Description

2,4-Dihydro-4-[(2-Hydroxy-5-Nitrophenyl)Azo]-5-Methyl-2-Phenyl-3H-Pyrazol-3-One Chromium Complex is a high-performance chromium complex dye, valued for its excellent light and heat stability. This compound is a critical component in the formulation of durable, high-quality pigments for demanding industrial applications. It is primarily sought after by manufacturers in the coatings, plastics, and specialty ink industries where superior color fastness and chemical resistance are paramount.

Application

• High-Performance Industrial Coatings: Used in automotive, coil, and industrial maintenance paints for enhanced UV and weather resistance.
• Plastics and Masterbatch Coloring: Imparts stable, vibrant colors to engineering plastics, PVC, and polyolefins during high-temperature processing.
• Specialty Printing Inks: A key pigment for security inks, packaging inks, and other applications requiring high durability and chemical inertness.
• Synthetic Fibers: Employed in the mass coloration of fibers where excellent wash and light fastness are required.
• Artists' Colors and Pigment Preparations: Used in the manufacture of high-grade artists' paints and concentrated pigment preparations.

Basic Information

Product Name	2,4-Dihydro-4-[(2-Hydroxy-5-Nitrophenyl)Azo]-5-Methyl-2-Phenyl-3H-Pyrazol-3-One Chromium Complex
CAS No.	52256-37-8
Molecular Formula	C16H12CrN5O5
Molecular Weight	406.30 g/mol
Synonyms	C.I. Pigment Brown 29; Chromium Complex Brown; 4-[(2-Hydroxy-5-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-one chromium complex; 1-(2-Hydroxy-5-nitrophenyl)azo-3-methyl-5-pyrazolone chromium complex; Azo Pyrazolone Chromium Complex Brown; Chromium brown complex; Pigment Brown 29 (C.I. 71129)
EINECS	257-774-6

Quality Control

Every batch of our chromium complex pigment is produced under strict quality management and undergoes comprehensive analytical testing to ensure batch-to-batch consistency and performance. We provide a detailed Certificate of Analysis (COA) with each shipment, confirming key parameters such as purity, shade strength, and physical properties. Our quality systems are designed to meet the stringent requirements of global industrial applications.

Storage

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

Specification

Item	Specification
Appearance	Brown Powder
Identification (IR)	Conforms
Assay (Chromium Content)	≥ 95.0%
Loss on Drying	≤ 2.0%
Ash Content	≤ 1.0%
Particle Size (Median, D50)	≤ 5.0 μm
Heavy Metals (as Pb)	≤ 50 ppm
Solubility (in water)	Practically Insoluble

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