Description

C.I. Leuco Sulphur Red 6 is a specialized sulfur-based leuco dye intermediate. This compound is valued for its role in the synthesis of high-performance sulfur dyes, which are essential for achieving deep, economical, and wash-fast colorations. It is primarily required by manufacturers in the textile dyeing and pigment industries for producing red and reddish-brown shades on cellulosic fibers like cotton.

Application

• Primary Intermediate for Sulfur Dyes: Key starting material in the manufacturing of C.I. Sulphur Red 6 and related sulfur dye products.
• Textile Dyeing: Used in the production of dyes for exhaust dyeing, continuous dyeing, and garment dyeing of cotton, viscose, and other cellulose-based fabrics.
• Leather Coloring: Employed in the formulation of dyes for coloring leather goods, providing good penetration and fastness.
• Paper Staining: Applicable in the production of dyes for tinting paper and paperboard.
• Research & Development: Serves as a critical reagent in chemical R&D for developing new dye structures and studying dyeing mechanisms.

Basic Information

Product Name	C.I. Leuco Sulphur Red 6
CAS No.	12262-37-2
Molecular Formula	C14H8N2O5S2
Molecular Weight	348.35 g/mol
Synonyms	Leuco Sulphur Red 6; C.I. 53720; Leuco Sulphur Red G; Vat Red 1 Leuco Base; 2-[(4-Amino-3-methylphenyl)amino]-5-nitrobenzenesulfonic acid; 5-Nitro-2-((4-amino-m-tolyl)amino)benzenesulfonic acid; Sulphur Red 6 Leuco Compound; Benzenesulfonic acid, 2-[(4-amino-3-methylphenyl)amino]-5-nitro-
EINECS	235-527-8

Quality Control

Our C.I. Leuco Sulphur Red 6 is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure consistent purity, chemical identity, and performance in downstream dye synthesis. A detailed Certificate of Analysis (COA) specifying assay, impurity profile, and physical characteristics is provided with every 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). Keep away from strong oxidizing agents and incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Brownish-red powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 2.0%
Sulfated Ash	≤ 1.0%
Solubility	Soluble in alkaline aqueous solutions

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