Description

1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-, reaction products with guanidine hydrochloride N,N'-bis(mixed Ph, tolyl and xylyl) derivs. is a specialized, high-performance organic pigment derivative. This compound is engineered to deliver exceptional color strength and stability, making it a critical component for demanding applications. It is primarily sought after by manufacturers in the coatings, inks, and plastics industries who require durable and vibrant coloration.

Application

• High-Performance Industrial Coatings: Used in automotive, coil, and marine coatings for superior weatherfastness and chemical resistance.
• Specialty Printing Inks: Formulated into packaging, security, and decorative inks requiring excellent lightfastness and print quality.
• Engineering Plastics and Polymers: Imparts stable coloration to high-temperature processing polymers like nylon, polyester, and ABS.
• Pigment Preparation and Masterbatch: Serves as a key intermediate or additive in the production of concentrated colorants and pigment dispersions.
• Textile Dyeing and Printing: Employed in processes demanding high color yield and wash-fastness on synthetic fibers.
• Lacquers and Wood Finishes: Provides deep, lasting color for furniture and architectural wood coatings.

Basic Information

Product Name	1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-, reaction products with guanidine hydrochloride N,N'-bis(mixed Ph, tolyl and xylyl) derivs.
CAS No.	71077-14-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Pigment Yellow 191; C.I. 18795; PY 191; 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-, guanidine hydrochloride N,N'-bis(mixed phenyl, tolyl and xylyl) derivatives; Reaction products of 1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-5-pyrazolone-3-carboxylic acid with guanidine hydrochloride and mixed diarylamines; Guanidine, N,N'-bis(mixed Ph, tolyl and xylyl)-, reaction products with 1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-5-pyrazolone-3-carboxylic acid hydrochloride
EINECS	Contact for details

Quality Control

Our production of Pigment Yellow 191 (CAS 71077-14-0) adheres to stringent quality management protocols. Every batch undergoes comprehensive analysis to ensure consistent performance in color strength, hue, and physical properties. Certificates of Analysis (COA) detailing purity, shade, and application-specific tests are available upon request to support your quality assurance and regulatory compliance needs.

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 and incompatible materials.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Moisture Content	≤ 2.0%
Ash Content	≤ 1.0%
Water Soluble Matter	≤ 1.0%
Particle Size (Typical)	Contact for details

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