Update date: Jul 08, 2026 | 272 Pages | Report ID: SFC-005949
Semiconductor Advanced Wet Clean Chemistry Market
DMA IntelligenceSemiconductor Advanced Wet Clean Chemistry Demand Analysis & Forecast Outlook 2033
Segments: Product Type (Acidic Cleaners, Alkaline Cleaners, Solvent-based Cleaners, Others), Application (Wafer Cleaning, Mask Cleaning, Equipment Cleaning, Others), End-User (Integrated Device Manufacturers, Foundries, Others), By Region, And Segment Forecasts
$3.9B
Market Size, 2025
$4.1B
Market Estimate, 2026
$6.8B
Market Forecast, 2033
7.4%
CAGR, 2026–2033
Semiconductor Advanced Wet Clean Chemistry Market Size, Share & Key Insights
The Semiconductor Advanced Wet Clean Chemistry Market size was valued at USD 3.85 Billion in 2025, and the market is projected to grow from USD 4.13 Billion in 2026 to USD 6.82 Billion by 2033, growing at a CAGR of 7.4% during the forecast period 2026–2033. The market saw distributed global demand in 2025.
Study Overview
 Study Period | 2021 - 2033 |
 Base Year | 2025 |
 Estimated Year | 2026 |
 Forecast Period | 2026-2033 |
 Historical Range | 2021-2025 |
| Units | USD Billion |
 Coverage | Global | North America, Europe, Asia-Pacific, Latin America, Middle East & Africa |
 Deliverables | PDF + Excel Data Pack |
Major Market Players
Key Takeaways: Semiconductor Advanced Wet Clean Chemistry Market
- In 2025, the global Semiconductor Advanced Wet Clean Chemistry market size was estimated to be USD 3.85 billion.
- Projected to grow at a 7.4% CAGR, reaching a valuation of USD 6.80 billion by 2033.
- The Aqueous Cleaners category accounted for the highest market share of approximately 40% within the Product Type segment.
- Solvent Cleaners captured a substantial 30% of the total revenue in 2025, reflecting their importance in specific cleaning applications.
- Regionally, Asia-Pacific emerged as the top market, generating an estimated USD 1.89 billion and securing a 49% share in 2025.
- Primary market growth drivers include the increasing demand for advanced semiconductor devices, miniaturization trends, and the expansion of new fabrication facilities globally.
- Key industry player Entegris strengthened its market position via continuous innovation in high-purity cleaning solutions and strategic collaborations with leading foundries.
Market Definiton and Strategic Context
The Semiconductor Advanced Wet Clean Chemistry Market refers to the specialized chemicals and processes used in the semiconductor manufacturing industry for cleaning and surface preparation of silicon wafers and other substrates. This critical step ensures the removal of contaminants, particles, and residues without damaging delicate device structures, thereby enhancing yield and device performance. The market encompasses a range of solutions including aqueous cleaners, solvent cleaners, etching solutions, and strippers, each formulated for specific cleaning tasks in various stages of wafer fabrication. The demand for these high-purity chemicals is directly linked to the increasing complexity of semiconductor devices, the shrinking node sizes, and the stringent cleanliness requirements for advanced manufacturing processes. The Semiconductor Advanced Wet Clean Chemistry market size is driven by continuous innovation in material science and process technology to meet evolving industry standards. The growth outlook for this sector remains robust, fueled by global digitalization trends and the expansion of end-use applications like AI, IoT, and 5G. The market forecast indicates sustained industry expansion as chip manufacturers invest heavily in new fabrication facilities and advanced packaging technologies. The market's current valuation, estimated at USD 3.85 billion in 2025, reflects its indispensable role in the entire semiconductor value chain. Understanding this market is crucial for stakeholders aiming to capitalize on the ongoing technological advancements in microelectronics.
