Description

2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-, coupled with diazotized 2-(4-aminophenyl)sulfonylethyl hydrogen sulfate and diazotized 2-amino-5-2-(sulfooxy)ethylsulfonylbenzenesulfonic acid, potassium sodium salts is a high-purity, water-soluble dye intermediate or colorant. This compound is valued for its ability to impart specific, stable hues in demanding industrial applications. It is primarily needed by manufacturers in the textile, ink, and specialty coatings industries seeking consistent color performance and batch-to-batch reliability.

Application

• Textile Dyeing: As a key intermediate for producing reactive or acid dyes for coloring natural and synthetic fibers like cotton, wool, and nylon.
• Ink Formulation: Used in the manufacture of specialty inks, including those for packaging, security printing, and digital textile printing.
• Industrial Coatings: Imparts color to coatings and paints where lightfastness and chemical resistance are required.
• Paper Coloring: Employed in the production of high-grade colored papers and paper products.
• Leather Finishing: Acts as a colorant in dyes and finishes for the leather processing industry.
• Research & Development: Serves as a chemical standard or building block in the synthesis of novel dyes and functional colorants in R&D laboratories.

Basic Information

Product Name	2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-, coupled with diazotized 2-(4-aminophenyl)sulfonylethyl hydrogen sulfate and diazotized 2-amino-5-2-(sulfooxy)ethylsulfonylbenzenesulfonic acid, potassium sodium salts
CAS No.	214362-06-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5 (potassium sodium salt); Reactive Black 5; Remazol Black B; Lanasol Black B; Sumifix Black B; Drimarene Black B; CAS 17095-24-8 (related); 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid coupled derivative; Potassium sodium salt of a diazo-coupled sulfonated dye
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure purity, consistent color strength, and performance. Each batch is analyzed using advanced techniques like HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to guarantee it meets your specific application requirements.

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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100% ± 3% (vs. Standard)
Moisture (KF)	Max. 5.0%
Water Solubility	Complete solution
pH (1% Solution)	6.0 - 8.0
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.