The High-Performance Cationic Photoinitiator for UV-LED Curing, 3D Printing, and Semiconductor Photoresists: Bis(4-tert-butylphenyl)iodonium Hexafluorophosphate (CAS# 61358-25-6)

Bis(4-tert-butylphenyl)iodonium hexafluorophosphate (CAS# 61358-25-6), also known as bis(4-tert-butylphenyl)iodonium hexafluorophosphate, bis(p-tert-butylphenyl)iodonium hexafluorophosphate, or SpeedCure 938, is a symmetric diaryliodonium salt with the molecular formula C₂₀H₂₆F₆IP and a molecular weight of 538.29–538.30 g/mol. Its molecular structure consists of a central iodine(III) cation bearing two identical 4-tert-butylphenyl groups, paired with a hexafluorophosphate (PF₆⁻) counteranion. The tert-butyl substituents at the para positions of both aryl rings provide steric bulk and lipophilicity that enhance solubility in cationic polymerizable monomers and improve compatibility with a wide range of formulation components. As a white to almost white powder or crystalline solid with a melting point of 174–175°C (with decomposition), a density of 1.57 g/cm³ at 21°C, and a UV absorption maximum at 240–241 nm, the compound is soluble in ethanol and other polar organic solvents. It is typically supplied at ≥98% purity (HPLC and ion-exchange titration) and should be stored at room temperature in a cool and dark place (recommended <15°C) protected from light. Under GHS, it is classified with the signal word “Warning” (H315, H319) and requires standard laboratory safety precautions during handling.

Bis(4-tert-butylphenyl)iodonium hexafluorophosphate is a high-performance cationic photoinitiator and photoacid generator whose value derives from its unique combination of deep through-cure capability, excellent solubility in epoxy and oxetane monomers, and efficient generation of superacids (HPF₆) under UV irradiation. Upon exposure to UV or LED light, the diaryliodonium cation undergoes heterolytic cleavage to produce a Brønsted superacid that initiates cationic ring-opening polymerization of epoxy and oxetane monomers, while simultaneously generating active radicals through homolytic cleavage that can initiate free-radical polymerization. This dual curing capability enables the formulation of hybrid systems that combine the low shrinkage of cationic polymerization with the rapid cure speed of radical polymerization. The compound is a cornerstone of modern UV-LED curing technology, enabling efficient curing under longer-wavelength LED systems when sensitized with thioxanthones or other photosensitizers. Based on its chemical characteristics and industrial significance, this article systematically analyzes the key properties, core application areas, global market structure, regulatory landscape, and future outlook of this strategically important cationic photoinitiator.

Key Properties and Reactivity Profile

Bis(4-tert-butylphenyl)iodonium hexafluorophosphate (CAS# 61358-25-6) is a symmetric diaryliodonium salt photoinitiator whose value derives from its dual photolysis mechanism and excellent through-cure performance.

Key physicochemical parameters include:

• Molecular Formula: C₂₀H₂₆F₆IP
• Molecular Weight: 538.29–538.30 g/mol
• CAS Number: 61358-25-6
• EINECS Number: 620-341-4
• MDL Number: MFCD06797070
• Synonyms: SpeedCure 938; HRcure-9388; Bis(4-t-butyl phenyl)iodonium hexafluorophosphate; Iodonium bis[4-(1,1-dimethylethyl)phenyl] hexafluorophosphate
• IUPAC Name: bis(4-tert-butylphenyl)iodanium hexafluorophosphate
• Appearance: White to almost white powder or crystalline solid
• Purity: ≥98.0% (HPLC); ≥98.0% (ion-exchange titration); ≥99% available
• Melting Point: 174–175°C (with decomposition)
• Density: 1.57 g/cm³ at 21°C
• UV Absorption Maximum: 240–241 nm
• LogP: 1.38 at 22°C
• Solubility: Soluble in ethanol; good solubility in cationic polymerizable monomers
• Storage: Room temperature, cool and dark place (recommended <15°C), protect from light
• GHS Classification: Warning; H315 (Causes skin irritation), H319 (Causes serious eye irritation)
• Precautionary Statement(s): P264, P280, P302+P352, P332+P313, P337+P313, P362+P364
• Transport Classification: Not classified as hazardous material for DOT/IATA transport under standard conditions
• HS Code: 2931900090

