Description

Pigment Red 5 is a synthetic organic pigment belonging to the Naphthol AS pigment class, known for its clean, yellowish-red hue and excellent color strength. This high-performance pigment is valued for its good lightfastness and solvent resistance, making it a reliable choice for demanding applications. It is primarily used by manufacturers in the coatings, plastics, and printing ink industries to achieve vibrant and durable coloration.

Application

• Industrial Coatings: Used in automotive primers, industrial maintenance paints, and coil coatings for its durability.
• Plastics Coloring: Imparts a stable red color to polyolefins (PP, PE), PVC, and other engineering plastics.
• Printing Inks: A key component in offset, flexographic, and gravure inks for packaging and publications.
• Masterbatch Production: Employed in the manufacture of color concentrates for uniform dispersion in polymer processing.
• Textile Printing: Used in pigment printing pastes for fabrics.
• Specialty Applications: Suitable for coloring artists' colors, chalks, and other specialty products.

Basic Information

Product Name	Pigment Red 5
CAS No.	6410-41-9
Molecular Formula	C26H20ClN3O4S
Molecular Weight	514.97 g/mol
Synonyms	C.I. Pigment Red 5; Naphthol Red; Permanent Red FRR; C.I. 12490; 3-Hydroxy-4-[(2-methoxy-5-nitrophenyl)azo]-N-(4-chloro-2,5-dimethoxyphenyl)-2-naphthamide; Pigment Scarlet; Toluidine Red (related but distinct)
EINECS	229-094-1

Quality Control

Our Pigment Red 5 is manufactured under a strict quality management system. Every batch is tested against key parameters including color strength, hue, particle size distribution, and chemical purity to ensure consistent performance. While not typically a pharmaceutical-grade product, production adheres to industrial quality standards. A Certificate of Analysis (COA) detailing specific batch results is available upon request.

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.

Specification

Item	Specification
Appearance	Red Powder
Color Strength	95 - 105% (vs. Standard)
Hue	Within agreed tolerance
Particle Size (D50)	< 5.0 μm
Volatile Matter (at 105°C)	< 2.0 %
Water Soluble Matter	< 1.5 %
Lightfastness (1-8)	≥ 6
Heat Resistance (°C)	≥ 180

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