Description

C.I. Sulphur Blue 4 is a synthetic sulfur dye belonging to the class of sulfur dyes, known for their excellent wash and light fastness properties on cellulosic fibers. This specific dye is valued for its ability to produce deep, economical blue shades with good overall fastness. It is primarily used in the textile industry for dyeing and printing cotton, viscose, and other cellulose-based materials, offering a cost-effective solution for achieving durable color.

Application

• Dyeing of 100% cotton fabrics and yarns for apparel and home textiles.
• Dyeing of regenerated cellulose fibers such as viscose and rayon.
• Printing applications on cellulosic substrates.
• Production of workwear, denim, and other durable textiles requiring good wash fastness.
• Dyeing of blended fabrics where the cellulosic component is targeted.
• Used in combination with other sulfur dyes to achieve a wide range of navy, black, and blue shades.

Basic Information

Product Name	C.I. Sulphur Blue 4
CAS No.	104491-89-6
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Sulfur Blue 4; C.I. 53440; Sulphur Blue 4; C.I. Sulphur Blue 4; Sulphur Blue BN; Kayaku Sulphur Blue 4; Sulphur Blue BNF; Diresul Blue RDT; Solfo Blue BN
EINECS	Contact for details

Quality Control

Our C.I. Sulphur Blue 4 is manufactured under a strict quality management system. Each batch undergoes rigorous testing for key parameters including shade, strength, solubility, and fastness properties to ensure consistent performance and compliance with industry standards. Certificates of Analysis (COA) detailing these specifications are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials. Keep container tightly sealed when not in use to minimize moisture absorption and dust contamination.

Specification

Item	Specification
Appearance	Blue to Bluish-Black Powder/Granules
Shade	Conforms to Standard
Strength	100% ± 3%
Moisture Content	≤ 5.0%
Water Solubility	Conforms to Standard
Alkali Solubility	Conforms to Standard
Fastness to Washing	≥ 3-4 (ISO 105-C03)
Fastness to Light	≥ 4 (ISO 105-B02)

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