The compound’s reactivity is defined by its dual photolysis mechanism. Upon UV irradiation, the diaryliodonium cation undergoes heterolytic cleavage to generate a superacid (HPF₆), which initiates cationic polymerization of epoxy and oxetane monomers. Simultaneously, homolytic cleavage produces aryl radicals that can initiate free-radical polymerization of acrylate monomers. This dual mechanism enables hybrid curing systems that leverage the complementary advantages of both polymerization modes: the rapid cure speed of radical systems and the low shrinkage, deep through-cure, and dark-cure capability of cationic systems. The PF₆⁻ counteranion is critical—it is non-nucleophilic, ensuring that the generated acid remains active and does not undergo premature termination by counterion attack. The tert-butyl groups enhance solubility in cationic polymerizable monomers and improve compatibility with formulation components, while the UV absorption maximum at 240–241 nm makes the compound well-suited for UV curing applications and for LED curing when sensitized with thioxanthones or other photosensitizers.

Core Application Fields and Demand

Market demand for bis(4-tert-butylphenyl)iodonium hexafluorophosphate (CAS# 61358-25-6) is concentrated in four primary sectors: UV-curable coatings, inks, and adhesives (approximately 35–40% of global consumption), 3D printing and additive manufacturing (approximately 20–25%), semiconductor photoresists and electronic materials (approximately 20–25%), and composites and specialty materials (approximately 10–15%). Its dual radical/cationic curing mechanism, excellent solubility, and efficient photoacid generation serve as the core drivers of sustained demand growth.

In UV-curable coatings, inks, and adhesives, bis(4-tert-butylphenyl)iodonium hexafluorophosphate is a versatile photoinitiator for cationic polymerization of epoxy- and oxetane-based photocurable systems. It is particularly effective in industrial coatings, overprint varnishes, and metal and plastic coatings. The compound’s high reactivity and solubility in cationic systems make it suitable for use at 0.5–5 wt% in UV-curable formulations, providing deep through-cure and excellent adhesion to difficult substrates. In LED-curable formulations, the compound is sensitized with thioxanthones to extend its absorption into the near-UV and visible range, enabling efficient curing under 365–405 nm LED systems. The compound is also used in lamination adhesives and structural adhesives for electronics and automotive applications, where its low shrinkage and excellent adhesion to plastics and metals are paramount.

In 3D printing and additive manufacturing, bis(4-tert-butylphenyl)iodonium hexafluorophosphate is a key photoinitiator for cationic 3D printing resins used in stereolithography (SLA) and digital light processing (DLP). The compound is typically used at concentrations of 1–3% by mass in 3D printing resin formulations. Its low shrinkage and deep through-cure capability are particularly valuable in precision 3D printing applications, where dimensional accuracy and layer-to-layer adhesion are critical. The compound is also employed in direct laser write (DLW) techniques for microfabrication and in two-photon polymerization systems. Recent research has demonstrated excellent photoinitiation capabilities of this compound under blue-light LED@405 nm irradiation in two-component photoinitiating systems, with polymerization performance equal to or better than common commercial Type II photoinitiators.

In semiconductor photoresists and electronic materials, bis(4-tert-butylphenyl)iodonium hexafluorophosphate functions as a photoacid generator (PAG) for UV and deep-UV lithography. Its ability to generate superacids under UV irradiation makes it valuable for chemically amplified resists (CARs) used in semiconductor fabrication. The compound is used in photoresists for printed circuit boards and semiconductor packaging, where its high solubility in PGMEA and γ-butyrolactone enables high-resolution patterning. The compound’s properties allow for high-resolution patterning, which is crucial for the miniaturization of electronic components. It is also employed in electronic encapsulation and potting compounds, where its low shrinkage and excellent dielectric properties contribute to device reliability.

