4-Aminophenylacetic acid (CAS# 1197-55-3), also known as p-aminophenylacetic acid or 4-aminobenzeneacetic acid, is an aromatic amino acid derivative with the molecular formula C₈H₉NO₂ and a molecular weight of 151.17 g/mol. Its molecular structure consists of a benzene ring bearing an amino group (-NH₂) at the para position relative to a carboxymethyl group (-CH₂COOH). As a versatile organic building block, 4-aminophenylacetic acid exhibits unique bifunctional reactivity: the aromatic amine enables diazotization, acylation, and Schiff base formation, while the carboxylic acid allows esterification, amidation, and salt formation. This dual functionality makes it an indispensable intermediate in the synthesis of beta-lactam antibiotics (especially cephalosporins), peptide coupling reagents, pharmaceutical impurities, and specialty fine chemicals. The compound typically appears as a white to pale yellow crystalline powder with a melting point of 199–201°C. It is soluble in polar solvents such as alcohols and alkali solutions, and slightly soluble in hot water. Its production typically involves reduction of 4-nitrophenylacetic acid or catalytic hydrogenation, and market demand is closely tied to the global pharmaceutical industry’s need for high-purity intermediates. Based on its chemical characteristics and industrial chain position, this article systematically analyzes international market dynamics of 4-aminophenylacetic acid, focusing on core application scenarios, competitive landscape, regional differences, regulatory trends, and future outlook, providing strategic references for industry participants.
Core Application Fields and Demand
Market demand for 4-aminophenylacetic acid is highly concentrated in three major areas: pharmaceutical intermediates (≈70% of global consumption), peptide synthesis and bioconjugation reagents (≈20%), and specialty fine chemicals including dyes, pigments, and polymer additives (≈10%). Its ability to participate in both electrophilic and nucleophilic reactions drives its widespread use across these diverse sectors.
In the pharmaceutical intermediate sector, 4-aminophenylacetic acid is a key precursor for the synthesis of cephalosporin antibiotics, particularly cefaclor, cefprozil, and other second- and third-generation cephalosporins. The compound’s amino group couples with activated side chain acids, while its carboxylic acid forms amide bonds with the cephalosporin core. With the global antibiotic market exceeding $40 billion annually and the rise of multi-drug-resistant infections driving demand for newer cephalosporins, consumption of high-purity 4-aminophenylacetic acid remains robust. Additionally, it is used in the synthesis of active pharmaceutical ingredients (APIs) for nonsteroidal anti-inflammatory drugs (NSAIDs), such as fenamic acid derivatives, and other bioactive molecules. The compound has also been submitted to the National Cancer Institute (NCI) for testing and evaluation as a potential anticancer agent.
In peptide synthesis and bioconjugation, 4-aminophenylacetic acid serves as a linker or spacer in the preparation of peptide-drug conjugates (PDCs) and antibody-drug conjugates (ADCs). Its rigid aromatic structure provides stability and predictable reactivity. The growing field of targeted therapeutics, including ADC development by major biopharma companies, has increased demand for ultra-high-purity (≥99.5%) grades of this compound. Researchers commonly employ this compound in synthetic protocols for developing novel bioactive molecules and exploring protein modification strategies. It is also used as a scaffold for molecular linking, expansion, and modification in drug discovery and drug synthesis.
In fine chemicals, 4-aminophenylacetic acid is used to synthesize azo dyes, fluorescent whitening agents, and corrosion inhibitors. Its chemical properties contribute to the color-forming ability of dyes and pigments. It also finds application as an intermediate for polymer stabilizers and UV absorbers. This segment grows at 3-5% annually, driven by industrial coating and textile demands. Additionally, the compound is used in the development of plant growth regulators and electrochemical sensors, including molecularly imprinted sensors for glyphosate detection.
Major Market Participants
The global supply system for 4-aminophenylacetic acid (CAS: 1197-55-3) features a pattern of “specialized fine chemical companies and Chinese manufacturers dominating large-scale production, with European and Japanese players focusing on ultra-high-purity and GMP grades”. Production relies on catalytic hydrogenation of 4-nitrophenylacetic acid or multi-step synthesis from phenylacetic acid.
In the global high-purity pharmaceutical segment, established players include: Bachem (Switzerland) offers GMP-grade 4-aminophenylacetic acid for peptide synthesis and ADC applications, with purity ≥99.5% and full regulatory documentation. Other international suppliers such as Sigma-Aldrich and TCI Chemicals provide research-grade material with purity ≥98%.
