Description

C.I. Leuco Sulfur Brown 11 is a specialized sulfur dye intermediate, also known as a leuco sulfur dye. This compound is critical for achieving deep, durable brown shades with excellent wash and light fastness properties on cellulosic fibers like cotton and viscose. It is primarily used by textile dye manufacturers and industrial finishers seeking cost-effective, high-performance coloring solutions for denim, workwear, and home textiles.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, and other cellulosic fibers to produce brown colorations.
• Denim Production: Used in the manufacture of denim fabrics to achieve specific brown and khaki shades, often for garment finishing.
• Workwear and Uniform Fabrics: Ideal for dyeing fabrics requiring durable, dark colors with good fastness to washing and light.
• Home Textiles: Applied in the coloring of towels, bed linens, and upholstery fabrics where color stability is important.
• Yarn Dyeing: Suitable for package dyeing and other yarn dyeing processes for woven and knitted goods.
• Leather Coloring: Can be used in certain leather dyeing applications to impart brown tones.

Basic Information

Item	Detail
Product Name	C.I. Leuco Sulfur Brown 11
CAS No.	12239-61-1
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Sulfur Brown 11 (Leuco form); Leuco Sulphur Brown 11; C.I. 53055; Sulfur Brown GD Leuco; Immedial Brown G Leuco; Kayaku Sulphur Brown G Leuco; Leuco Sulfur Brown G; Dye Intermediate for Sulfur Brown
EINECS	Contact for details

Quality Control

Our C.I. Leuco Sulfur Brown 11 is manufactured under a strict quality management system. Each batch undergoes rigorous testing to ensure consistent shade, strength, and application performance. Certificates of Analysis (COA) documenting key parameters such as color value, solubility, and impurity content 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, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Brownish powder or paste
Color Strength	Standard depth ± 5%
Solubility (in alkali)	Clear solution
Moisture Content	≤ 5.0%
Ash Content	≤ 2.0%
Application Fastness	To match standard sample

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