| Report Attribute | Details |
|---|---|
| Market size value in 2025 | USD 3.85 Billion |
| Revenue forecast in 2033 | USD 6.82 Billion |
| Growth rate | CAGR of 7.4% from 2025 to 2033 |
| Actual data | 2021 - 2024 |
| Forecast period | 2025 - 2033 |
| Quantitative units | Revenue in USD Billion and CAGR from 2025 to 2033 |
| Report coverage | Revenue forecast, company share, competitive landscape, growth factors, and trends |
| Segments covered | Product Type, Application, End-User |
| Regional scope | North America; Europe; APAC; Latin America; MEA |
| Country scope | All; All; All; All; All |
| Key companies profiled | Entegris; Merck KGaA; BASF SE; Kanto Chemical Co., Inc.; Avantor, Inc.; Honeywell International Inc.; Fujifilm Holdings Corporation; Mitsubishi Chemical Corporation; Solvay S.A.; Dupont de Nemours, Inc.; Sumitomo Chemical Co., Ltd.; Technic Inc.; Versum Materials (acquired by Merck); JSR Corporation; Tokyo Ohka Kogyo Co., Ltd.; Linde plc; Stella Chemifa Corporation; OCI Company Ltd.; Cabot Microelectronics (CMC Materials); Nagase & Co., Ltd. |
| Customization scope | Free report customization (equivalent to 8 analysts working days) with purchase. Addition or alteration to country, regional & segment scope. |
| Pricing and purchase options | Avail customized purchase options to meet your exact research needs. Explore purchase options |
Growth Catalysts & Market Constraints
The Semiconductor Advanced Wet Clean Chemistry market is experiencing dynamic shifts influenced by technological advancements and evolving industry demands. The market's growth forecast is significantly shaped by the relentless pursuit of smaller node sizes and higher chip densities, which necessitate increasingly sophisticated cleaning protocols. This drive for miniaturization and performance enhancement continues to fuel the Semiconductor Advanced Wet Clean Chemistry market size. Concurrently, geopolitical shifts and supply chain resilience initiatives are impacting regional manufacturing footprints, leading to strategic investments in new fabrication plants. These factors collectively define the current market trajectory, highlighting both lucrative opportunities and considerable challenges for industry participants aiming to sustain growth and innovation in this critical segment of semiconductor manufacturing.
Growth Drivers
- The escalating demand for advanced semiconductor devices across various end-use industries, including artificial intelligence, 5G, automotive electronics, and IoT, is a primary driver. As these applications require higher performance, lower power consumption, and increased integration, the complexity of chip manufacturing rises, necessitating ultra-pure and highly effective wet cleaning chemicals to maintain yield and device reliability. This continuous technological push directly correlates with increased consumption of advanced wet clean chemistry. Manufacturers are investing heavily in R&D to develop next-generation materials and processes to meet these stringent requirements, ensuring market expansion.
- Miniaturization and the transition to smaller process nodes (e.g., 5nm, 3nm) in semiconductor fabrication require increasingly precise and damage-free cleaning processes. Conventional cleaning methods often prove insufficient or damaging at these scales, driving the adoption of advanced wet clean chemistry solutions that offer superior particle removal efficiency, lower defect rates, and material compatibility. This technological imperative forces chipmakers to continually upgrade their cleaning chemical portfolios, fostering innovation and market growth for specialized formulations designed for sub-nanometer geometries. The need to reduce defects and improve yield at these advanced nodes is paramount.
Restraints
- The high cost associated with advanced wet clean chemistry materials and their complex manufacturing processes acts as a significant restraint. These chemicals often require ultra-high purity and specific formulations, leading to higher production costs. Furthermore, the need for specialized handling, storage, and disposal due to their hazardous nature adds to the operational expenses for semiconductor manufacturers. This economic burden can deter smaller players or those in cost-sensitive segments from adopting the most advanced solutions, potentially slowing market penetration in certain areas.
- Environmental and regulatory compliance challenges pose another constraint on the market. Many wet clean chemicals are hazardous and their use, storage, and disposal are subject to strict environmental regulations globally. Meeting these evolving compliance standards requires significant investment in infrastructure, process optimization, and waste treatment technologies, which can increase operational costs and complexity for chemical suppliers and chip manufacturers alike. The continuous need for safer, greener alternatives also presents R&D challenges and delays.
Opportunities
- The development of novel, environmentally friendly, and sustainable cleaning chemistries presents a significant opportunity. With increasing environmental scrutiny and regulations, there is a growing demand for 'green' chemicals that offer comparable or superior cleaning performance with reduced environmental impact and enhanced worker safety. Companies investing in research and development of biodegradable, recyclable, or less toxic formulations can gain a competitive edge and tap into new market segments, aligning with global sustainability goals and attracting environmentally conscious customers.
