Description

Chromium, 2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-one 3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-4-hydroxybenzenesulfonamide 4-hydroxy-3-[(2-hydroxy-1-naphthalenyl)azo]benzenesulfonamide N-[7-hydro is a complex, high-purity chromium-based azo dye intermediate. This compound is engineered for applications requiring precise color formation and excellent metal-complex stability. It is a critical raw material for manufacturers in the pigments, specialty inks, and advanced coatings industries seeking consistent batch-to-batch performance.

Application

• Primary synthesis intermediate for high-performance metal-complex azo pigments.
• Key component in the formulation of specialty industrial inks for printing and coding.
• Used in the production of colored coatings and paints requiring enhanced lightfastness and weather resistance.
• Precursor in the manufacture of dyes for plastics and synthetic fibers.
• Potential use in the development of functional colorants for security printing applications.
• Research and development of novel chromogenic materials in analytical chemistry.

Basic Information

Product Name	Chromium, 2,4-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-one 3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-4-hydroxybenzenesulfonamide 4-hydroxy-3-[(2-hydroxy-1-naphthalenyl)azo]benzenesulfonamide N-[7-hydro
CAS No.	72968-18-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Pigment Brown 5; Chromium Complex Brown 5; Azo Chromium Complex; 1:2 Metal Complex Dye Intermediate; Chromium(3+) complex of 4-[(2-hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one and 3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-4-hydroxybenzenesulfonamide and 4-hydroxy-3-[(2-hydroxynaphthalen-1-yl)azo]benzenesulfonamide; Chromium Brown 5; Metal complex pigment intermediate.
EINECS	Contact for details

Quality Control

Our production of this chromium complex adheres to rigorous quality control protocols to ensure chemical identity, purity, and batch consistency. Each lot is analyzed against stringent internal specifications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with every shipment to support your quality assurance systems.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents. The container must be kept tightly closed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Brown to dark brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Chromium Content	Contact for details

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