4-Nitrophenol, identified by the CAS number 100-02-7, is a compound that bridges fundamental chemical properties with sophisticated applications in advanced scientific fields like peptide synthesis and analytical chemistry. Its distinctive yellow crystalline appearance and versatile chemical behavior make it a compound of significant interest. NINGBO INNO PHARMCHEM CO.,LTD. is committed to supplying high-purity 4-nitrophenol to support these critical areas.

In the complex arena of peptide synthesis, 4-nitrophenol plays a crucial role through its derivatives. Carboxylate ester derivatives of 4-nitrophenol are employed as activated components that facilitate the formation of amide bonds, the essential linkages in peptide chains. This sophisticated application is vital for the development of peptides used in pharmaceuticals, diagnostics, and research. The precise contribution of 4-nitrophenol in peptide synthesis is key to creating custom biomolecules.

Furthermore, 4-nitrophenol serves as an important tool in analytical chemistry, primarily as a pH indicator. With a pKa of 7.16, it exhibits a clear color change from colorless/pale yellow to bright yellow as the pH shifts into the alkaline range. This property makes it invaluable for accurate pH measurements in laboratories, supporting research and quality control across various scientific disciplines. The reliable performance of the 4-nitrophenol pH indicator is a cornerstone of many analytical procedures.

Beyond these specialized uses, 4-nitrophenol is a foundational intermediate in broader industrial applications. It is a critical component in the synthesis of dyes and pigments, contributing to the vast array of colors used in consumer products. Its role as a p-nitrophenol dye precursor ensures the vibrancy and stability of these colorants. Moreover, it is a significant 4-nitrophenol pharmaceutical intermediate, crucial for the production of essential medicines.

For organizations requiring a steady supply of this versatile chemical, the ability to buy para-nitrophenol online from trusted 4-nitrophenol manufacturers is essential. NINGBO INNO PHARMCHEM CO.,LTD. provides not only high-quality product but also comprehensive safety data, including the 4-nitrophenol MSDS, to ensure responsible handling and usage. The diverse 4-nitrophenol industrial applications continue to expand, making it a vital compound in modern chemistry.