Description

2,7-Naphthalenedisulfonic acid, 5-amino-4-hydroxy-3-[[6-sulfo-4-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenyl]azo]-, diazotized, coupled with diazotized 4-nitrobenzenamine and resorcinol, potassium sodium salts is a complex, high-purity azo dye intermediate. This compound is critical for synthesizing high-value, colorfast dyes and pigments with specific chromatic properties. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant and stable colors.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-performance, poly-sulfonated azo dyes for textiles, leather, and paper.
• Specialty Pigment Manufacturing: Used in the production of pigments for inks, including printing inks and inkjet formulations, requiring excellent lightfastness and water solubility.
• Functional Dyes: Potential use in the creation of dyes for non-textile applications such as lasers, optical data storage, and liquid crystal displays (LCDs).
• Research & Development: Employed in chemical R&D for developing new chromophores and studying structure-color relationships in complex dye chemistry.
• Analytical Reagents: Can be utilized as a staining agent or a complexometric indicator in specific analytical chemistry procedures.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 5-amino-4-hydroxy-3-[[6-sulfo-4-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenyl]azo]-, diazotized, coupled with diazotized 4-nitrobenzenamine and resorcinol, potassium sodium salts
CAS No.	90459-02-2
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; Drimarene Black B-X; Poly-sulfonated azo dye intermediate; Potassium sodium 4-amino-5-hydroxy-3,6-bis((4-sulfo-1-naphthyl)azo)-2,7-naphthalenedisulfonate derivative
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to rigorous quality control protocols to ensure batch-to-batch consistency and purity. Quality is verified through analytical methods including HPLC, spectrophotometry, and titration. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment 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). This material is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept sealed when not in use to prevent absorption of atmospheric moisture and degradation.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
Heavy Metals (as Pb)	Max. 20 ppm
Sulfated Ash	Contact for details

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