- Expansion into emerging markets and collaboration with local foundries offers substantial growth avenues. As semiconductor manufacturing capacity expands globally, particularly in regions like Southeast Asia and India, there is a rising need for advanced wet clean chemistry solutions. Strategic partnerships with new and expanding fabrication plants in these regions can facilitate market entry, customize offerings to local requirements, and establish a strong foothold in rapidly developing semiconductor ecosystems, leveraging the growth of regional tech hubs.
Challenges
- The increasing complexity of material stacks and 3D device architectures in advanced semiconductors presents a significant challenge for wet cleaning processes. Developing chemistries that can selectively remove contaminants from intricate structures without damaging sensitive materials (e.g., high-k dielectrics, metal gates) requires highly specific and often unique formulations. This necessitates extensive R&D and collaboration between chemical suppliers and chipmakers to overcome material compatibility issues and ensure effective cleaning without compromising device integrity or performance.
- Supply chain vulnerabilities and raw material sourcing issues pose another challenge for the advanced wet clean chemistry market. The production of high-purity chemicals relies on a complex global supply chain for specialized raw materials, which can be susceptible to geopolitical tensions, trade disputes, and natural disasters. Ensuring a stable and consistent supply of these critical inputs, while maintaining quality and cost-effectiveness, requires robust risk management strategies and diversification of sourcing to mitigate potential disruptions.
Market Level Breakdown
Semiconductor Advanced Wet Clean Chemistry Segmentation Breakdown
- Product Type
- Acidic Cleaners
- Alkaline Cleaners
- Solvent-based Cleaners
- Others
- Application
- Wafer Cleaning
- Mask Cleaning
- Equipment Cleaning
- Others
- End-User
- Integrated Device Manufacturers
- Foundries
- Others
Geographic Performance & Regional Trends
Geographically, the Asia-Pacific region dominates the Semiconductor Advanced Wet Clean Chemistry market, primarily due to the concentration of major semiconductor manufacturing hubs in countries like China, Taiwan, South Korea, and Japan. This region is home to the largest foundries and IDMs, driving significant demand for advanced cleaning solutions as they push the boundaries of chip technology. North America and Europe also hold substantial market shares, driven by strong R&D ecosystems and the presence of leading-edge technology developers. The Asia Pacific region is also projected to be the fastest-growing market, fueled by ongoing investments in new fab construction and government initiatives to bolster domestic semiconductor production, further accelerating Semiconductor Advanced Wet Clean Chemistry market growth and regional forecast.
Regional Growth Drivers
- North America: The region's robust innovation ecosystem and significant investments in advanced research and development for next-generation semiconductor technologies drive the demand for sophisticated wet clean chemistry. Countries like the United States are heavily investing in bringing semiconductor manufacturing back onshore, fostering new fab construction and expansion, which directly translates to increased consumption of high-purity chemicals essential for maintaining stringent quality standards and maximizing production yields.
- Europe: Government support for semiconductor R&D and manufacturing initiatives, coupled with a focus on automotive and industrial electronics, propels market growth. Countries such as Germany, the Netherlands, and France are at the forefront of developing specialized chips for high-reliability applications, demanding advanced cleaning solutions. The emphasis on environmental sustainability also encourages the adoption of greener, more efficient wet clean chemistry, driving innovation within the European market landscape.
- Asia Pacific: This region is the global epicenter of semiconductor manufacturing, with leading foundries and IDMs concentrated in Taiwan, South Korea, Japan, and China. Continuous investments in new fabrication plants, rapid technological advancements, and high-volume production of consumer electronics, AI, and 5G devices are the primary growth catalysts. The region's sheer manufacturing scale and relentless pursuit of smaller node sizes ensure a consistently high demand for advanced wet clean chemistry.
- Latin America: While a smaller market, growth is driven by increasing industrialization and expanding demand for consumer electronics, leading to nascent semiconductor assembly and test operations. Countries like Brazil and Mexico are seeing rising investments in electronics manufacturing, creating a steady, albeit moderate, demand for wet clean chemistry. Opportunities lie in supporting localized electronics production and catering to specific regional industrial needs, as the technology infrastructure continues to mature across the continent.
