Description

Sodium 2-Diazo-1-Naphthol-5-Sulfonate CAS NO 2657-00-3 is a specialized diazonium salt derivative, valued for its role as a key intermediate in the synthesis of dyes, pigments, and photoactive compounds. Its primary commercial value lies in its ability to introduce the diazo functional group, which is critical for creating colorants with specific light-fastness and hue properties. This product is essential for manufacturers in the dye and pigment industry, as well as for research laboratories developing advanced materials and analytical reagents.

Application

• Dye and Pigment Intermediate: A crucial precursor for the synthesis of azo dyes and pigments, particularly for shades of orange, red, and brown.
• Photographic Chemicals: Used in the formulation of light-sensitive layers for specialized photographic papers and films.
• Analytical Reagent: Employed in chemical analysis and laboratory research as a coupling agent for the detection and quantification of specific compounds.
• Polymer Modification: Acts as a functional monomer or cross-linking agent in the production of specialty polymers with unique properties.
• Textile Printing: Serves as an intermediate in the manufacture of colorants used for textile printing and dyeing processes.
• Research & Development: A valuable building block in organic synthesis for academic and industrial R&D projects exploring new diazonium chemistry.

Basic Information

Product Name	Sodium 2-Diazo-1-Naphthol-5-Sulfonate
CAS No.	2657-00-3
Molecular Formula	C10H5N2NaO4S
Molecular Weight	272.21 g/mol
Synonyms	2-Diazo-1-naphthol-5-sulfonic acid sodium salt; 1-Naphthol-5-sulfonic acid, 2-diazo-, sodium salt; Sodium 2-diazo-1-naphthalenol-5-sulfonate; Diazonaphthol sulfonate; Fast Scarlet GG Salt; Variamine Blue Salt B; 5-Sulfo-2,1-naphthoquinone diazide sodium salt; 2,1,4-Diazoxide sodium salt
EINECS	220-190-1

Quality Control

Our Sodium 2-Diazo-1-Naphthol-5-Sulfonate is manufactured under strict quality protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed against stringent in-house specifications, which typically include identity confirmation by IR spectroscopy, purity assay by HPLC, and control of key impurities. A Certificate of Analysis (COA) detailing all test results 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 place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent degradation from atmospheric moisture. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Clear, yellow solution
Heavy Metals (as Pb)	≤ 20 ppm

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