1. Introduction to 4-Nitrophenylacetic Acid

In the highly regulated and precision-driven fields of pharmaceutical manufacturing and fine chemical production, the quality of raw materials dictates the success of the entire synthetic pathway. For process engineers, procurement managers, and production heads, sourcing a reliable, high-purity organic synthesis building block is a critical strategic decision. 4-Nitrophenylacetic Acid (CAS 104-03-0) has emerged as an indispensable compound in modern chemistry.

Also known as p-nitrophenylacetic acid or 4-nitrobenzeneacetic acid, this compound bridges the gap between basic aromatic chemistry and complex, high-value active pharmaceutical ingredients (APIs). Xinchem, a premier provider of custom synthesis and contract manufacturing products, supplies high-purity 4-Nitrophenylacetic Acid to global markets, ensuring that your drug discovery pipelines and chemical formulations proceed without supply chain interruptions.

To secure a stable supply for your production lines, request an RFQ at Xinchem today: https://www.xinchem.com/

2. Chemical Identity and Technical Specifications

Understanding the precise chemical properties of 4-Nitrophenylacetic Acid is essential for safety engineers and formulation scientists. Structurally, it consists of a benzene ring substituted with a nitro group at the para position and an acetic acid moiety. This bifunctional nature allows it to undergo a wide variety of chemical transformations.

• Chemical Name: 4-Nitrophenylacetic Acid
• Synonyms: p-Nitrophenylacetic acid; 4-Nitrobenzeneacetic acid; 2-(4-nitrophenyl)acetic acid
• CAS Number: 104-03-0
• Molecular Formula: C8H7NO4
• Molecular Weight: 181.15 g/mol
• Appearance: Pale yellow to off-white crystalline powder
• Melting Point: 150-154°C

At Xinchem, we guarantee a high-purity profile (typically greater than or equal to 99.0% by HPLC), which is critical when the compound is used as a precursor in sensitive biological or pharmaceutical applications. Impurities can cause unwanted side reactions, reduce overall yield, or introduce toxic byproducts. For authoritative data on chemical properties and safety standards, engineers often refer to databases like PubChem https://pubchem.ncbi.nlm.nih.gov/.

[Image 1 Placeholder: High purity 4-Nitrophenylacetic Acid pale yellow crystalline powder sample in a laboratory setting for organic synthesis.]

3. Pharmaceutical Intermediate: Driving Drug Development

The primary industrial demand for CAS 104-03-0 stems from its role as a highly versatile pharmaceutical intermediate. The presence of both a reducible nitro group and a reactive carboxylic acid group makes it an ideal starting material for synthesizing complex APIs.

3.1 Propranolol Precursor

One of the most significant applications of 4-Nitrophenylacetic Acid is its use in the synthesis of cardiovascular drugs. It serves as a vital propranolol precursor, as well as a building block for other beta-blockers and antihypertensive medications. Through a series of reduction and amidation reactions, the para-nitro group can be converted into an amine, which is then further functionalized to create the active pharmacophore required for interacting with beta-adrenergic receptors. The high purity of Xinchem’s product ensures that these multi-step syntheses proceed with maximum atom economy and minimal waste.

3.2 Penicillin Precursor

In the realm of infectious diseases, p-nitrophenylacetic acid is utilized as a penicillin precursor and a building block for various cephalosporin antibiotics. The acetic acid side chain is frequently used to modify the core beta-lactam ring, enhancing the antibiotic’s resistance to bacterial enzymes (like beta-lactamases) and broadening its spectrum of activity. Procurement managers in the pharmaceutical industry rely on Xinchem’s consistent bulk supply to maintain their critical antibiotic production schedules.

[Image 2 Placeholder: Pharmaceutical scientists utilizing p-nitrophenylacetic acid as a propranolol precursor and penicillin precursor in drug development.]

4. Applications in Agrochemicals and Dyes

Beyond human health, the utility of 4-nitrobenzeneacetic acid extends into the agricultural and materials sectors.

4.1 Agrochemical Intermediate

As an agrochemical intermediate, this compound is employed in the synthesis of advanced crop protection agents, including highly selective herbicides and fungicides. In agrochemical formulation, the environmental profile and target specificity of the active ingredient are paramount. The aromatic structure provided by this intermediate helps in designing molecules that are highly toxic to specific pests while degrading safely in the soil.

4.2 Dye Intermediate

In the specialty chemicals and materials industry, it acts as a crucial dye intermediate. The nitro group can be reduced to an aniline derivative, which is a classic starting point for azo dye synthesis. These dyes are used in high-end textiles, specialized plastics, and advanced imaging technologies. Xinchem’s expertise in pigment dyes https://www.xinchem.com/pigment-dye/ complements our ability to supply high-quality intermediates for the colorant industry.

[Image 3 Placeholder: Chemical engineers formulating agrochemical intermediate and dye intermediate using 4-nitrobenzeneacetic acid.]

5. A Core Organic Synthesis Building Block

In the broader scope of academic research and industrial R&D, 4-Nitrophenylacetic Acid is a staple organic synthesis building block. It is frequently used in the preparation of more complex aromatic heterocyclic derivatives https://www.xinchem.com/aromatic-heterocyclic-derivatives/ and linear chain derivatives https://www.xinchem.com/linear-chain-derivatives/.

Chemists utilize the carboxylic acid group for esterification, amidation, and coupling reactions, while the nitro group can undergo reduction, nucleophilic aromatic substitution, or serve as a directing group for further electrophilic aromatic substitution. This dual reactivity makes it an invaluable tool for generating diverse chemical libraries during the lead optimization phase of drug discovery.

