Perodox® TAHP - Tert-Amyl hydroperoxide

TAHP is an organic alkyl hydroperoxide (CAS 3425-61-4) used primarily as a free-radical initiator in polymerization and oxidation reactions. It appears as a colorless to yellowish liquid with a sharp odor

The molecular formula is C₅H₁₂O₂, and the molecular weight is 104.15 g/mol

Synonyms include tert-Pentyl hydroperoxide, 1,1-dimethylpropyl hydroperoxide, Trigonox TAHP, and 2-hydroperoxy-2-methylbutane

The CAS registry number is 3425-61-4

Density: 0.905 g/cm³; melting point: -70°C; flash point: 41°C; water solubility: 63.25 g/L at 20°C

An improved method uses tert-amyl alcohol, hydrogen peroxide, and sulfuric acid at 35°C for 2 hours, increasing yield to 68% (from 38%) with >95% purit

Polymer/resin manufacturing (45% of global use), hair care (20%), pharmaceuticals, agrochemicals, and specialty adhesives

It offers balanced reactivity, non-corrosive decomposition products (tert-amyl alcohol/acetone), and stability at room temperature

It removes sulfur compounds from diesel; optimal conditions (90°C, 2.5 h) achieve 96.8% sulfur removal

It is highly flammable (H226), toxic if swallowed/inhaled (H302/H331), causes skin burns (H314), and harms aquatic life (H411)

Oral LD₅₀ for rats is 863 mg/kg and 450 mg/kg for mice

Store below 30°C in a cool, ventilated area, away from organic materials, reducing agents, and strong acids

Typically 12.29–13.06% for 80–85% pure solutions

The 10-hour half-life temperature is 153°C

TAHP has higher stability and non-acidic decomposition products, reducing equipment corrosion

UN number 3107; HS code 29096000

Pergan GmbH, United Initiators, NOF Corporation, and Chinese suppliers like Do Sender Chem

43.2 hPa

It enables low-temperature bleaching, reducing scalp irritation by 38% in permanent hair color products

80°C, with an alarm temperature of 75°C

It is soluble in alcohols, esters, ethers, and hydrocarbons but slightly soluble in water

It enables high-yield (89%) production of chiral intermediates for cardiovascular drugs

It is toxic to aquatic life with long-lasting effects (R52/53)

Typically 20 kg PE buckets

Approximately 1.5000 (estimate)

It initiates efficient emulsion polymerization, enhancing resin stability and curing speed

Use sand, carbon dioxide, or specialized extinguishers; avoid water, which may spread flames

Short-term exposure limit: 5 mg/m³

It serves as a photoinitiator in UV-cured coatings, achieving full cure in 3.2 seconds at 85°C

GC analysis, IR, ¹H NMR, and ¹³C NMR

12.71 ± 0.50 (predicted)

EU tariffs (6.5%) and India’s 10% duty reshape supply flows toward Southeast Asia

It initiates vinyl chloride polymerization, contributing to >50 million metric tons of global PVC output

It is maintained below 30°C to prevent decomposition; commercial grades include stabilizers

Driven by polymer demand, especially in Asia-Pacific, with CAGR projections of XX% (2024–2030)

TAHP requires no freezing, has longer shelf life, and produces less corrosive by-products

104.084 g/mol

As an oxidant in desulfurization, it reduces sulfur content to 29.7 μg/g

H226, H242, H302, H311, H314, H317, H331, H341, H411

Ultra-pure grades are used in photolithography for microchip fabrication

-10°C

Hydrogen peroxide price surges (18% in Q1 2023) increase TAHP production costs by 12–15%

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It requires safety assessments, adding 15–20% to compliance costs

15.36%

It accelerates pyrethroid production by 22% compared to alternative oxidizers

29.5 Ų

It forms low-dielectric, high-strength resins for electronics

Class 5.2 (organic peroxide)

Its non-acidic decomposition supports green synthesis, reducing wastewater treatment needs