In composites and specialty materials, the compound is used in cationic curing of epoxy composites for aerospace, automotive, and industrial applications. Its deep through-cure capability ensures complete polymerization of thick and filled systems, while its low shrinkage minimizes internal stresses and improves dimensional stability.

Major Market Participants

The global supply system for bis(4-tert-butylphenyl)iodonium hexafluorophosphate (CAS# 61358-25-6) features a pattern of “specialized photoinitiator manufacturers, multinational distribution networks, and Chinese producers serving distinct market segments.” The global market for diaryliodonium salt photoinitiators is part of the broader photoinitiator market, driven by the growing adoption of UV-LED curing technologies and the increasing demand for solvent-free, energy-efficient curing processes. According to market research, the market for bis(4-tert-butylphenyl)iodonium hexafluorophosphate is tracked in comprehensive market research reports covering global and regional markets (Europe, Asia, North America, and Latin America), with forecasts extending through 2029.

In the global high-purity and branded segment, key international suppliers include Arkema Sartomer (SpeedCure 938), offering the compound as a cationic photoinitiator of the iodonium hexafluorophosphate family with an absorption maximum at 241 nm, high reactivity, and solubility in cationic systems. TCI Chemicals offers the compound at >98.0% purity (T)(HPLC) under product code B2380, with specifications including white to almost white powder to crystal appearance, melting point of 175°C (dec.), and solubility in ethanol. Tokyo Chemical Industry (TCI) supplies the compound through its global network. Sigma-Aldrich (Merck) offers the compound at 98% purity under catalog number 726206. Chem-Impex International offers the compound under catalog number 36265. Santa Cruz Biotechnology offers the compound under catalog number sc-396577 (5 g packaging) for chemical synthesis in materials science and micro/nano electronics. AK Scientific (AKSci) offers the compound at 98% purity under product code 1247AP. BOC Sciences offers the compound under catalog number 61358-25-6 as a photoacid generator. Alfa Chemistry offers the compound at 98%+ purity under catalog number PR-RM-61358256. BenchChem offers the compound with comprehensive technical documentation for research applications. These suppliers serve the UV curing, electronics, 3D printing, and specialty chemical industries with products that meet rigorous quality specifications.

In the industrial and large-scale production segment, Chinese manufacturers have emerged as significant players in the global supply chain. XinChem is a reliable manufacturer and supplier of high-purity bis(4-tert-butylphenyl)iodonium hexafluorophosphate from China, offering the compound with purity ≥98% and ≥99% for use in UV-curable coatings, 3D printing resins, and semiconductor photoresists. XinChem provides the compound as a white to almost white powder with comprehensive quality documentation, batch-specific Certificates of Analysis (COA), customizable packaging, and globally compliant REACH, ISO 9001, and GMP-aligned manufacturing. The company emphasizes that the compound is an iodonium salt mainly used as a cationic photoinitiator in UV and LED curing systems, with characteristics including fast curing speed, low odor, and excellent post-cure performance. Other Chinese suppliers include Hubei Xingyan New Material Technology (湖北兴琰新材料科技有限公司), offering the compound at 99% purity in 5 kg, 25 kg, and 200 kg packaging with applications in UV-curable inks, adhesives, coatings, and photoresists. Wuhan Yuqing Jiaheng Pharmaceutical (武汉裕清嘉衡药业有限公司), established in 2009, offers the compound at 99% purity in 25 kg cardboard drums as a pharmaceutical intermediate. Shaanxi Jinghe Pharmaceutical Technology (陕西晶和医药科技有限公司), a high-tech enterprise focused on high-end pharmaceutical intermediates and specialty chemicals, offers the compound with high purity. Shanghai Aladdin Biochemical Technology (阿拉丁) offers the compound at ≥98.0% (HPLC) purity under product code B131530, with packaging sizes of 1 g (¥29.90), 5 g (¥69.90), and 100 g (¥999.90), with storage under light protection, room temperature, and argon atmosphere. Bide Pharmatech (毕得医药) offers the compound at 95% purity under catalog number BD104632 with batch quality inspection reports (NMR, HPLC, GC). Hubei Qianmo Biotechnology (湖北阡陌生物科技有限公司), Zhengzhou Alpha Chemical (郑州阿尔法化工有限公司), Hubei Hongxinruiyu Fine Chemical (湖北鸿鑫瑞宇精细化工有限公司), Hubei Jianchu Biomedical (湖北健楚生物医药有限公司), and Anhuyan (Hainan) Biotechnology (安徽燕安生物科技) are also active suppliers. Chinese suppliers offer the compound at various purity grades (typically 95–99%) and packaging options—from 1 g to 200 kg—serving both domestic and export markets.