- Middle East & Africa: The region's market is primarily driven by efforts to diversify economies away from oil, with increasing investments in technology infrastructure and digitalization initiatives. Emerging electronics manufacturing and assembly plants, particularly in countries like Saudi Arabia and the UAE, are slowly contributing to the demand for semiconductor chemicals. Growth is anticipated as these nations build out their tech ecosystems and seek to establish a foothold in the global electronics supply chain, albeit from a lower base.
The regional forecast indicates a sustained shift in manufacturing capabilities, with Asia-Pacific maintaining its dominance and expanding its lead, driven by massive investments and government support. North America and Europe will likely focus on high-value, niche segments and advanced R&D, ensuring a steady, albeit slower, growth trajectory. Emerging regions like Latin America and MEA are expected to witness gradual market penetration, as local electronics manufacturing ecosystems mature. Suppliers in the Semiconductor Advanced Wet Clean Chemistry market must adopt localized strategies, catering to the distinct technological and regulatory landscapes of each region to effectively capture growth opportunities and mitigate risks in a globally competitive environment.
Competitive Insights & Leading Companies
The Semiconductor Advanced Wet Clean Chemistry competitive landscape is characterized by a moderately consolidated structure, with a few large global players holding significant market share alongside several specialized regional vendors. Key global participants often leverage their extensive R&D capabilities, broad product portfolios, and established relationships with leading semiconductor manufacturers. Competitive intensity is high, driven by the continuous need for innovative, high-purity, and cost-effective cleaning solutions to support the rapid technological advancements in chip fabrication. Key competitive levers include consistent product quality, technical support, supply chain reliability, and the ability to customize solutions for specific process nodes and material stacks. Strategic partnerships with chipmakers for co-development of new chemistries are also crucial, ensuring early integration into advanced manufacturing processes. Pricing strategies are intricate, balancing the high cost of R&D and manufacturing with the need to offer competitive solutions. The market also sees regional players focusing on specific chemical types or serving local foundries with tailored offerings, further intensifying the competitive dynamics.
Differentiation in the Semiconductor Advanced Wet Clean Chemistry market is achieved through superior chemical performance (e.g., higher selectivity, lower defect rates), environmental sustainability of products, and robust technical service. Leading companies are actively engaged in mergers and acquisitions to expand their technology portfolios and geographic reach, while also investing heavily in R&D to develop next-generation cleaning solutions compatible with extreme ultraviolet (EUV) lithography and advanced packaging. Product launches often involve chemicals designed for specific applications, such as post-etch residue removal or selective material etching at atomic scales. Strategic collaborations with equipment manufacturers and research institutions are vital for developing integrated solutions. However, challenges such as managing complex global supply chains for ultra-high purity raw materials, intense price pressure from large chip manufacturers, and the high cost of regulatory compliance continue to impact profitability. Companies must balance innovation with operational efficiency to maintain a competitive edge, navigating the delicate balance between performance requirements and economic viability in a rapidly evolving industry.
Semiconductor Advanced Wet Clean Chemistry Key Companies
- Entegris
- Merck KGaA
- BASF SE
- Kanto Chemical Co., Inc.
- Avantor, Inc.
- Honeywell International Inc.
- Fujifilm Holdings Corporation
- Mitsubishi Chemical Corporation
- Solvay S.A.
- Dupont de Nemours, Inc.
- Sumitomo Chemical Co., Ltd.
- Technic Inc.
- Versum Materials (acquired by Merck)
- JSR Corporation
- Tokyo Ohka Kogyo Co., Ltd.
- Linde plc
- Stella Chemifa Corporation
- OCI Company Ltd.
- Cabot Microelectronics (CMC Materials)
- Nagase & Co., Ltd.
Semiconductor Advanced Wet Clean Chemistry Market Ecosystem
Ecosystem Participants
- Raw Material Suppliers — provide essential high-purity chemical precursors and solvents. These suppliers are critical for the quality and consistency of the final wet clean chemistry products. Their role involves rigorous quality control and often specialized synthesis to meet the stringent purity requirements of the semiconductor industry, ensuring that no contaminants are introduced during the cleaning process and that the chemical formulations perform as expected without causing defects.
- Chemical Manufacturers/Formulators — develop, produce, and supply the actual advanced wet clean chemistry solutions. These companies invest heavily in R&D to create proprietary formulations, optimize cleaning performance, and ensure compatibility with evolving semiconductor materials and processes. They often work closely with chip manufacturers to tailor solutions for specific cleaning challenges, offering a wide range of products including aqueous cleaners, organic solvents, and etching solutions, all designed for precision cleaning and surface preparation.
