Description

Sodium 5-Hydroxy-6-(Naphthylazo)Naphthalenesulphonate is a specialized azo dye intermediate and analytical reagent. This compound is valued for its ability to form stable, colored complexes with various metal ions, making it a critical component in specific detection and coloration processes. It is primarily required by manufacturers in the chemical synthesis, analytical chemistry, and specialty dye industries for applications requiring precise chromogenic reactions.

Application

• Analytical Reagent: Used as a chromogenic agent in the spectrophotometric determination and complexometric titration of metal ions such as aluminum, magnesium, and calcium.
• Dye Intermediate: Serves as a key precursor in the synthesis of specific azo dyes and pigments, particularly those requiring naphthalene-based structures for color fastness.
• Complexometric Indicator: Employed in EDTA titrations for the visual endpoint detection of certain metal cations due to its distinct color change upon complexation.
• Research & Development: Utilized in laboratory settings for method development in analytical chemistry and material science research.
• Photographic Industry: Can be used in certain photographic chemicals and sensitizers.
• Textile Auxiliary: Potential use in specialized textile processing where metal-complexing properties are beneficial.

Basic Information

Product Name	Sodium 5-Hydroxy-6-(Naphthylazo)Naphthalenesulphonate
CAS No.	5858-53-7
Molecular Formula	C20H13N2NaO4S
Molecular Weight	400.38 g/mol
Synonyms	5-Hydroxy-6-(naphthylazo)naphthalene-2-sulfonic acid sodium salt; 6-(Naphthalen-1-yldiazenyl)-5-hydroxynaphthalene-2-sulfonic acid sodium salt; Sodium 6-(1-naphthylazo)-5-hydroxy-2-naphthalenesulfonate; 1-Naphthylazo R salt; Magon-Sulfonate; Aluminum reagent; SPADNS reagent; Acid Chrome Blue SE; Ericchrome Blue SE.
EINECS	227-480-7

Quality Control

Our Sodium 5-Hydroxy-6-(Naphthylazo)Naphthalenesulphonate is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for use as an analytical reagent and intermediate. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance with your quality requirements.

Storage

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

Specification

Item	Specification
Appearance	Dark red to brownish-red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, red solution

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