Regional Market Dynamics

The global bis(4-tert-butylphenyl)iodonium hexafluorophosphate market exhibits distinct regional characteristics, with production concentrated in Asia-Pacific (particularly China) and consumption distributed across North America, Europe, and the Asia-Pacific region, aligned with the UV curing, electronics, and 3D printing industries in these regions.

The Asia-Pacific region has emerged as a significant production hub for bis(4-tert-butylphenyl)iodonium hexafluorophosphate, with China hosting numerous manufacturers and suppliers including XinChem. The region’s competitive advantages include lower production costs, established chemical infrastructure, and proximity to rapidly growing UV curing, electronics manufacturing, and 3D printing industries. Chinese suppliers offer the compound at various purity grades (typically 95–99%) and packaging options, serving both domestic and export markets. The growing electronics, semiconductor, and additive manufacturing sectors in China, Japan, South Korea, and India continue to drive regional consumption growth. The compound is classified as a photoinitiator and electronic chemical in the Chinese market, with multiple suppliers offering the product in packaging sizes ranging from 1 g to 200 kg.

North America remains a key market for high-purity and research-grade bis(4-tert-butylphenyl)iodonium hexafluorophosphate, driven by demand from the electronics industry, semiconductor manufacturing, and specialty chemical companies. The United States hosts numerous electronics manufacturers, semiconductor fabrication facilities, and UV curing formulators that require high-quality photoinitiators for advanced applications. Sigma-Aldrich, Chem-Impex International, Santa Cruz Biotechnology, and AK Scientific serve the North American market with extensive distribution networks. The region’s well-established regulatory framework and emphasis on product quality support demand for high-grade photoinitiators. Arkema Sartomer’s SpeedCure 938 is available in North America.

Europe is characterized by stringent regulatory requirements, including REACH registration, and a strong focus on quality and sustainability in UV curing and electronics applications. European UV curing formulators, electronics manufacturers, and research institutions demand high-purity photoinitiators with comprehensive documentation. Arkema Sartomer (SpeedCure 938) and TCI Europe serve the European market with in-stock availability. The compound is registered under REACH with EINECS number 620-341-4. The region’s advanced electronics and automotive industries support steady demand for high-performance cationic photoinitiators.

Japan represents a specialized market where bis(4-tert-butylphenyl)iodonium hexafluorophosphate is supplied by Tokyo Chemical Industry (TCI) and other distributors for semiconductor manufacturing, deep-UV photoresist applications, and advanced electronics packaging.

Regulatory and Safety Considerations

As a diaryliodonium salt photoinitiator with applications in UV curing, electronics, and 3D printing, bis(4-tert-butylphenyl)iodonium hexafluorophosphate (CAS# 61358-25-6) is subject to regulatory oversight in major global economies. Compliance with relevant regulations is essential for market access and trade.

GHS classification and handling: Bis(4-tert-butylphenyl)iodonium hexafluorophosphate is classified with the signal word “Warning”. Hazard statements include H315 (Causes skin irritation) and H319 (Causes serious eye irritation). Precautionary statements include P264 (Wash skin thoroughly after handling), P280 (Wear protective gloves/eye protection/face protection), P302+P352 (IF ON SKIN: Wash with plenty of water), P332+P313 (If skin irritation occurs: Get medical advice/attention), P337+P313 (If eye irritation persists: Get medical advice/attention), and P362+P364 (Take off contaminated clothing and wash it before reuse). Some suppliers classify the compound with the signal word “Danger” and additional precautionary statements. The compound should be stored at room temperature in a cool and dark place (recommended <15°C) protected from light. Personal protective equipment including lab gloves, safety glasses, and a lab coat should be worn during handling, and operations should be conducted in a well-ventilated environment.

