Description

p-Nitrosotoluene CAS NO 623-11-0 is an important aromatic nitroso compound, serving as a versatile intermediate in organic synthesis. Its primary commercial value lies in its role as a precursor for dyes, pigments, and other fine chemicals, where its reactive nitroso group enables key transformations. This product is essential for manufacturers in the dyestuff, pharmaceutical, and agrochemical industries seeking reliable, high-purity building blocks for complex molecule production.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of various azo dyes and organic pigments.
• Pharmaceutical Synthesis: Used as a building block for manufacturing specific active pharmaceutical ingredients (APIs) and research chemicals.
• Agrochemical Production: Employed in the synthesis of certain herbicides, pesticides, and plant growth regulators.
• Chemical Research & Development: Serves as a reagent in organic chemistry research for nitrosation and coupling reactions.
• Photographic Chemicals: Historically used in some photographic development processes.
• Rubber Chemicals: Can be utilized in the production of certain vulcanization accelerators and antioxidants.

Basic Information

Product Name	p-Nitrosotoluene
CAS No.	623-11-0
Molecular Formula	C7H7NO
Molecular Weight	121.14 g/mol
Synonyms	4-Methylnitrosobenzene; 4-Nitrosotoluene; p-Tolylnitroso; 1-Methyl-4-nitrosobenzene; Nitroso-p-toluene; p-Methylnitrosobenzene; Toluene, p-nitroso-; NSC 404044
EINECS	210-782-0

Quality Control

Our p-Nitrosotoluene is manufactured under strict quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC and GC analysis, to ensure high purity and consistency. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles 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 place at room temperature (15-25°C). This material is light-sensitive and easily oxidized; prolonged exposure to light or air should be avoided. For long-term storage, consider an inert atmosphere.

Specification

Item	Specification
Appearance	Green to brown crystalline powder or flakes
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	48 - 52 °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.