In the industrial and large-scale production segment, Chinese manufacturers have emerged as the dominant force. China is the world’s largest producer and consumer of 4-aminophenylacetic acid, with annual production capacity estimated at over 2,000 tons. Numerous Chinese chemical companies operate production facilities, leveraging cost advantages, established supply chains, and integrated manufacturing capabilities to supply both domestic and international markets.
European and Japanese manufacturers focus on ultra-high-purity and GMP-compliant grades for pharmaceutical applications, while Chinese producers serve the broader industrial and intermediate markets with competitive pricing and large-scale capacity.
Regional Market Dynamics
The global 4-aminophenylacetic acid market exhibits distinct regional characteristics, with production concentrated in Asia-Pacific (particularly China) and consumption distributed across North America, Europe, and emerging markets.
The Asia-Pacific region is the dominant force in the global 4-aminophenylacetic acid market, accounting for the largest share of both production and consumption. China serves as the world’s manufacturing hub, with extensive production capacities and integrated supply chains. The rapid growth of the pharmaceutical industry in China, India, and Southeast Asia continues to drive regional demand. India has emerged as an important consumer market, with its growing generic pharmaceutical sector driving demand for high-quality intermediates.
North America remains a key market for high-purity and GMP-grade 4-aminophenylacetic acid, driven by demand from the pharmaceutical and biotechnology sectors. The United States hosts major pharmaceutical companies and contract research organizations that require high-quality intermediates for drug development and manufacturing. The ADC market, projected to exceed $30 billion by 2030, is a significant growth driver for ultra-high-purity grades of this compound.
Europe is characterized by stringent regulatory requirements and a strong focus on quality and sustainability. The region’s pharmaceutical industry demands GMP-compliant intermediates with full documentation. European manufacturers such as Bachem cater to this high-end segment, while imports from Asia supply the broader industrial market.
Latin America and other regions represent growing markets, with demand driven by expanding pharmaceutical manufacturing and industrial development.
Regulatory and Environmental Considerations
As a pharmaceutical intermediate and fine chemical, 4-aminophenylacetic acid (CAS# 1197-55-3) is subject to regulatory oversight in major global economies. Compliance with relevant regulations is essential for market access and trade.
For pharmaceutical applications, 4-aminophenylacetic acid used in API synthesis must comply with pharmacopoeia standards and GMP requirements. Manufacturers supplying to regulated markets must provide comprehensive documentation, including Certificates of Analysis (COA), impurity profiles, and stability data. The compound is classified under Harmonized Tariff Code 2922.49.3700 for customs purposes.
For laboratory and research use, the compound is available at ≥98% purity (HPLC) and serves as a versatile intermediate in peptide synthesis, peptidomimetic design, and functional material fabrication. Safety data sheets (SDS) are required for handling and storage.
For industrial applications, manufacturers must comply with local environmental and safety regulations regarding production, waste treatment, and emissions. The catalytic hydrogenation process used in production requires careful management of hydrogen handling and catalyst recovery.
Environmental considerations are increasingly important in the production of 4-aminophenylacetic acid. The industry is witnessing growing interest in greener production methods, including more efficient catalytic hydrogenation processes and waste reduction strategies. Regulatory pressure on chemical manufacturing is expected to intensify, driving investment in cleaner technologies.
Future Outlook
The market outlook for 4-aminophenylacetic acid is positive, supported by several key growth drivers across its major application segments. The global market is expected to maintain steady growth over the next decade, driven by pharmaceutical industry expansion and increasing demand for specialty chemicals.
Key growth drivers include:
- Expansion of the pharmaceutical industry: The global antibiotic market exceeds $40 billion annually, and the rise of multi-drug-resistant infections continues to drive demand for newer cephalosporins, sustaining consumption of high-purity 4-aminophenylacetic acid.
- Growth in targeted therapeutics: The ADC market is projected to exceed $30 billion by 2030, increasing demand for ultra-high-purity grades of 4-aminophenylacetic acid as linkers and spacers in PDCs and ADCs.
- Increasing demand for fine chemicals: The use of 4-aminophenylacetic acid in azo dyes, fluorescent whitening agents, corrosion inhibitors, and polymer additives supports steady growth in the fine chemicals segment.
- Pharmaceutical R&D expansion: The compound’s role as a scaffold for molecular linking and modification in drug discovery ensures continued demand from research institutions and pharmaceutical companies.
Challenges and considerations:
- Raw material price volatility: Fluctuations in the prices of starting materials such as 4-nitrophenylacetic acid and phenylacetic acid may impact production costs.