Storage and stability: Bis(4-tert-butylphenyl)iodonium hexafluorophosphate should be stored at room temperature in a cool and dark place (recommended <15°C) protected from light. The compound is stable under recommended storage conditions but should be kept away from strong oxidizing agents and bases. The compound is light-sensitive and should be protected from direct light exposure.

Regulatory compliance: In the European Union, the compound must comply with REACH registration requirements for import and use. The compound has an EINECS number of 620-341-4 and an MDL number of MFCD06797070. Manufacturers and suppliers must provide comprehensive Safety Data Sheets (SDS) and maintain appropriate documentation. In the United States, bis(4-tert-butylphenyl)iodonium hexafluorophosphate is intended for industrial and research applications and is regulated under TSCA. The compound is not a controlled substance.

Transport information: Bis(4-tert-butylphenyl)iodonium hexafluorophosphate is not classified as hazardous material for DOT/IATA transport purposes under standard conditions. Proper packaging, labeling, and documentation are nevertheless required for international shipping. The compound is typically shipped at ambient temperature with appropriate protection from light and moisture. The HS code for the compound is 2931900090.

Future Outlook

The market outlook for bis(4-tert-butylphenyl)iodonium hexafluorophosphate is positive, supported by several key growth drivers across its major application segments. While the compound remains a relatively specialized cationic photoinitiator, its dual curing mechanism, excellent solubility, and efficient photoacid generation position it for steady growth in the coming years.

Key growth drivers include:

1. Expansion of UV-LED curing technology: The global shift from traditional mercury-based UV lamps to UV-LED curing systems drives demand for photoinitiators with absorption spectra compatible with LED emission wavelengths. The compound’s ability to be sensitized with thioxanthones for efficient curing under 365–405 nm LED systems makes it well-suited for this transition. Recent research has demonstrated excellent photoinitiation capabilities under blue-light LED@405 nm irradiation, with polymerization performance equal to or better than common commercial Type II photoinitiators.
2. Growth in 3D printing and additive manufacturing: The rapidly expanding 3D printing market—particularly stereolithography (SLA) and digital light processing (DLP)—drives demand for cationic photoinitiators that provide low shrinkage, deep through-cure, and excellent dimensional accuracy. The compound is typically used at 1–3% by mass in 3D printing resin formulations.
3. Expansion of semiconductor and photoresist manufacturing: The growing demand for advanced semiconductor devices and MEMS components drives consumption of the compound as a photoacid generator (PAG) in UV and deep-UV photoresists. Its high solubility in PGMEA and γ-butyrolactone enables high-resolution patterning for semiconductor fabrication.
4. Growth in thick and pigmented coating applications: The compound’s deep through-cure capability makes it the preferred photoinitiator for thick, highly pigmented, and filled systems where conventional radical photoinitiators fail. This includes industrial coatings, overprint varnishes, and adhesives for electronics and automotive applications.
5. Increasing demand for low-shrinkage, high-performance materials: The growing emphasis on dimensional stability and mechanical performance in UV-cured materials drives demand for cationic photoinitiators that provide low cure shrinkage and excellent adhesion to various substrates. The compound’s ability to form hybrid systems combining the advantages of both radical and cationic polymerization positions it for growth in high-performance coatings and adhesives.

Challenges and considerations:

• UV absorption profile: The compound’s primary absorption at 240–241 nm requires the use of photosensitizers for efficient curing under longer-wavelength UV-LED systems, which are increasingly dominant in the market.
• Limited scale: As a specialized cationic photoinitiator, the market for this compound is smaller than that of commodity radical photoinitiators.
• Competition from alternative photoinitiators: The market faces competition from other iodonium salts (including the asymmetric 4-isobutylphenyl-4′-methylphenyliodonium hexafluorophosphate, Irgacure 250), sulfonium salts, and radical photoinitiators with different absorption profiles and curing characteristics.
• Light sensitivity: The compound is light-sensitive and should be stored protected from light, which may increase handling and logistics costs.

