Description

C.I. Direct Red 258 is a high-performance, water-soluble azo dye belonging to the direct dye class, valued for its strong affinity to cellulosic fibers. Its primary commercial value lies in providing excellent wash and light fastness properties, delivering vibrant and durable red shades. This product is essential for industrial operations in the textile dyeing and paper coloring sectors, where consistent color strength and batch-to-batch uniformity are critical for quality assurance.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers, offering good exhaustion and leveling properties.
• Paper Coloring: Used in the mass coloration of paper and paperboard to achieve uniform red hues.
• Leather Finishing: Employed in the dyeing of leather goods where a direct dyeing process is applicable.
• Ink Formulation: A colorant component in the manufacture of certain types of inks, including stamp pad and flexographic inks.
• Biological Staining: Potential use as a histological stain in laboratory settings, though specific grades must be verified.
• Craft and Specialty Dyes: Suitable for use in educational kits or artisanal dyeing projects requiring direct dyes.

Basic Information

Product Name	C.I. Direct Red 258
CAS No.	88358-67-2
Molecular Formula	C29H19N7Na2O8S2
Molecular Weight	711.61 g/mol
Synonyms	Direct Red 258; Direct Fast Scarlet 4BS; C.I. 29167; Direct Scarlet 4BS; Pontamine Scarlet 4BS; Amanil Scarlet 4BS; Atul Direct Scarlet 4BS; Dinamine Scarlet 4BS
EINECS	Contact for details

Quality Control

Our C.I. Direct Red 258 is manufactured under a stringent quality management system to ensure it meets the exacting standards of industrial dye users. Every batch is tested for critical parameters including color strength, shade, solubility, and impurity profile to guarantee consistent performance in your application. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with each shipment.

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 material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Fastness Properties	Typical data available

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