Description

4-Hydroxy-6-[Methyl[[2-(Sulphooxy)Ethyl]Sulphonyl]Amino]-3-[(4-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid, Potassium Sodium Salt is a high-purity, water-soluble azo dye intermediate characterized by its multiple sulphonic acid groups. This compound is valued for its ability to impart bright, stable color and its excellent solubility in aqueous systems, which is critical for downstream formulation. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for the synthesis of reactive and acid dyes.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton, wool, and nylon fibers.
• Acid Dye Manufacturing: Used in the production of acid dyes for coloring silk, wool, and polyamide textiles.
• Inkjet Ink Formulations: Serves as a colorant precursor in the manufacture of professional-grade pigment and dye-based inks.
• Paper Coloring: Employed in the production of dyes for specialty paper and packaging materials.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.
• Functional Polymer Synthesis: Can be incorporated into polymers to introduce chromophoric or ionic properties.

Basic Information

Product Name	4-Hydroxy-6-[Methyl[[2-(Sulphooxy)Ethyl]Sulphonyl]Amino]-3-[(4-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid, Potassium Sodium Salt
CAS No.	94109-40-7
Molecular Formula	C20H16KN3NaO13S4
Molecular Weight	753.70 g/mol
Synonyms	Reactive Black 5 Intermediate; Potassium Sodium 4-Hydroxy-6-((2-(sulfooxy)ethyl)sulfonyl)(methyl)amino)-3-((4-sulfophenyl)diazenyl)naphthalene-2-sulfonate; C.I. Reactive Black 5, Potassium Sodium Salt; 6-[Methyl[(2-sulfooxyethyl)sulfonyl]amino]-4-hydroxy-3-[(4-sulfophenyl)azo]-2-naphthalenesulfonic Acid, Potassium Sodium Salt; Azo Dye Intermediate 94109-40-7; Sulphonated Azo Dye Salt; KN-RB5 Intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity, strength, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing assay, related substances, heavy metals, and other critical parameters is provided with each shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	15.0% - 25.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0

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