Description

Sulphur Blue 7 -Leuco is a key leuco intermediate in the synthesis of Sulphur Blue 7, a prominent sulfur dye. This compound matters for its role in producing cost-effective, wash-fast, and lightfast blue dyes for cellulosic fibers. Industries that need it include textile manufacturers and dye producers seeking durable colorants for denim, workwear, and other heavy-duty fabrics. Its consistent quality is critical for ensuring batch-to-batch reproducibility in final dye production.

Application

• Primary intermediate for the synthesis of Sulphur Blue 7 dye.
• Manufacturing of sulfur dyes for the textile industry, particularly for cotton and other cellulosic fibers.
• Production of dyes for denim and indigo-style fabrics requiring high wash fastness.
• Coloration of workwear, uniforms, and other heavy-duty textiles where durability is paramount.
• Potential use in the dyeing of paper and leather goods.
• Research and development of new dye formulations and color shades within industrial laboratories.

Basic Information

Item	Details
Product Name	Sulphur Blue 7 -Leuco
CAS No.	69900-21-6
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Sulfur Blue 7 Leuco Base; Leuco Sulphur Blue 7; C.I. Leuco Sulphur Blue 7; 69900-21-6; Vat Blue 43 Leuco Form; Sulphur Blue Leuco Intermediate; Blue 7 Leuco Sulphur Dye Intermediate
EINECS	Contact for details

Quality Control

Our Sulphur Blue 7 -Leuco is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications for optimal performance in dye synthesis. A Certificate of Analysis (COA) detailing purity, identity, and other critical parameters is 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 and incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to black powder or paste
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Moisture Content	Max. 2.0%
Ash Content	Max. 1.0%
Solubility	Soluble in alkaline reducing solutions

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