Description

2-Naphthalenesulfonic Acid, 5(Or 8)-Amino-8(Or 5)-[(4-Hydroxyphenyl)Amino]-, Reaction Products With Sodium Sulfide (Na2(Sx)) is a specialized organic chemical complex primarily used as a key intermediate in the synthesis of sulfur dyes and pigments. This product matters for its ability to impart specific color properties and enhanced fastness in textile applications, offering manufacturers a reliable and consistent building block. It is essential for chemical producers and formulators in the dye and pigment industries seeking to develop high-performance coloring agents for textiles, leather, and other materials.

Application

• Primary Intermediate for Sulfur Dyes: A crucial building block in the manufacturing of black, blue, and brown sulfur dyes for cotton and cellulosic fibers.
• Pigment Synthesis: Used in the production of organic pigments where sulfur-containing structures are required for stability and color strength.
• Textile Coloring: Imparts deep, wash-fast colors to textiles, particularly in applications requiring economical and durable dyeing.
• Leather Dyeing: Employed in the formulation of dyes for leather goods, providing good penetration and color fastness.
• Research & Development: Serves as a valuable intermediate for chemists developing new dye molecules and studying structure-color relationships.
• Industrial Colorant Production: Used in the synthesis of colorants for paper, wood staining, and other industrial applications where sulfur chemistry is advantageous.

Basic Information

Product Name	2-Naphthalenesulfonic Acid, 5(Or 8)-Amino-8(Or 5)-[(4-Hydroxyphenyl)Amino]-, Reaction Products With Sodium Sulfide (Na2(Sx))
CAS No.	1327-69-1
Molecular Formula	Complex Mixture
Molecular Weight	Contact for details
Synonyms	C.I. Sulfur Black 1; Sulfur Black B; Immedial Black; Kayaku Homodye Black; Sulphur Black 1; C.I. 53185; Reaction products of 8-amino-5-[(4-hydroxyphenyl)amino]-2-naphthalenesulfonic acid with sodium sulfide; Aminohydroxyphenylaminonaphthalenesulfonic acid sodium sulfide reaction product
EINECS	215-521-5

Quality Control

Our production of 2-Naphthalenesulfonic Acid, 5(Or 8)-Amino-8(Or 5)-[(4-Hydroxyphenyl)Amino]-, Reaction Products With Sodium Sulfide adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance in downstream synthesis. Each lot is analyzed against key specifications for dyeing strength, solubility, and impurity profile. Certificates of Analysis (COA) documenting purity, physical properties, and performance tests are available upon request to support your quality assurance and regulatory needs.

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 excessive heat. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Dark gray to black powder or granules
Identification (IR)	Conforms to structure
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 3.0%
pH (1% Solution)	7.0 - 9.5
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.