Description

2-Hydroxy-5-[(8-Sulfo-2-Naphthalenyl)Azo]Benzoic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its strong chromophoric properties and ability to form stable complexes with various metal ions, making it essential for precise colorimetric analysis and specialized dye synthesis. It is a critical material for manufacturers and R&D laboratories in the chemical, analytical, and specialty materials sectors.

Application

• Analytical Chemistry Reagent: Primarily used as a metallochromic indicator and complexometric titrant for the spectrophotometric determination of metals such as aluminum, magnesium, and rare earth elements.
• Dye and Pigment Intermediate: Serves as a key precursor in the synthesis of specific acid dyes and metal-complex dyes for textiles, inks, and specialty coatings.
• Biological Staining: Employed in histological and cytological staining procedures for research and diagnostic purposes.
• Chelating Agent: Utilized in research applications for its selective metal-binding properties in separation and purification processes.
• Photographic Industry: Acts as a sensitizer or filter dye in certain photographic and imaging technologies.
• Sensor Technology: Investigated for use in the development of optical chemical sensors (optodes) for metal ion detection.

Basic Information

Product Name	2-Hydroxy-5-[(8-Sulfo-2-Naphthalenyl)Azo]Benzoic Acid Disodium Salt
CAS No.	10114-97-3
Molecular Formula	C17H10N2Na2O7S
Molecular Weight	440.31 g/mol
Synonyms	Acid Chrome Blue K; Eriochrome Blue Black R; Mordant Black 17; Calcon; 3-Hydroxy-4-[(2-hydroxy-1-naphthyl)azo]-7-nitro-1-naphthalenesulfonic acid sodium salt; 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(2-hydroxy-1-naphthyl)azo]-7-nitro-, disodium salt; C.I. 15705; Aluminon
EINECS	233-314-4

Quality Control

Our 2-Hydroxy-5-[(8-Sulfo-2-Naphthalenyl)Azo]Benzoic Acid Disodium Salt is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for use as a high-grade analytical reagent. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance.

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). Keep away from strong oxidizing agents. The product is light-sensitive (store away from light) and hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption and degradation.

Specification

Item	Specification
Appearance	Dark brownish-red to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0 %
Residue on Ignition (Sulfated Ash)	20.0 - 26.0 %
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0
Solubility (in Water)	Clear, red-brown solution

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