Description

Sulphur Brown 4 is a synthetic organic dye belonging to the sulphur dye class, identified by CAS No. 1326-90-5. This product is valued for its excellent color fastness properties, particularly its resistance to washing and light, making it a durable and reliable coloring agent. It is primarily needed by manufacturers in the textile industry for dyeing cellulosic fibers like cotton and viscose, as well as for applications in leather processing.

Application

• Primary dyeing of cotton fabrics and yarns.
• Coloration of viscose rayon and other regenerated cellulose fibers.
• Dyeing of leather goods, providing deep, rich brown shades.
• Used in the production of denim and other heavy-duty apparel.
• Application in home textiles such as upholstery and curtains for its wash-fastness.
• Potential use in coloring paper and specialty packaging materials.

Basic Information

Product Name	Sulphur Brown 4
CAS No.	1326-90-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Sulfur Brown 4; C.I. 53215; C.I. Sulphur Brown 4; Sulphur Brown G; Sulphur Brown GD; Leather Brown G; C.I. 53215; Kayaku Sulphur Brown G
EINECS	Contact for details

Quality Control

Our Sulphur Brown 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 consistency and performance. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance protocols.

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	Brown Powder
Shade	Conforms to Standard
Strength	100% ± 3%
Moisture Content	≤ 5.0%
Water Solubility	Conforms to Standard
Fastness to Washing	≥ 4 (Grey Scale)
Fastness to Light	≥ 4 (Blue Wool Scale)

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