To succeed in this evolving market landscape, suppliers must focus on product quality (particularly purity and batch-to-batch consistency), supply chain reliability, regulatory compliance, and responsive customer service. Companies that can offer high-purity products, flexible packaging options, and technical support for UV curing, 3D printing, and photoresist applications will be well-positioned to capture growing demand.

Shanghai XinChem Co., Ltd. (XinChem)

As a world-leading supplier of organic chemicals and specialty photoinitiators, Shanghai XinChem Co., Ltd. (XinChem) is dedicated to meeting the innovative needs of the UV curing, electronics, 3D printing, and specialty chemical industries. Leveraging extensive experience and advanced manufacturing capabilities, XinChem provides high-quality Bis(4-tert-butylphenyl)iodonium Hexafluorophosphate (CAS# 61358-25-6) to customers worldwide. As a trusted manufacturer and supplier based in China, XinChem combines competitive pricing, reliable supply, and exceptional service to establish itself as a preferred partner for UV curing formulators, electronics manufacturers, and research institutions seeking this versatile high-performance cationic photoinitiator.

1. Technical Advantages

Advanced Synthesis and Purification Processes
XinChem utilizes state-of-the-art manufacturing facilities and rigorous quality control measures to ensure the purity, consistency, and performance of its bis(4-tert-butylphenyl)iodonium hexafluorophosphate products. The production process incorporates established synthetic routes—including the oxidative coupling of 4-tert-butylbenzene derivatives with iodine(III) reagents followed by counterion exchange with potassium hexafluorophosphate—enabling the delivery of products with purity ≥98.0% (HPLC and ion-exchange titration) and ≥99% to meet diverse application requirements. Strict process control ensures consistent product quality, minimal impurities, and batch-to-batch reproducibility, providing customers with reliable performance in UV-curable coatings, 3D printing resins, and semiconductor photoresists.

Full-Chain Quality Control
The production process strictly adheres to international quality standards, with comprehensive quality control covering raw material sourcing, in-process monitoring, and finished product testing. Each batch is accompanied by a detailed Certificate of Analysis (COA) documenting physical and chemical properties, purity data (HPLC and ion-exchange titration), melting point (174–175°C), density (1.57 g/cm³), UV absorption maximum (240–241 nm), and impurity profiles. XinChem offers batch-specific COA, customizable packaging, and globally compliant REACH, ISO 9001, and GMP-aligned manufacturing.

2. Product Advantages

High Purity and Consistent Quality
XinChem offers bis(4-tert-butylphenyl)iodonium hexafluorophosphate with purity ≥98.0% (HPLC and ion-exchange titration) and ≥99% available, ensuring optimal performance in UV-curable coatings, 3D printing resins, and semiconductor photoresists. The product’s high purity minimizes the risk of unwanted side reactions and variability, making it suitable for demanding applications in electronics manufacturing, precision 3D printing, and high-resolution photolithography. The compound is supplied as a white to almost white powder with consistent appearance and defined melting point specifications (174–175°C with decomposition).

Comprehensive Specifications
Key specifications include:

• Molecular Formula: C₂₀H₂₆F₆IP
• Molecular Weight: 538.29–538.30 g/mol
• CAS Number: 61358-25-6
• EINECS Number: 620-341-4
• Synonyms: SpeedCure 938; HRcure-9388; Bis(4-t-butyl phenyl)iodonium hexafluorophosphate; Iodonium bis[4-(1,1-dimethylethyl)phenyl] hexafluorophosphate
• MDL Number: MFCD06797070
• Appearance: White to almost white powder or crystalline solid
• Purity: ≥98.0% (HPLC) / ≥98.0% (ion-exchange titration) / ≥99% available
• Melting Point: 174–175°C (with decomposition)
• Density: 1.57 g/cm³ at 21°C
• UV Absorption Maximum: 240–241 nm
• LogP: 1.38 at 22°C
• Solubility: Soluble in ethanol; good solubility in cationic polymerizable monomers
• Storage: Room temperature, cool and dark place (recommended <15°C), protect from light
• GHS Classification: Warning; H315, H319
• Transport Classification: Not classified as hazardous material for DOT/IATA transport under standard conditions
• HS Code: 2931900090