- Semiconductor Foundries/IDMs (Integrated Device Manufacturers) — the primary end-users of advanced wet clean chemistry. These entities utilize the chemicals in various stages of wafer fabrication, from pre-diffusion cleaning to post-etch residue removal, to ensure high device yield and performance. Their extensive manufacturing scale and continuous drive for smaller node sizes dictate the demand and specifications for these cleaning solutions. They also provide crucial feedback for chemical suppliers to refine and innovate their product offerings, forming a tight symbiotic relationship within the ecosystem.
- Equipment Manufacturers — design and supply the wet processing tools and chambers where cleaning chemistries are applied. Their equipment must be compatible with the advanced chemicals and capable of precise control over temperature, flow, and chemical concentration. Collaboration between chemical and equipment manufacturers is vital to ensure optimal process integration and performance, as the effectiveness of the cleaning solution is highly dependent on the application method. This synergy helps in developing comprehensive cleaning solutions for chipmakers.
- Research and Development Institutions — academic and private research organizations that contribute to fundamental science and new chemical discoveries. They explore novel cleaning mechanisms, develop advanced analytical techniques, and investigate alternative, more sustainable chemistries. Their work often forms the basis for future product innovations by chemical manufacturers, pushing the boundaries of what is possible in semiconductor cleaning and addressing emerging challenges in material science. They are key to long-term technological advancement.
- Waste Management and Recycling Services — handle the safe disposal and, where possible, recycling of spent wet clean chemicals. Given the hazardous nature of many of these materials, specialized services are required to comply with environmental regulations and minimize ecological impact. These services ensure responsible end-of-life management for chemicals, closing the loop on the supply chain and contributing to the overall sustainability efforts of the semiconductor industry. This is an increasingly important part of the ecosystem.
- Regulatory Bodies and Industry Associations — set standards for chemical safety, environmental protection, and manufacturing processes. They influence product development and market entry by establishing guidelines for chemical purity, handling, and waste disposal. Industry associations also facilitate collaboration, knowledge sharing, and advocacy for the semiconductor ecosystem, promoting best practices and addressing common challenges. Their oversight ensures compliance and fosters a responsible operating environment for all participants.
Report Coverage & Key Deliverables
The report delivers a comprehensive analysis of the Semiconductor Advanced Wet Clean Chemistry, combining quantitative data with qualitative insights. This study provides an in-depth examination of market dynamics, trends, and future growth opportunities, offering a strategic roadmap for stakeholders. It is meticulously designed to equip business users, investors, and industry professionals with actionable intelligence needed to make informed decisions. The report covers historical market performance, current market sizing, and an eight-year forward-looking forecast, segmented by product type, application, and end-user, across key global regions. Emphasis is placed on identifying key growth drivers, challenges, and competitive strategies adopted by leading market players. This holistic approach ensures a clear understanding of the market landscape, facilitating strategic planning and investment decisions within the dynamic semiconductor industry. The detailed data and expert analysis provide a reliable foundation for navigating market complexities and capitalizing on emerging trends.
Report Coverage
- Market Size Estimates (historical and forecast)
- The report provides market size estimations for the historical period of 2021-2025 and an extensive forecast through 2033. These estimates are derived from a robust methodology combining primary research with industry databases, ensuring accuracy and reliability for strategic planning. The comprehensive coverage allows for trend analysis and projection of future market trajectories, offering a clear view of market evolution over time.
- Detailed Segmentation And Revenue Analysis
- A granular breakdown of the market by product type, application, and end-user is included, offering insights into each segment's contribution to overall revenue. This detailed analysis helps identify high-growth segments and informs targeted marketing and product development strategies. Understanding the monetization lens across various segments is crucial for optimizing resource allocation and maximizing return on investment.
- Regional And Country-Level Insights
- The study offers in-depth analysis across major geographies including North America, Europe, Asia-Pacific, Latin America, and Middle East & Africa, with specific country-level data for key markets. This regional and country-level perspective highlights varying market maturity, regulatory environments, and growth contrasts, enabling companies to tailor their expansion strategies effectively and understand localized market dynamics.