6. Xinchem’s Custom Synthesis and Contract Manufacturing

Scaling up from a laboratory bench to commercial production is a complex challenge fraught with engineering and safety hurdles. Xinchem excels in bridging this gap through our comprehensive custom synthesis and contract manufacturing services.

When you partner with Xinchem, you gain access to state-of-the-art manufacturing facilities capable of handling complex, multi-step syntheses. Nitration and subsequent reduction reactions require strict thermal control and safety protocols. Our process engineers specialize in optimizing these reaction conditions, improving yield, and minimizing environmental impact. Whether you require a few kilograms for clinical trials or multi-ton quantities for commercial launch, our scalable infrastructure ensures seamless technology transfer.

Learn more about our advanced manufacturing processes and technology: https://www.xinchem.com/technology/

[Image 4 Placeholder: Industrial scale contract manufacturing of organic synthesis building block at Xinchem chemical facility.]

7. Quality Assurance and Analytical Testing

For production managers, the consistency of raw materials is non-negotiable. Xinchem operates under strict Quality Management Systems (QMS) to ensure that every batch of 4-Nitrophenylacetic Acid meets exact specifications.

Our analytical testing protocols include:

• High-Performance Liquid Chromatography (HPLC) for precise purity profiling.
• Nuclear Magnetic Resonance (NMR) spectroscopy for structural verification.
• Karl Fischer titration for precise moisture determination.
• Heavy metal and residue solvent analysis to comply with international pharmaceutical guidelines (such as ICH).

This rigorous QA/QC framework guarantees that our pharmaceutical intermediate will perform predictably in your downstream processes, safeguarding your final product’s integrity. Explore our diverse range of high-quality products: https://www.xinchem.com/products/

8. Safety, Handling, and Storage Guidelines for Process Engineers

Safety engineers must implement robust protocols when handling 4-nitrobenzeneacetic acid. While it is a stable crystalline solid, standard industrial hygiene practices are mandatory.

• Personal Protective Equipment (PPE): Operators must wear approved dust masks or respirators, chemical-resistant gloves, and safety goggles to prevent inhalation of dust and skin/eye contact.
• Handling: Avoid generating dust. Ensure operations are conducted under local exhaust ventilation (LEV).
• Storage: The compound should be stored in a cool, dry, and well-ventilated warehouse. It must be kept away from strong oxidizing agents and strong bases.
• Packaging: Xinchem typically supplies this product in 25kg fiber drums with double-layered PE inner bags to prevent moisture ingress and contamination during global transit.

Always refer to the latest Safety Data Sheet (SDS) provided by Xinchem for comprehensive safety information.

9. Supply Chain Reliability and Procurement Strategy

In today’s volatile global market, procurement managers face the constant challenge of mitigating supply chain risks. Relying on a single-source supplier without robust manufacturing capabilities can lead to catastrophic production halts.

Xinchem mitigates this risk by offering a vertically integrated supply chain. By controlling the synthesis of key precursors, including amino acid derivatives https://www.xinchem.com/amino-acid-derivatives/ and various additives https://www.xinchem.com/various-additives/, we insulate our clients from raw material shortages. Our transparent communication, competitive pricing, and reliable lead times make us the preferred partner for leading pharmaceutical and chemical companies worldwide.

Stay updated with our latest developments and industry insights by visiting our news section: https://www.xinchem.com/news/

10. Conclusion: Partnering with Xinchem

4-Nitrophenylacetic Acid (CAS 104-03-0) is more than just a chemical; it is a vital catalyst for innovation in drug discovery, agriculture, and material science. Whether you are utilizing it as a propranolol precursor or a versatile organic synthesis building block, the quality of your source material defines your success.

Xinchem combines deep chemical expertise, advanced contract manufacturing capabilities, and an unwavering commitment to quality to deliver superior pharmaceutical intermediates. We invite process engineers, procurement managers, and R&D directors to experience the Xinchem difference.

Ready to optimize your supply chain? Contact Xinchem today to discuss your custom synthesis needs and request a quote: https://www.xinchem.com/

11. Frequently Asked Questions (FAQ)

Q1: What makes 4-Nitrophenylacetic Acid a valuable pharmaceutical intermediate? A1: Its value lies in its bifunctional nature. It possesses both a reactive carboxylic acid group (ideal for amidation and esterification) and a nitro group that can be easily reduced to an amine. This allows chemists to build complex molecular scaffolds, making it essential for synthesizing cardiovascular drugs and antibiotics.

Q2: Can Xinchem scale up production from R&D quantities to commercial bulk? A2: Yes. Xinchem specializes in custom synthesis and contract manufacturing. We can seamlessly scale production from kilogram quantities for laboratory research and clinical trials to multi-ton commercial bulk orders, ensuring consistent quality throughout the scale-up process.

Q3: What are the storage requirements for p-nitrophenylacetic acid? A3: It should be stored in a cool, dry, and well-ventilated area, tightly sealed in its original packaging (typically fiber drums with PE liners). It must be kept away from incompatible materials such as strong oxidizing agents and strong bases to maintain its high purity.

Q4: Does Xinchem provide full analytical documentation with each shipment? A4: Absolutely. Every batch of our 4-Nitrophenylacetic Acid comes with a comprehensive Certificate of Analysis (CoA), detailing HPLC purity, moisture content, and other critical technical specifications to ensure it meets your strict manufacturing requirements.