Description

Hydrogen [5-Chloro-3-[(4,5-Dihydro-3-Methyl-5-Oxo-1-Phenyl-1H-Pyrazol-4-Yl)Azo]-2-Hydroxybenzenesulphonato(3-)]Hydroxychromate(1-) is a complex chromium-based azo dye lake, a high-performance pigment known for its excellent color strength and stability. This compound is engineered to provide superior performance in demanding applications where color consistency and durability are critical. It is primarily utilized by manufacturers in the coatings, plastics, and specialty inks industries seeking vibrant, lightfast, and heat-stable colorants.

Application

• Industrial Coatings and Paints: Used as a high-performance pigment for automotive, coil, and industrial maintenance coatings requiring excellent weatherability and chemical resistance.
• Plastics and Masterbatch Coloring: Imparts stable and vibrant coloration to engineering plastics, PVC, polyolefins, and synthetic fibers, with good dispersion and heat stability during processing.
• Specialty Printing Inks: A key component in high-quality inks for packaging, security printing, and other applications demanding intense color and fastness properties.
• Artists' and Professional Grade Paints: Employed in the formulation of high-end oil and acrylic paints where pigment permanence and color purity are paramount.
• Textile Pigment Printing: Provides durable and wash-fast colors in pigment printing processes for fabrics.

Basic Information

Product Name	Hydrogen [5-Chloro-3-[(4,5-Dihydro-3-Methyl-5-Oxo-1-Phenyl-1H-Pyrazol-4-Yl)Azo]-2-Hydroxybenzenesulphonato(3-)]Hydroxychromate(1-)
CAS No.	85443-60-3
Molecular Formula	C16H11ClCrN4O7S
Molecular Weight	482.80 g/mol
Synonyms	Pigment Red 187; C.I. 12467; 5-Chloro-3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxybenzenesulfonic acid, chromium complex; Chromium complex of 3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-4-hydroxy-5-chlorobenzenesulfonic acid; C.I. Pigment Red 187; PR 187; Azo Chromium Lake Red
EINECS	Contact for details

Quality Control

Our production of Pigment Red 187 adheres to stringent quality protocols to ensure batch-to-batch consistency in coloristic and physical properties. Quality is verified through comprehensive testing including spectrophotometric color strength, particle size distribution, and thermal stability assessments. A detailed Certificate of Analysis (COA) documenting purity, heavy metal content, and key performance specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect flow properties and performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms to Standard
Color Strength	95 - 105% (vs. Std.)
Hue	Within agreed tolerance
Moisture (Karl Fischer)	≤ 2.0 %
Residue on Sieve (63 µm)	≤ 0.5 %
Specific Surface Area (BET)	Contact for details
Heavy Metals (as Pb)	≤ 50 ppm

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