- Competitive Benchmarking Of Key Players
- A thorough assessment of the competitive landscape, including profiles of leading companies, their strategic initiatives, and market positioning. This section provides insights into competitive advantages, M&A activities, product launches, and technological advancements, offering a benchmark for strategic planning and identifying potential partnership opportunities or competitive threats. It aids in understanding market leadership and differentiation.
- Customization Options Based on Specific Requirements
- The report offers flexible customization options to meet specific client needs, allowing for focused analysis on particular regions, segments, or competitive aspects. This ensures that the deliverable is highly relevant and actionable for individual business objectives, providing tailored insights beyond the standard scope. Examples include specific country deep-dives or detailed competitive intelligence on niche players, offering greater scope tailoring and flexibility.
Recent Industry Insights
The Semiconductor Advanced Wet Clean Chemistry industry has witnessed several significant developments over the past 12-18 months, reflecting the sector's rapid evolution and strategic realignments. Ongoing global efforts to strengthen semiconductor supply chains have driven substantial investments in new fabrication facilities, particularly in North America and Asia-Pacific, directly boosting demand for advanced cleaning solutions. Key players have focused on developing environmentally friendlier chemistries and enhancing process efficiency to meet stringent sustainability goals. Partnerships between chemical suppliers and equipment manufacturers have intensified, aiming to deliver integrated cleaning solutions for advanced process nodes. These Semiconductor Advanced Wet Clean Chemistry industry trends underscore a concerted effort towards innovation, sustainability, and resilience in the face of increasing technological complexity and geopolitical dynamics, shaping the future trajectory of the market.
Key Market Developments
- October 2024: Entegris launched a new line of advanced cleaning chemistries optimized for 3nm and 2nm process nodes, addressing critical contamination challenges in next-generation semiconductor manufacturing.
- August 2024: Merck KGaA announced a strategic partnership with a leading Asian foundry to co-develop innovative wet chemical solutions for advanced memory chip production, aiming to enhance yield and reduce material waste.
- June 2024: BASF SE expanded its production capacity for high-purity electronic chemicals in South Korea, responding to the growing demand from the region's burgeoning semiconductor industry.
- March 2024: Dupont de Nemours, Inc. introduced a new portfolio of sustainable cleaning and etching solutions, designed to minimize environmental impact while maintaining high performance for advanced logic devices.
- January 2024: The United States government announced significant funding for semiconductor research and manufacturing, indirectly boosting the domestic market for advanced wet clean chemistry providers.
- November 2023: Kanto Chemical Co., Inc. unveiled a novel post-CMP cleaning solution, specifically engineered to improve surface quality and reduce defects in complex integrated circuits.
Analyst Opinion
The Semiconductor Advanced Wet Clean Chemistry market is positioned for sustained growth, driven by the relentless pace of innovation in semiconductor manufacturing. The market's attractiveness stems from its indispensable role in achieving high yields and device performance, particularly as chip designs become more intricate and process nodes shrink. Competitive intensity is high, with leading global players leveraging their technological prowess and extensive R&D to maintain an edge. The demand-supply balance remains tight for ultra-high purity chemicals, with manufacturers continuously investing in capacity expansion to meet the surging requirements of new fabrication facilities globally. Strategic collaborations between chemical suppliers and chipmakers are becoming increasingly crucial for co-developing customized solutions that address specific cleaning challenges at advanced nodes. The market outlook is overwhelmingly positive, underpinned by the foundational importance of these chemistries to the entire microelectronics industry, ensuring a stable and growing revenue stream for specialized providers.
Looking ahead, the long-term outlook for the Semiconductor Advanced Wet Clean Chemistry market is robust, characterized by continuous innovation aimed at developing more selective, efficient, and environmentally sustainable cleaning processes. Key risk factors include the volatile cost of raw materials, increasing geopolitical tensions impacting global supply chains, and the significant capital expenditure required for R&D and manufacturing capacity. However, these risks are largely mitigated by the critical nature of these chemicals and the high barriers to entry for new players. The industry will likely see further consolidation as companies seek to expand their technological capabilities and market reach. The strategic implications for suppliers involve deep integration with customers, proactive R&D into novel materials, and robust supply chain management to ensure resilience. Success will hinge on the ability to anticipate and adapt to rapid technological shifts in semiconductor manufacturing while adhering to increasingly stringent environmental and safety regulations.