Description

Trihydrogen bis[5-chloro-3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxybenzenesulphonato(3-)]chromate(3-), compound with N,N'-diphenylguanidine (1:3) is a complex chromium-based azo dye salt, specifically formulated with a guanidine derivative to enhance its stability and application properties. This compound matters for its role as a high-performance colorant, offering excellent lightfastness and thermal stability for demanding industrial applications. It is primarily needed by manufacturers in the pigment and dye industries, particularly for coloring plastics, coatings, and specialty inks where durability is critical.

Application

• Pigmentation of Engineering Plastics: Imparts stable, vibrant color to high-temperature processing polymers such as polycarbonate, nylon, and ABS.
• Industrial Coatings and Paints: Used in formulations for automotive, coil, and powder coatings requiring superior weatherability and UV resistance.
• Specialty Printing Inks: Serves as a key colorant for security inks, packaging inks, and other high-performance printing applications.
• Synthetic Fiber Dyeing: Applicable for the mass coloration of synthetic fibers during the polymer melt stage.
• Masterbatch Production: A concentrated colorant for creating pigment masterbatches used across the plastics industry.
• Coloration of Elastomers and Rubber: Provides color stability in vulcanized rubber products and silicone materials.

Basic Information

Item	Details
Product Name	Trihydrogen bis[5-chloro-3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxybenzenesulphonato(3-)]chromate(3-), compound with N,N'-diphenylguanidine (1:3)
CAS No.	72812-33-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Pigment Red 187; C.I. 12467; Chromate(3-), bis[5-chloro-3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxybenzenesulfonato(3-)]-, trihydrogen, compd. with N,N'-diphenylguanidine (1:3); Pigment Red 187; PR 187; N,N'-Diphenylguanidinium trihydrogen bis[5-chloro-3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxybenzenesulphonate]chromate; Chromium complex of an azo dye
EINECS	Contact for details

Quality Control

Our Pigment Red 187 is produced under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot undergoes comprehensive analysis, including strength, shade, and physical property testing, to meet precise customer specifications. Certificates of Analysis (COA) documenting purity, heavy metal content, and other critical parameters are available upon request, supporting compliance in global supply chains.

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). Keep away from strong oxidizing agents. The container must be kept tightly closed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Moisture Content	≤ 2.0%
Residue on Sieve (63 µm)	≤ 1.0%
Specific Heavy Metals (Pb, Cd, Hg)	Contact for details
Application Performance (in plastic)	Heat Stability: ≥ 300°C; Lightfastness: ≥ 7-8 (Blue Scale)

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