Description

Sulphon Black R is a synthetic organic dye belonging to the class of acid dyes, widely recognized for its deep, intense black shade and excellent substantivity. Its primary value lies in providing durable, high-quality coloration for protein-based fibers, particularly in demanding industrial applications. This product is essential for manufacturers in the textile, leather, and paper industries seeking reliable and consistent black dyeing agents. The compound is also identified by the CAS registry number 6399-91-3.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve a deep, level black color with good wash and light fastness.
• Leather Finishing: Used in the dyeing of leather goods, providing rich, uniform black shades for footwear, apparel, and upholstery.
• Paper Coloration: Employed in the production of specialty papers, including colored tissues, decorative papers, and packaging materials.
• Ink Formulation: Serves as a colorant in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Wood Staining: Applied in wood treatment processes to impart a dark, penetrating color to timber products.

Basic Information

Product Name	Sulphon Black R
CAS No.	6399-91-3
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	616.49 g/mol
Synonyms	Acid Black 1; C.I. 20470; Naphthalene Black 12B; Amido Black 10B; Acid Black 10B; Aniline Blue Black; Buffalo Black NBR; Lissamine Black 12B
EINECS	229-024-2

Quality Control

Our Sulphon Black R is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with every shipment. We adhere to relevant industry standards and can support compliance requirements for global markets.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Black to dark bluish-black powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0
Ash Content	Max. 1.0%
Heavy Metals (as Pb)	Max. 20 ppm

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