Flexible Packaging Solutions
XinChem provides a range of packaging options to accommodate diverse customer needs, from laboratory-scale quantities (1 g, 5 g, 10 g, 25 g) to industrial-scale packaging (50 g, 100 g, 500 g, 1 kg, 5 kg, 25 kg) and bulk shipments. Customized packaging solutions are available upon request, ensuring safe handling, storage, and transportation with appropriate protection from light and moisture.

3. Application Fields

As a versatile high-performance cationic photoinitiator, Bis(4-tert-butylphenyl)iodonium Hexafluorophosphate (CAS# 61358-25-6) exhibits wide application value across multiple industries:

UV-Curable Coatings, Inks, and Adhesives:

• Key photoinitiator for cationic polymerization of epoxy- and oxetane-based systems
• Particularly effective in industrial coatings, overprint varnishes, and metal and plastic coatings
• Used at 0.5–5 wt% in UV-curable formulations
• Deep through-cure and excellent adhesion to difficult substrates
• Sensitized with thioxanthones for LED-curable formulations (365–405 nm)
• Lamination and structural adhesives for electronics and automotive applications

3D Printing and Additive Manufacturing:

• Key photoinitiator for cationic 3D printing resins in stereolithography (SLA) and DLP
• Used at 1–3% by mass in 3D printing resin formulations
• Low shrinkage and deep through-cure for dimensional accuracy
• Suitable for direct laser write (DLW) and two-photon polymerization systems
• Excellent photoinitiation under blue-light LED@405 nm irradiation

Semiconductor Photoresists and Electronic Materials:

• Photoacid generator (PAG) for UV and deep-UV lithography
• Used in chemically amplified resists (CARs) for semiconductor fabrication
• High solubility in PGMEA and γ-butyrolactone for high-resolution patterning
• Photoresists for printed circuit boards and semiconductor packaging
• Electronic encapsulation and potting compounds with excellent dielectric properties

Composites and Specialty Materials:

• Cationic curing of epoxy composites for aerospace, automotive, and industrial applications
• Deep through-cure for thick and filled systems
• Low shrinkage for dimensional stability

4. Service Support

Technical Expertise and Customized Solutions
XinChem’s team of experienced chemists and application engineers provides full technical support throughout the customer journey—from product selection and specification development to application guidance and troubleshooting. Whether customers require optimization of photoinitiator concentration and sensitizer selection for specific UV-LED systems, guidance on hybrid curing formulations, or assistance with regulatory documentation, XinChem’s technical experts are ready to help. Custom synthesis and contract manufacturing with flexible scaling from R&D to commercial quantities are available upon request.

Global Logistics and Reliable Supply
With established supply chains serving markets across Europe, North America, Asia-Pacific, and beyond, XinChem ensures timely delivery and consistent product availability. The company’s logistics team manages all aspects of international shipping, including customs clearance and documentation, with appropriate protection from light and moisture for product stability.

Regulatory Support
XinChem provides comprehensive documentation to support regulatory compliance, including Safety Data Sheets (SDS), Certificates of Analysis (COA), and other required certificates. The company stays current with evolving regulatory requirements in major markets, including REACH, TSCA, and other regional regulations, helping customers navigate the complexities of global trade.

5. Reasons to Choose XinChem

• Professionalism: Extensive experience and deep expertise in photoinitiator synthesis and supply.
• Quality: Rigorous quality control, high purity (≥98.0% to ≥99%), and adherence to international standards.
• Reliability: Stable supply, competitive pricing, and timely delivery.
• Flexibility: Customized solutions to meet diverse customer needs, including custom synthesis and packaging.
• Service: Responsive technical support and comprehensive documentation including batch-specific COA.

Contact us today to start your partnership with XinChem!

Website: www.xinchem.com

Email: sales1@xinchem.com

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