Description

4-Nitrosophenol is a versatile organic intermediate characterized by its distinct nitroso functional group. This compound is valued for its role in synthesizing dyes, pigments, and more complex chemical architectures. It is particularly relevant for manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking reliable building blocks for research and production.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of azo dyes and other complex colorants.
• Pharmaceutical Synthesis: Used as a building block in the preparation of certain active pharmaceutical ingredients (APIs).
• Agrochemical Production: Serves as an intermediate in the manufacture of pesticides and herbicides.
• Chemical Research & Development: Employed in organic synthesis for the introduction of the nitroso group.
• Photographic Chemicals: Historically used in certain photographic development processes.
• Polymer Modification: Can be used to modify polymer properties or as a monomer in specialty polymer synthesis.

Basic Information

Product Name	4-Nitrosophenol
CAS No.	637-62-7
Molecular Formula	C6H5NO2
Molecular Weight	123.11 g/mol
Synonyms	p-Nitrosophenol; 4-Hydroxynitrosobenzene; Quinone monoxime; 1,4-Benzoquinone monoxime; Phenol, 4-nitroso-; NOPS; 4-Nitrosophenol, 98%
EINECS	211-306-4

Quality Control

Our 4-Nitrosophenol is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing specific results are available for every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials. Due to its light-sensitive and easily oxidized nature, it is recommended to store under an inert atmosphere for long-term stability. Keep container tightly sealed when not in use.

Specification

Item	Specification
Appearance	Yellow to brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	124 - 128 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.