- Regulatory compliance: Increasingly stringent pharmaceutical and environmental regulations may raise production costs and require ongoing investment in quality systems.
- Competition from alternatives: The market faces competition from other intermediates and synthetic routes that may offer cost or performance advantages in specific applications.
To succeed in this evolving market landscape, suppliers must focus on product quality, supply chain reliability, regulatory compliance, and the development of sustainable production methods. Companies that can offer high-purity products, flexible packaging options, and responsive technical support will be well-positioned to capture growing demand.
Shanghai XinChem Co., Ltd. (XinChem)
As a world-leading supplier of organic chemicals, Shanghai XinChem Co., Ltd. (XinChem) is dedicated to meeting the innovative needs of the pharmaceutical, biotechnology, and specialty chemical industries. Leveraging extensive experience and advanced manufacturing capabilities, XinChem provides high-quality 4-Aminophenylacetic Acid (CAS# 1197-55-3) 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 businesses seeking this versatile pharmaceutical intermediate.
1. Technical Advantages
Advanced Manufacturing and Purification Processes
XinChem utilizes state-of-the-art manufacturing facilities and rigorous quality control measures to ensure the purity, consistency, and safety of its 4-aminophenylacetic acid products. The production process incorporates catalytic hydrogenation technology and advanced purification methods, enabling the delivery of products with purity ≥98% and ≥99% (HPLC) to meet diverse application requirements. Strict process control minimizes impurities and ensures batch-to-batch consistency, providing customers with reliable performance in their formulations.
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, and impurity profiles. This commitment to quality ensures that XinChem’s 4-aminophenylacetic acid meets the stringent requirements of pharmaceutical, research, and industrial applications.
2. Product Advantages
High Purity and Consistent Quality
XinChem offers 4-aminophenylacetic acid in multiple purity grades, including ≥98% and ≥99% (HPLC), ensuring optimal performance in synthesis, formulation, and analytical applications. The product’s high purity minimizes the risk of unwanted side reactions and impurities, making it suitable for demanding applications in pharmaceuticals and peptide synthesis.
Comprehensive Specifications
The product is characterized by a white to pale yellow crystalline appearance, a melting point of 199–201°C, and compliance with industry standards. Careful control of key parameters ensures reliable and reproducible results in customer processes.
Flexible Packaging Solutions
XinChem provides a range of packaging options to accommodate diverse customer needs, from laboratory-scale quantities to industrial-scale drums and bulk shipments. Customized packaging solutions are available upon request, ensuring safe handling, storage, and transportation.
3. Application Fields
As a versatile aromatic amino acid derivative, 4-Aminophenylacetic Acid (CAS# 1197-55-3) exhibits wide application value across multiple industries:
Pharmaceutical Industry:
- Key precursor for cephalosporin antibiotics (cefaclor, cefprozil, and other second- and third-generation cephalosporins)
- Intermediate for APIs in anti-inflammatory drugs and other bioactive molecules
- Building block for pharmaceutical impurities and reference standards
- Scaffold for molecular linking and modification in drug discovery
Peptide Synthesis and Bioconjugation:
- Linker or spacer in peptide-drug conjugates (PDCs) and antibody-drug conjugates (ADCs)
- Reagent for peptide synthesis and peptidomimetic design
- Tool for protein modification strategies and studying enzyme-substrate specificity
Fine Chemicals:
- Intermediate for azo dyes and specialty colorants
- Component in fluorescent whitening agents and corrosion inhibitors
- Intermediate for polymer stabilizers and UV absorbers
- Precursor for plant growth regulators
Research Applications:
- Fragment molecule for drug candidate design and screening
- Building block for novel bioactive molecules
- Material for electrochemical sensor development
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 synthesis parameters, guidance on handling and storage, or assistance with regulatory documentation, XinChem’s technical experts are ready to help.
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.
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, helping customers navigate the complexities of global trade.
5. Reasons to Choose XinChem
- Professionalism: Extensive experience and deep expertise in the chemical industry.
- Quality: Rigorous quality control and adherence to international standards.
- Reliability: Stable supply, competitive pricing, and timely delivery.
- Flexibility: Customized solutions to meet diverse customer needs.
- Service: Responsive technical support and comprehensive documentation.
Contact us today to start your partnership with XinChem!
Website: www.xinchem.com
Email: sales1@xinchem.com
WhatsApp: +86 18049800532
Post time: Aug-21-2026