Description

3-[(2,4-Dihydroxyphenyl)Azo]Naphthalene-1,5-Disulphonic Acid is a high-purity azo dye intermediate and analytical reagent with significant commercial and research utility. Its value lies in its precise chemical structure, which serves as a critical building block for synthesizing specialized dyes and pigments, as well as a chelating agent in analytical chemistry. This product is essential for manufacturers and R&D laboratories in the dyestuff, pigment, and chemical analysis sectors seeking reliable, high-quality intermediates for advanced material development.

Application

• Primary Intermediate for Azo Dyes & Pigments: A key precursor in the synthesis of metal-complex dyes, acid dyes, and direct dyes for textiles, leather, and paper.
• Analytical Chemistry Reagent: Utilized as a metallochromic indicator and chelating agent in complexometric titrations for the determination of metal ions.
• Research & Development: Serves as a model compound in photochemical studies and for developing new functional dyes with specific light-absorption properties.
• Specialty Chemical Synthesis: Used in the production of colorants for inks, coatings, and plastics where specific color fastness and stability are required.

Basic Information

Product Name	3-[(2,4-Dihydroxyphenyl)Azo]Naphthalene-1,5-Disulphonic Acid
CAS No.	4317-65-1
Molecular Formula	C₁₆H₁₂N₂O₈S₂
Molecular Weight	424.41 g/mol
Synonyms	Acid Chrome Blue K; 1,5-Naphthalenedisulfonic acid, 3-[(2,4-dihydroxyphenyl)azo]-; 3-[(2,4-Dihydroxyphenyl)diazenyl]naphthalene-1,5-disulfonic acid; C.I. Mordant Blue 1; Chrome Azurol S precursor; Alizarin Violet; Ericchrome Azurol B; 4317-65-1
EINECS	224-333-7

Quality Control

Our production of 3-[(2,4-Dihydroxyphenyl)Azo]Naphthalene-1,5-Disulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with technical-grade specifications. A Certificate of Analysis (COA) detailing all critical parameters is provided with each shipment to guarantee traceability and support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. The compound is light-sensitive; prolonged exposure to light should be avoided to maintain stability.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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