications.

Use chemical-resistant gloves, safety goggles, protective clothing, and work in a fume hood when appropriate.

Shelf life depends on storage conditions but is typically several months when stored properly below 30°C.

Distillation is not recommended due to the risk of decomposition at elevated temperatures.

Specific autoignition temperature data is not readily available, but it may autoignite when decomposed.

Evacuate area, contain spill with inert material, keep substance wet with water, and contact specialists for cleanup.

Use water spray, fog, or foam; avoid direct water streams which may spread the fire; cool containers with water.

The EC number is 213-626-6.

It has a pentanoic acid backbone with butyl ester at one end and two tert-butylperoxy groups at the 4-position.

Suitability depends on specific regulatory requirements and extraction characteristics of the final product.

Immediately flush eyes with plenty of water for at least 15 minutes and seek medical attention.

Wash thoroughly with soap and water; remove contaminated clothing and wash before reuse.

Move to fresh air; if breathing is difficult, give oxygen; seek medical attention.

Do not induce vomiting; seek immediate medical attention.

It is classified under GHS, ADR, IMDG, and other transportation regulations for organic peroxides.

It is soluble in chlorinated solvents, esters, and other common organic solvents.

It is primarily a thermal initiator and not typically used in UV-curing systems.

The self-accelerating decomposition temperature (SADT) is typically around 40-50°C.

Dilute solutions (<70%) are generally safer, but the pure compound requires careful handling due to explosion risk.

The heat of decomposition is significant and can lead to thermal runaway if not properly controlled.

Yes, it can be used as an initiator for styrene polymerization.

The oxygen balance is negative, but specific values should be calculated based on the decomposition reaction.

Empty containers may contain product residues and should be handled with the same precautions as full containers.

Vapor density data is not readily available, but vapors are likely denser than air.

Yes, it can be used in initiating systems with other peroxides or azo compounds for specific effects.

The compound has limited water solubility, but solutions would be expected to be neutral to slightly acidic.

Common analytical methods include HPLC, GC, and iodometric titration for active oxygen content.

The maximum safe handling temperature is generally considered to be 38°C (100°F).

Equipment should be clean, free of contaminants, and compatible with organic peroxides.