Description

Pigment Permanent Red F5Rk CAS NO 1211-16-1 is a high-performance, synthetic organic pigment belonging to the Naphthol AS series, valued for its excellent color strength and durability. This pigment provides a vibrant, bluish-red shade with strong tinting power and good resistance properties, making it a critical component for creating long-lasting colors. It is primarily needed by manufacturers in the coatings, plastics, printing inks, and synthetic fiber industries where consistent, fade-resistant coloration is essential.

Application

• Industrial Coatings and Paints: Used in automotive, architectural, and industrial maintenance paints for its weatherfastness and color stability.
• Plastics and Masterbatch Coloring: Imparts a bright red hue to PVC, polyolefins, and other polymers, offering good dispersion and heat stability.
• Printing Inks: A key component in offset, gravure, and flexographic inks for packaging and publications due to its color intensity and print quality.
• Synthetic Fibers: Employed in the mass coloration of fibers like polypropylene and viscose.
• Artists' Colors: Used in the formulation of high-grade artists' oils, acrylics, and watercolors.
• Leather and Textile Finishing: Applied in coatings and finishes for leather goods and specialty textiles.

Basic Information

Product Name	Pigment Permanent Red F5Rk
CAS No.	1211-16-1
Molecular Formula	C25H19N3O5
Molecular Weight	441.44 g/mol
Synonyms	Pigment Red 170; C.I. 12475; Naphthol Red F5RK; Permanent Red F5RK; C.I. Pigment Red 170; 5-[(2-Methoxy-5-methyl-4-sulfophenyl)azo]-6-hydroxy-N-(3-methylphenyl)-2-naphthalenecarboxamide; Azo Condensation Pigment Red 170; Fast Red F5RK
EINECS	214-943-6

Quality Control

Our Pigment Permanent Red F5Rk is manufactured under a stringent quality management system. Every batch is tested against rigorous in-house specifications to ensure consistent coloristic properties, particle size distribution, and chemical purity. A comprehensive Certificate of Analysis (COA) detailing parameters such as hue, strength, and residue on sieve is available upon request to guarantee it meets your specific application requirements.

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 incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Residue on Sieve (63 µm)	≤ 1.0 %
Volatile Matter (at 105°C)	≤ 2.0 %
pH Value (10% Aqueous Slurry)	6.0 - 8.0
Oil Absorption	40 - 60 g/100g

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