Description

Chlorantine Fast Red 5B is a high-performance, synthetic organic pigment belonging to the azo chemical class. This product is valued for its excellent color strength, good lightfastness, and strong tinting properties in various industrial applications. It is primarily utilized by manufacturers in the plastics, coatings, inks, and textile industries seeking a reliable and vibrant red colorant. Consistent quality and batch-to-batch uniformity are critical for ensuring final product performance.

Application

• Plastics Coloring: Used for the mass coloration of polyolefins (PP, PE), PVC, and engineering plastics, providing good dispersion and heat stability.
• Industrial Coatings: Imparts durable and vivid red shades in solvent-based and water-based industrial paints and protective coatings.
• Printing Inks: A key pigment for producing high-quality packaging inks, publication gravure inks, and flexographic inks.
• Textile Pigment Printing: Employed in the pigment printing of fabrics, offering good wash and rub fastness.
• Masterbatch Production: An essential colorant for manufacturing concentrated color masterbatches used in plastic processing.
• Specialty Applications: Suitable for coloring synthetic fibers, leather finishes, and other specialty materials requiring a stable red hue.

Basic Information

Product Name	Chlorantine Fast Red 5B
CAS No.	2610-11-9
Molecular Formula	C25H20ClN7O8S2
Molecular Weight	670.06 g/mol
Synonyms	C.I. Pigment Red 112; C.I. 12370; Permanent Red FGR; Pigment Red 112; Fast Red 5B; Red 5B; 1-[(2-Chloro-5-nitrophenyl)azo]-2-hydroxy-3-naphthanilide; 1-[(2-Chloro-5-nitrophenyl)azo]-2-naphthol-3-carboxyanilide; Naphthol AS-based azo pigment
EINECS	220-036-6

Quality Control

Our Chlorantine Fast Red 5B is manufactured under a strict quality management system. Every batch is tested against rigorous internal specifications to ensure consistent coloristic properties, chemical purity, and physical performance. Key parameters such as color strength, hue, particle size distribution, and thermal stability are monitored. A Certificate of Analysis (COA) detailing these results is provided with each shipment to guarantee compliance with your technical 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). This product is hygroscopic (moisture-sensitive); keep the original container tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Purity (HPLC)	≥ 96.0%
Moisture Content	≤ 2.0%
Residue on Sieve (63 µm)	≤ 1.0%
pH Value (10% Aqueous Slurry)	6.0 - 8.0
Specific Properties (e.g., Heat Stability)	Contact for details

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